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Initial Release

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Philipp Holzer 2024-10-24 20:26:41 +02:00
commit 56a110d78f
Signed by: nupplaPhil
GPG key ID: 24A7501396EB5432
31 changed files with 3023 additions and 0 deletions
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.gitignore

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friendica-exporter
friendica-exporter.yml
config.yml
dist/

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linters:
enable:
- gofumpt

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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [0.1.0] - 2019-10-12
- Initial release
[0.1.0]: https://git.opensocial.at/nupplaPhil/friendica-exporter/releases/tag/v0.1.0

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FROM --platform=$BUILDPLATFORM golang:1.23.2-alpine AS builder
ARG TARGETOS
ARG TARGETARCH
ENV GOOS=$TARGETOS
ENV GOARCH=$TARGETARCH
RUN apk add --no-cache make git bash
WORKDIR /build
COPY go.mod go.sum /build/
RUN go mod download
RUN go mod verify
COPY . /build/
RUN make build-binary
FROM busybox
LABEL maintainer="Philipp Holzer <admin@philipp.info>"
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
COPY --from=builder /build/friendica-exporter /bin/friendica-exporter
USER nobody
EXPOSE 9205
ENTRYPOINT ["/bin/friendica-exporter"]

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GNU AFFERO GENERAL PUBLIC LICENSE
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the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

52
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SHELL := /bin/bash
GO ?= go
GO_CMD := CGO_ENABLED=0 $(GO)
GIT_VERSION := $(shell git describe --tags --dirty)
VERSION := $(GIT_VERSION:v%=%)
GIT_COMMIT := $(shell git rev-parse HEAD)
DOCKER_REPO ?= friendica/friendica-exporter
DOCKER_TAG ?= dev
.PHONY: all
all: test build-binary
.PHONY: test
test:
$(GO_CMD) test -cover ./...
.PHONY: lint
lint: $(GOLANGCI_LINT)
$(GOLANGCI_LINT) run --fix
.PHONY: build-binary
build-binary:
$(GO_CMD) build -tags netgo -ldflags "-w -X main.Version=$(VERSION) -X main.GitCommit=$(GIT_COMMIT)" -o friendica-exporter .
.PHONY: deb
deb: build-binary
mkdir -p dist/deb/DEBIAN dist/deb/usr/bin
sed 's/%VERSION%/$(VERSION)/' contrib/debian/control > dist/deb/DEBIAN/control
cp friendica-exporter dist/deb/usr/bin/
fakeroot dpkg-deb --build dist/deb dist
.PHONY: install
install:
install -D -t $(DESTDIR)/usr/bin/ friendica-exporter
install -D -m 0644 -t $(DESTDIR)/lib/systemd/system/ contrib/friendica-exporter.service
.PHONY: image
image:
docker buildx build -t "$(DOCKER_REPO):$(DOCKER_TAG)" --load .
.PHONY: all-images
all-images:
docker buildx build -t "$(DOCKER_REPO):$(DOCKER_TAG)" -t "docker.io/$(DOCKER_REPO):$(DOCKER_TAG)" --platform linux/amd64,linux/arm64 --push .
.PHONY: tools
tools: $(BINGO) $(GOLANGCI_LINT)
@echo Tools built.
.PHONY: clean
clean:
rm -f friendica-exporter
rm -r dist

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# friendica-exporter
A [prometheus](https://prometheus.io) exporter for getting some metrics of a [Friendica](https://friendi.ca/) server instance.
## Installation
### Docker image
The preferred way to use `friendica-exporter` is by running the provided Docker image.
It is currently provided on Docker Hub:
- [`friendica/friendica-exporter`](https://hub.docker.com/r/friendica/friendica-exporter/)
The following tags are available:
- `x.y.z` pointing to the release with that version
- `latest` pointing to the most recent released version
- `master` pointing to the latest build from the default branch
### Pre-built binaries
The [releases](https://git.friendi.ca/friendica-exporter/releases) page contains pre-built binaries for AMD64 and ARM64 linux.
### Build from Source
If you have a recent Go installation (see `go.mod` for the minimum version), Git and GNU Make, the following commands will check out the repository and compile the binary from source:
```bash
git clone https://git.friendi.ca/friendica/friendica-exporter.git
cd friendica-exporter
make
```
After this there should be a `friendica-exporter` binary in your current directory.
### Token authentication
Frienidca only supports using a `system.stats_token` to access the `/stats` endpoint.
You can set the token to anything you like, but teh recommendation is to set it to along random number:
```bash
# Generate random value (for example using openssl)
TOKEN=$(openssl rand -hex 32)
# Set token (using the occ console application)
bin/console.php config system stats_config "$TOKEN"
```
## Usage
```plain
$ friendica-exporter --help
Usage of friendica-exporter:
-a, --addr string Address to listen on for connections. (default ":9205")
-c, --config-file string Path to YAML configuration file.
-s, --server string URL to Friendica server.
-u, --statsToken string Token for statistics Endpoint of Friendica.
-t, --timeout duration Timeout for getting server info document. (default 5s)
--tls-skip-verify Skip certificate verification of Friendica server.
-V, --version Show version information and exit.
```
After starting the server will offer the metrics on the `/metrics` endpoint, which can be used as a target for prometheus.
### Example Dashboard
The repository contains an [example Grafana dashboard](contrib/grafana-dashboard.json) that can be imported into Grafana.
### Configuration methods
There are three methods of configuring the friendica-exporter (higher methods take precedence over lower ones):
- Environment variables
- Configuration file
- Command-line parameters
#### Environment variables
All settings can also be specified through environment variables:
| Environment variable | Flag equivalent |
|----------------------------:|:---------------------|
| `FRIENDICA_SERVER` | --server |
| `FRIENDICA_STATS_TOKEN` | --stats-token |
| `FRIENDICA_LISTEN_ADDRESS` | --addr |
| `FRIENDICA_TIMEOUT` | --timeout |
| `FRIENDICA_TLS_SKIP_VERIFY` | --tls-skip-verify |
#### Configuration file
The `--config-file` option can be used to read the configuration options from a YAML file:
```yaml
# required
server: "https://example.com"
# required for token authentication
statsToken: "example-token"
# optional
listenAddress: ":9205"
timeout: "5s"
tlsSkipVerify: false
```
### Loading Credentials from Files
The stats token can optionally be read from a separate file instead of directly from the input methods above.
This can be achieved by setting the value to the path of the file prefixed with an "@", for example:
```bash
# Authentication token
friendica-exporter -c config-without-token.yml --stats-token @/path/to/tokenfile
```
This also works when token token is set using one of the other configuration modes (configuration file or environment variables).
## Other information
### Info URL
The exporter reads the metrics from the Friendica server using its "stats" endpoint.
It should look something like this:
```plain
https://example.com/stats
```
The path will be automatically added to the server URL you provide, so in the above example setting `--server https://example.com` would be sufficient.
If you open this URL in a browser you should see an XML structure with the information that will be used by the exporter.
### Scrape configuration
The exporter will query the friendica server every time it is scraped by prometheus.
If you want to reduce load on the friendica server you need to change the scrape interval accordingly:
```yml
scrape_configs:
- job_name: 'friendica'
scrape_interval: 90s
static_configs:
- targets: ['friendica:9205']
```
### Exported metrics
These metrics are exported by `friendica-exporter`:
| name | description |
|----------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| friendica_cron_last_execution | Contains information about the last execution of cron of this Instance |
| friendica_exporter_info | Information about the friendica-exporter |
| friendica_up | Indicates if the metrics could be scraped by the exporter |
| friendica_update_available | Contains information whether a system update is available (0 = no, 1 = yes). The available_version level contains the latest available Friendica version, whereas the version level contains the current installed Friendica version. |
| friendica_update_db_status | Contains information whether a database update was successful (0 = no, 1 = yes) |
| friendica_update_status | Contains information whether a system update was successful (1 = no, 0 = yes) |
| friendica_users_active_half_year | Number of active users of the last half year |
| friendica_users_active_month | Number of active users of the last month |
| friendica_users_active_week | Number of active users of the last week |
| friendica_users_pending | Number of pending users |
| friendica_users_total | Number of total users of this Instance |
| friendica_worker_jpm | Number of jobs per Minute |
| friendica_worker_last_execution | Contains information about the last execution of worker of this Instance |
| friendica_worker_tasks_active | Number of active worker tasks of this Instance |
| friendica_worker_tasks_total | Number of worker tasks of this Instance |

14
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Package: friendica-exporter
Architecture: amd64
Version: %VERSION%
Maintainer: Philipp Holzer <admin@philipp.info
Homepage: https://git.friendi.ca/friendica/friendica-exporter
Section: net
Priority: optional
Recommends: prometheus
Description: Prometheus exporter for Friendica metrics
The friendica-exporter can be used to gather metrics from a Friendica server
instance.
.
A Prometheus server is needed to pull and store the metrics generated by the
exporter, but it does not need to be on the same machine.

18
contrib/friendica-exporter.service Normal file
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[Unit]
Description=Prometheus exporter for Friendica metrics
Documentation=https://git.friendi.ca/friendica/friendica-exporter
After=network.target nss-lookup.target
[Service]
Type=simple
ExecStart=/usr/bin/friendica-exporter -c /etc/friendica-exporter.yml
User=friendica-exporter
Group=friendica-exporter
PrivateTmp=true
ProtectHome=true
ProtectSystem=full
Restart=on-failure
RestartSec=20
[Install]
WantedBy=multi-user.target

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{
"__inputs": [
{
"name": "DS_LOCAL",
"label": "Prometheus",
"description": "",
"type": "datasource",
"pluginId": "prometheus",
"pluginName": "Prometheus"
}
],
"__elements": {},
"__requires": [
{
"type": "grafana",
"id": "grafana",
"name": "Grafana",
"version": "10.2.3"
},
{
"type": "panel",
"id": "piechart",
"name": "Pie chart",
"version": ""
},
{
"type": "datasource",
"id": "prometheus",
"name": "Prometheus",
"version": "1.0.0"
},
{
"type": "panel",
"id": "stat",
"name": "Stat",
"version": ""
},
{
"type": "panel",
"id": "timeseries",
"name": "Time series",
"version": ""
}
],
"annotations": {
"list": [
{
"builtIn": 1,
"datasource": {
"type": "grafana",
"uid": "-- Grafana --"
},
"enable": true,
"hide": true,
"iconColor": "rgba(0, 211, 255, 1)",
"name": "Annotations & Alerts",
"type": "dashboard"
}
]
},
"editable": true,
"fiscalYearStartMonth": 0,
"graphTooltip": 0,
"id": 32,
"links": [
{
"asDropdown": false,
"icon": "external link",
"includeVars": true,
"keepTime": true,
"tags": [
"friendica"
],
"targetBlank": false,
"title": "Dashboards",
"tooltip": "",
"type": "dashboards",
"url": ""
}
],
"panels": [
{
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"fieldConfig": {
"defaults": {
"color": {
"mode": "palette-classic"
},
"custom": {
"axisBorderShow": false,
"axisCenteredZero": false,
"axisColorMode": "text",
"axisLabel": "",
"axisPlacement": "auto",
"barAlignment": 0,
"barWidthFactor": 0.6,
"drawStyle": "line",
"fillOpacity": 10,
"gradientMode": "none",
"hideFrom": {
"legend": false,
"tooltip": false,
"viz": false
},
"insertNulls": false,
"lineInterpolation": "linear",
"lineWidth": 1,
"pointSize": 5,
"scaleDistribution": {
"type": "linear"
},
"showPoints": "never",
"spanNulls": false,
"stacking": {
"group": "A",
"mode": "none"
},
"thresholdsStyle": {
"mode": "off"
}
},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "green",
"value": null
},
{
"color": "red",
"value": 80
}
]
}
},
"overrides": []
},
"gridPos": {
"h": 8,
"w": 12,
"x": 0,
"y": 0
},
"id": 3,
"options": {
"legend": {
"calcs": [],
"displayMode": "list",
"placement": "bottom",
"showLegend": true
},
"tooltip": {
"mode": "single",
"sort": "none"
}
},
"pluginVersion": "11.3.0",
"targets": [
{
"editorMode": "code",
"expr": "friendica_worker_jpm{instance=\"$instance\"}",
"legendFormat": "{{frequency}}",
"range": true,
"refId": "A"
}
],
"title": "Jobs per Minute",
"type": "timeseries"
},
{
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"fieldConfig": {
"defaults": {
"color": {
"mode": "palette-classic"
},
"custom": {
"axisBorderShow": false,
"axisCenteredZero": false,
"axisColorMode": "text",
"axisLabel": "",
"axisPlacement": "auto",
"barAlignment": 0,
"barWidthFactor": 0.6,
"drawStyle": "line",
"fillOpacity": 10,
"gradientMode": "none",
"hideFrom": {
"legend": false,
"tooltip": false,
"viz": false
},
"insertNulls": false,
"lineInterpolation": "linear",
"lineWidth": 1,
"pointSize": 5,
"scaleDistribution": {
"type": "linear"
},
"showPoints": "never",
"spanNulls": false,
"stacking": {
"group": "A",
"mode": "none"
},
"thresholdsStyle": {
"mode": "off"
}
},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "green",
"value": null
},
{
"color": "red",
"value": 80
}
]
},
"unit": "none"
},
"overrides": []
},
"gridPos": {
"h": 8,
"w": 12,
"x": 12,
"y": 0
},
"id": 2,
"options": {
"legend": {
"calcs": [],
"displayMode": "list",
"placement": "bottom",
"showLegend": true
},
"tooltip": {
"mode": "single",
"sort": "none"
}
},
"pluginVersion": "11.3.0",
"targets": [
{
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"editorMode": "code",
"expr": "friendica_worker_tasks_total{instance=\"$instance\"}",
"legendFormat": "{{level}}",
"range": true,
"refId": "A"
}
],
"title": "Total Worker tasks",
"type": "timeseries"
},
{
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"fieldConfig": {
"defaults": {
"color": {
"mode": "palette-classic"
},
"custom": {
"axisBorderShow": false,
"axisCenteredZero": false,
"axisColorMode": "text",
"axisLabel": "",
"axisPlacement": "auto",
"barAlignment": 0,
"barWidthFactor": 0.6,
"drawStyle": "line",
"fillOpacity": 10,
"gradientMode": "none",
"hideFrom": {
"legend": false,
"tooltip": false,
"viz": false
},
"insertNulls": false,
"lineInterpolation": "linear",
"lineWidth": 1,
"pointSize": 5,
"scaleDistribution": {
"type": "linear"
},
"showPoints": "never",
"spanNulls": false,
"stacking": {
"group": "A",
"mode": "none"
},
"thresholdsStyle": {
"mode": "off"
}
},
"mappings": [],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "green",
"value": null
},
{
"color": "red",
"value": 80
}
]
},
"unit": "none"
},
"overrides": []
},
"gridPos": {
"h": 8,
"w": 12,
"x": 0,
"y": 8
},
"id": 1,
"options": {
"legend": {
"calcs": [],
"displayMode": "list",
"placement": "bottom",
"showLegend": true
},
"tooltip": {
"mode": "single",
"sort": "none"
}
},
"pluginVersion": "11.3.0",
"targets": [
{
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"editorMode": "code",
"expr": "friendica_worker_tasks_active{instance=\"$instance\"}",
"legendFormat": "{{level}}",
"range": true,
"refId": "A"
}
],
"title": "Active Worker tasks",
"type": "timeseries"
}
],
"preload": false,
"schemaVersion": 40,
"tags": [
"friendica"
],
"templating": {
"list": [
{
"current": {
"text": "Prometheus",
"value": "prometheus"
},
"label": "Datasource",
"name": "DS_LOCAL",
"options": [],
"query": "prometheus",
"refresh": 1,
"regex": "",
"type": "datasource"
},
{
"current": {
"text": "opensocial-friendica-exporter:9205",
"value": "opensocial-friendica-exporter:9205"
},
"datasource": {
"type": "prometheus",
"uid": "${DS_LOCAL}"
},
"definition": "label_values(friendica_up,instance)",
"name": "instance",
"options": [],
"query": {
"qryType": 1,
"query": "label_values(friendica_up,instance)",
"refId": "PrometheusVariableQueryEditor-VariableQuery"
},
"refresh": 2,
"regex": "",
"sort": 1,
"type": "query"
}
]
},
"time": {
"from": "now-3h",
"to": "now"
},
"timepicker": {},
"timezone": "browser",
"title": "Friendica Statistics",
"uid": "ce1viveblgbnkb",
"version": 10,
"weekStart": ""
}

22
go.mod Normal file
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module friendica-exporter
go 1.23.2
require (
github.com/google/go-cmp v0.6.0
github.com/prometheus/client_golang v1.19.0
github.com/sirupsen/logrus v1.9.3
github.com/spf13/pflag v1.0.5
gopkg.in/yaml.v3 v3.0.1
)
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/prometheus/client_model v0.6.0 // indirect
github.com/prometheus/common v0.49.0 // indirect
github.com/prometheus/procfs v0.12.0 // indirect
golang.org/x/sys v0.18.0 // indirect
google.golang.org/protobuf v1.33.0 // indirect
)

44
go.sum Normal file
View file

@ -0,0 +1,44 @@
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_golang v1.19.0 h1:ygXvpU1AoN1MhdzckN+PyD9QJOSD4x7kmXYlnfbA6JU=
github.com/prometheus/client_golang v1.19.0/go.mod h1:ZRM9uEAypZakd+q/x7+gmsvXdURP+DABIEIjnmDdp+k=
github.com/prometheus/client_model v0.6.0 h1:k1v3CzpSRUTrKMppY35TLwPvxHqBu0bYgxZzqGIgaos=
github.com/prometheus/client_model v0.6.0/go.mod h1:NTQHnmxFpouOD0DpvP4XujX3CdOAGQPoaGhyTchlyt8=
github.com/prometheus/common v0.49.0 h1:ToNTdK4zSnPVJmh698mGFkDor9wBI/iGaJy5dbH1EgI=
github.com/prometheus/common v0.49.0/go.mod h1:Kxm+EULxRbUkjGU6WFsQqo3ORzB4tyKvlWFOE9mB2sE=
github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

62
internal/client/client.go Normal file
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package client
import (
"crypto/tls"
"errors"
"fmt"
"friendica-exporter/serverinfo"
"net/http"
"time"
)
var (
ErrNotAuthorized = errors.New("wrong credentials")
ErrRatelimit = errors.New("too many requests")
)
type InfoClient func() (*serverinfo.ServerInfo, error)
func New(statsURL string, timeout time.Duration, userAgent string, tlsSkipVerify bool) InfoClient {
client := &http.Client{
Timeout: timeout,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
// disable TLS certification verification, if desired
InsecureSkipVerify: tlsSkipVerify,
},
},
}
return func() (*serverinfo.ServerInfo, error) {
req, err := http.NewRequest(http.MethodGet, statsURL, nil)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", userAgent)
res, err := client.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
switch res.StatusCode {
case http.StatusOK:
break
case http.StatusUnauthorized:
return nil, ErrNotAuthorized
case http.StatusTooManyRequests:
return nil, ErrRatelimit
default:
return nil, fmt.Errorf("unexpected status code: %d", res.StatusCode)
}
status, err := serverinfo.ParseJSON(res.Body)
if err != nil {
return nil, fmt.Errorf("can not parse server info: %w", err)
}
return status, nil
}
}

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internal/client/client_test.go Normal file
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package client
import (
"errors"
"fmt"
"net/http"
"net/http/httptest"
"testing"
"time"
"friendica-exporter/internal/testutil"
"friendica-exporter/serverinfo"
"github.com/google/go-cmp/cmp"
)
func TestClient(t *testing.T) {
wantUserAgent := "test-ua"
tt := []struct {
desc string
handler func(t *testing.T) http.Handler
wantInfo *serverinfo.ServerInfo
wantErr error
}{
{
desc: "statstoken",
handler: func(t *testing.T) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintln(w, "{}")
})
},
wantInfo: &serverinfo.ServerInfo{},
wantErr: nil,
},
{
desc: "user-agent",
handler: func(t *testing.T) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
ua := req.UserAgent()
if ua != wantUserAgent {
t.Errorf("got user-agent %q, want %q", ua, wantUserAgent)
}
fmt.Fprintln(w, "{}")
})
},
wantInfo: &serverinfo.ServerInfo{},
wantErr: nil,
},
{
desc: "parse error",
handler: func(t *testing.T) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(http.StatusOK)
})
},
wantInfo: nil,
wantErr: errors.New("can not parse server info: EOF"),
},
{
desc: "ratelimit",
handler: func(t *testing.T) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(http.StatusTooManyRequests)
})
},
wantErr: ErrRatelimit,
},
}
for _, tc := range tt {
tc := tc
t.Run(tc.desc, func(t *testing.T) {
t.Parallel()
s := httptest.NewServer(tc.handler(t))
defer s.Close()
client := New(s.URL, time.Second, wantUserAgent, false)
info, err := client()
if !testutil.EqualErrorMessage(err, tc.wantErr) {
t.Errorf("got error %q, want %q", err, tc.wantErr)
}
if err != nil {
return
}
if diff := cmp.Diff(info, tc.wantInfo); diff != "" {
t.Errorf("info differs: -got+want\n%s", diff)
}
})
}
}

229
internal/config/config.go Normal file
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package config
import (
"errors"
"fmt"
"os"
"strconv"
"strings"
"time"
"github.com/spf13/pflag"
"gopkg.in/yaml.v3"
)
const (
envPrefix = "FRIENDICA_"
envListenAddress = envPrefix + "LISTEN_ADDRESS"
envTimeout = envPrefix + "TIMEOUT"
envServerURL = envPrefix + "SERVER"
envStatsToken = envPrefix + "STATS_TOKEN"
envTLSSkipVerify = envPrefix + "TLS_SKIP_VERIFY"
)
// RunMode signals what the main application should do after parsing the options.
type RunMode int
const (
// RunModeExporter is the normal operation as an exporter serving metrics via HTTP.
RunModeExporter RunMode = iota
// RunModeHelp shows information about available options.
RunModeHelp
// RunModeVersion shows version information.
RunModeVersion
)
func (m RunMode) String() string {
switch m {
case RunModeExporter:
return "exporter"
case RunModeHelp:
return "help"
case RunModeVersion:
return "version"
default:
return "error"
}
}
// Config contains the configuration options for friendica-exporter.
type Config struct {
ListenAddr string `yaml:"listenAddress"`
Timeout time.Duration `yaml:"timeout"`
ServerURL string `yaml:"server"`
StatsToken string `yaml:"statsToken"`
TLSSkipVerify bool `yaml:"tlsSkipVerify"`
RunMode RunMode
}
var (
errValidateNoServerURL = errors.New("need to set a server URL")
errValidateNoStatsToken = errors.New("need to provide a stats token")
)
// Validate checks if the configuration contains all necessary parameters.
func (c Config) Validate() error {
if len(c.ServerURL) == 0 {
return errValidateNoServerURL
}
if len(c.StatsToken) == 0 {
return errValidateNoStatsToken
}
return nil
}
// Get loads the configuration. Flags, environment variables and configuration file are considered.
func Get() (Config, error) {
return parseConfig(os.Args, os.Getenv)
}
func parseConfig(args []string, envFunc func(string) string) (Config, error) {
result, configFile, err := loadConfigFromFlags(args)
if err != nil {
return Config{}, fmt.Errorf("error parsing flags: %w", err)
}
if configFile != "" {
rawFile, err := loadConfigFromFile(configFile)
if err != nil {
return Config{}, fmt.Errorf("error reading configuration file: %w", err)
}
result = mergeConfig(result, rawFile)
}
env, err := loadConfigFromEnv(envFunc)
if err != nil {
return Config{}, fmt.Errorf("error reading environment variables: %w", err)
}
result = mergeConfig(result, env)
if strings.HasPrefix(result.StatsToken, "@") {
fileName := strings.TrimPrefix(result.StatsToken, "@")
statsToken, err := readStatsTokenFile(fileName)
if err != nil {
return Config{}, fmt.Errorf("can not read stats token file: %w", err)
}
result.StatsToken = statsToken
}
return result, nil
}
func defaultConfig() Config {
return Config{
ListenAddr: ":9205",
Timeout: 5 * time.Second,
}
}
func loadConfigFromFlags(args []string) (result Config, configFile string, err error) {
defaults := defaultConfig()
flags := pflag.NewFlagSet(args[0], pflag.ContinueOnError)
flags.StringVarP(&configFile, "config-file", "c", "", "Path to YAML configuration file.")
flags.StringVarP(&result.ListenAddr, "addr", "a", defaults.ListenAddr, "Address to listen on for connections.")
flags.DurationVarP(&result.Timeout, "timeout", "t", defaults.Timeout, "Timeout for getting server info document.")
flags.StringVarP(&result.ServerURL, "server", "s", "", "URL to Friendica server.")
flags.StringVarP(&result.StatsToken, "stats-token", "u", defaults.StatsToken, "Token for statistics Endpoint of Friendica.")
flags.BoolVar(&result.TLSSkipVerify, "tls-skip-verify", defaults.TLSSkipVerify, "Skip certificate verification of Friendica server.")
modeVersion := flags.BoolP("version", "V", false, "Show version information and exit.")
if err := flags.Parse(args[1:]); err != nil {
if err == pflag.ErrHelp {
return Config{
RunMode: RunModeHelp,
}, "", nil
}
return Config{}, "", err
}
if *modeVersion {
return Config{
RunMode: RunModeVersion,
}, "", nil
}
return result, configFile, nil
}
func loadConfigFromFile(fileName string) (Config, error) {
file, err := os.Open(fileName)
if err != nil {
return Config{}, err
}
var result Config
if err := yaml.NewDecoder(file).Decode(&result); err != nil {
return Config{}, err
}
return result, nil
}
func loadConfigFromEnv(getEnv func(string) string) (Config, error) {
tlsSkipVerify := false
if rawValue := getEnv(envTLSSkipVerify); rawValue != "" {
value, err := strconv.ParseBool(rawValue)
if err != nil {
return Config{}, fmt.Errorf("can not parse value for %q: %s", envTLSSkipVerify, rawValue)
}
tlsSkipVerify = value
}
result := Config{
ListenAddr: getEnv(envListenAddress),
ServerURL: getEnv(envServerURL),
StatsToken: getEnv(envStatsToken),
TLSSkipVerify: tlsSkipVerify,
}
if raw := getEnv(envTimeout); raw != "" {
value, err := time.ParseDuration(raw)
if err != nil {
return Config{}, err
}
result.Timeout = value
}
return result, nil
}
func mergeConfig(base, override Config) Config {
result := base
if override.ListenAddr != "" {
result.ListenAddr = override.ListenAddr
}
if override.ServerURL != "" {
result.ServerURL = override.ServerURL
}
if override.StatsToken != "" {
result.StatsToken = override.StatsToken
}
if override.Timeout != 0 {
result.Timeout = override.Timeout
}
if override.TLSSkipVerify {
result.TLSSkipVerify = override.TLSSkipVerify
}
return result
}
func readStatsTokenFile(fileName string) (string, error) {
bytes, err := os.ReadFile(fileName)
if err != nil {
return "", err
}
return strings.TrimSuffix(string(bytes), "\n"), nil
}

300
internal/config/config_test.go Normal file
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package config
import (
"errors"
"testing"
"time"
"friendica-exporter/internal/testutil"
"github.com/google/go-cmp/cmp"
)
func testEnv(env map[string]string) func(string) string {
return func(key string) string {
return env[key]
}
}
func TestConfig(t *testing.T) {
defaults := defaultConfig()
tt := []struct {
desc string
args []string
env map[string]string
wantErr error
wantConfig Config
}{
{
desc: "flags",
args: []string{
"test",
"--addr",
"127.0.0.1:9205",
"--timeout",
"30s",
"--server",
"http://localhost",
"--stats-token",
"/$&/bdgersert6756!",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
ListenAddr: "127.0.0.1:9205",
Timeout: 30 * time.Second,
ServerURL: "http://localhost",
StatsToken: "/$&/bdgersert6756!",
TLSSkipVerify: false,
},
},
{
desc: "password from file",
args: []string{
"test",
"--server",
"http://localhost",
"--stats-token",
"@testdata/statsToken",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
ListenAddr: defaults.ListenAddr,
Timeout: defaults.Timeout,
ServerURL: "http://localhost",
StatsToken: "234563twtwewr",
TLSSkipVerify: false,
},
},
{
desc: "config from file",
args: []string{
"test",
"--config-file",
"testdata/all.yml",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
ListenAddr: "127.0.0.10:9205",
Timeout: 10 * time.Second,
ServerURL: "http://localhost",
StatsToken: "12w4352345zt§&/&)(&/",
TLSSkipVerify: false,
},
},
{
desc: "config and token from file",
args: []string{
"test",
"--config-file",
"testdata/statsTokenFile.yml",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
ListenAddr: "127.0.0.10:9205",
Timeout: 10 * time.Second,
ServerURL: "http://localhost",
StatsToken: "234563twtwewr",
TLSSkipVerify: false,
},
},
{
desc: "don't check tls certificates",
args: []string{
"test",
"--tls-skip-verify",
"true",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
ListenAddr: ":9205",
Timeout: 5 * time.Second,
ServerURL: "",
StatsToken: "",
TLSSkipVerify: true,
},
},
{
desc: "env config",
args: []string{
"test",
},
env: map[string]string{
envListenAddress: "127.0.0.11:9205",
envTimeout: "15s",
envServerURL: "http://localhost",
envStatsToken: "testpass/()/(g21!",
envTLSSkipVerify: "true",
},
wantErr: nil,
wantConfig: Config{
ListenAddr: "127.0.0.11:9205",
Timeout: 15 * time.Second,
ServerURL: "http://localhost",
StatsToken: "testpass/()/(g21!",
TLSSkipVerify: true,
},
},
{
desc: "minimal env",
args: []string{
"test",
},
env: map[string]string{
envServerURL: "http://localhost",
envStatsToken: "testpass/()/(g21!",
},
wantErr: nil,
wantConfig: Config{
ListenAddr: defaults.ListenAddr,
Timeout: defaults.Timeout,
ServerURL: "http://localhost",
StatsToken: "testpass/()/(g21!",
TLSSkipVerify: false,
},
},
{
desc: "show help",
args: []string{
"test",
"--help",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
RunMode: RunModeHelp,
},
},
{
desc: "show version",
args: []string{
"test",
"--version",
},
env: map[string]string{},
wantErr: nil,
wantConfig: Config{
RunMode: RunModeVersion,
},
},
{
desc: "wrongflag",
args: []string{
"test",
"--unknown",
},
env: map[string]string{},
wantErr: errors.New("error parsing flags: unknown flag: --unknown"),
},
{
desc: "env wrong duration",
args: []string{
"test",
},
env: map[string]string{
"FRIENDICA_TIMEOUT": "unknown",
},
wantErr: errors.New("error reading environment variables: time: invalid duration \"unknown\""),
},
{
desc: "token from file error",
args: []string{
"test",
"--server",
"http://localhost",
"--stats-token",
"@testdata/notfound",
},
env: map[string]string{},
wantErr: errors.New("can not read stats token file: open testdata/notfound: no such file or directory"),
},
{
desc: "config from file error",
args: []string{
"test",
"--config-file",
"testdata/notfound.yml",
},
env: map[string]string{},
wantErr: errors.New("error reading configuration file: open testdata/notfound.yml: no such file or directory"),
},
{
desc: "fail parsing tlsSkipVerify env",
args: []string{
"test",
},
env: map[string]string{
envTLSSkipVerify: "invalid",
},
wantErr: errors.New(`error reading environment variables: can not parse value for "FRIENDICA_TLS_SKIP_VERIFY": invalid`),
},
}
for _, tc := range tt {
tc := tc
t.Run(tc.desc, func(t *testing.T) {
t.Parallel()
config, err := parseConfig(tc.args, testEnv(tc.env))
if !testutil.EqualErrorMessage(err, tc.wantErr) {
t.Errorf("got error %q, want %q", err, tc.wantErr)
}
if err != nil {
return
}
if diff := cmp.Diff(config, tc.wantConfig); diff != "" {
t.Errorf("config differs: -got +want\n%s", diff)
}
})
}
}
func TestConfigValidate(t *testing.T) {
tt := []struct {
desc string
config Config
wantErr error
}{
{
desc: "minimal",
config: Config{
ServerURL: "https://example.com",
StatsToken: "testtoken",
},
wantErr: nil,
},
{
desc: "no url",
config: Config{
StatsToken: "testtoken",
},
wantErr: errValidateNoServerURL,
},
{
desc: "auth help",
config: Config{
ServerURL: "https://example.com",
},
wantErr: errValidateNoStatsToken,
},
}
for _, tc := range tt {
tc := tc
t.Run(tc.desc, func(t *testing.T) {
t.Parallel()
err := tc.config.Validate()
if !testutil.EqualErrorMessage(err, tc.wantErr) {
t.Errorf("got error %q, want %q", err, tc.wantErr)
}
})
}
}

4
internal/config/testdata/all.yml vendored Normal file
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@ -0,0 +1,4 @@
listenAddress: 127.0.0.10:9205
timeout: 10s
server: http://localhost
statsToken: 12w4352345zt§&/&)(&/

1
internal/config/testdata/statsToken vendored Normal file
View file

@ -0,0 +1 @@
234563twtwewr

5
internal/config/testdata/statsTokenFile.yml vendored Normal file
View file

@ -0,0 +1,5 @@
listenAddress: 127.0.0.10:9205
timeout: 10s
server: http://localhost
username: testuser
statsToken: "@testdata/statsToken"

363
internal/metrics/collector.go Normal file
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package metrics
import (
"fmt"
"friendica-exporter/internal/client"
"friendica-exporter/serverinfo"
"github.com/prometheus/client_golang/prometheus"
"github.com/sirupsen/logrus"
)
const (
metricPrefix = "friendica_"
labelErrorCauseOther = "other"
labelErrorCauseAuth = "auth"
labelErrorCauseRateLimit = "ratelimit"
)
var (
updateAvailableDesc = prometheus.NewDesc(
metricPrefix+"update_available",
"Contains information whether a system update is available (0 = no, 1 = yes). The available_version level contains the latest available Friendica version, whereas the version level contains the current installed Friendica version.",
[]string{"version", "available_version"}, nil)
updateStatus = prometheus.NewDesc(
metricPrefix+"update_status",
"Contains information whether a system update was successful (1 = no, 0 = yes).",
nil, nil)
updateDatabaseStatus = prometheus.NewDesc(
metricPrefix+"update_db_status",
"Contains information whether a database update was successful (0 = no, 1 = yes).",
nil, nil)
cronLastExecution = prometheus.NewDesc(
metricPrefix+"cron_last_execution",
"Contains information about the last execution of cron of this Instance.",
[]string{"datetime"}, nil)
workerLastExecution = prometheus.NewDesc(
metricPrefix+"worker_last_execution",
"Contains information about the last execution of worker of this Instance.",
[]string{"datetime"}, nil)
workerJPM = prometheus.NewDesc(
metricPrefix+"worker_jpm",
"Number of jobs per Minute.",
[]string{"frequency"}, nil)
workerTasksTotal = prometheus.NewDesc(
metricPrefix+"worker_tasks_total",
"Number of worker tasks of this Instance.",
[]string{"level"}, nil)
workerTasksActive = prometheus.NewDesc(
metricPrefix+"worker_tasks_active",
"Number of active worker tasks of this Instance.",
[]string{"level"}, nil)
usersTotal = prometheus.NewDesc(
metricPrefix+"users_total",
"Number of total users of this Instance.",
nil, nil)
usersActiveWeek = prometheus.NewDesc(
metricPrefix+"users_active_week",
"Number of active users of the last week.",
nil, nil)
usersActiveMonth = prometheus.NewDesc(
metricPrefix+"users_active_month",
"Number of active users of the last month.",
nil, nil)
usersActiveHalfYear = prometheus.NewDesc(
metricPrefix+"users_active_half_year",
"Number of active users of the last half year.",
nil, nil)
usersPending = prometheus.NewDesc(
metricPrefix+"users_pending",
"Number of pending users.",
nil, nil)
)
type friendicaCollector struct {
log logrus.FieldLogger
infoClient client.InfoClient
upMetric prometheus.Gauge
scrapeErrorsMetric *prometheus.CounterVec
}
func RegisterCollector(log logrus.FieldLogger, infoClient client.InfoClient) error {
c := &friendicaCollector{
log: log,
infoClient: infoClient,
upMetric: prometheus.NewGauge(prometheus.GaugeOpts{
Name: metricPrefix + "up",
Help: "Indicates if the metrics could be scraped by the exporter.",
}),
scrapeErrorsMetric: prometheus.NewCounterVec(prometheus.CounterOpts{
Name: metricPrefix + "scrape_errors_total",
Help: "Counts the number of scrape errors by this collector.",
}, []string{"cause"}),
}
return prometheus.Register(c)
}
func (c *friendicaCollector) Describe(ch chan<- *prometheus.Desc) {
c.upMetric.Describe(ch)
c.scrapeErrorsMetric.Describe(ch)
ch <- updateAvailableDesc
ch <- updateStatus
ch <- updateDatabaseStatus
ch <- cronLastExecution
ch <- workerLastExecution
ch <- workerJPM
ch <- workerTasksTotal
ch <- workerTasksActive
ch <- usersTotal
ch <- usersActiveWeek
ch <- usersActiveMonth
ch <- usersActiveHalfYear
ch <- usersPending
}
func (c *friendicaCollector) Collect(ch chan<- prometheus.Metric) {
if err := c.collectFriendica(ch); err != nil {
c.log.Errorf("Error during scrape: %s", err)
cause := labelErrorCauseOther
if err == client.ErrNotAuthorized {
cause = labelErrorCauseAuth
} else if err == client.ErrRatelimit {
cause = labelErrorCauseRateLimit
}
c.scrapeErrorsMetric.WithLabelValues(cause).Inc()
c.upMetric.Set(0)
} else {
c.upMetric.Set(1)
}
c.upMetric.Collect(ch)
c.scrapeErrorsMetric.Collect(ch)
}
func (c *friendicaCollector) collectFriendica(ch chan<- prometheus.Metric) error {
status, err := c.infoClient()
if err != nil {
return err
}
return readMetrics(ch, status)
}
func readMetrics(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
if err := collectSimpleMetrics(ch, status); err != nil {
return err
}
if err := collectWorkerTotal(ch, status); err != nil {
return err
}
if err := collectJPM(ch, status); err != nil {
return err
}
if err := collectLastExecutions(ch, status); err != nil {
return err
}
if err := collectUpdate(ch, status); err != nil {
return err
}
return nil
}
func collectUpdate(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
updateInfo := status.Update
serverInfo := status.Server
updateAvailableValue := 0.0
// Fix small bug: its indicated as "true" even if there is no real update available.
if updateInfo.Available && serverInfo.Version != updateInfo.AvailableVersion {
updateAvailableValue = 1.0
}
metric, err := prometheus.NewConstMetric(updateAvailableDesc, prometheus.GaugeValue, updateAvailableValue, serverInfo.Version, updateInfo.AvailableVersion)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", updateAvailableDesc, err)
}
ch <- metric
return nil
}
type simpleMetric struct {
desc *prometheus.Desc
value float64
}
func collectSimpleMetrics(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
metrics := []simpleMetric{
{
desc: updateStatus,
value: float64(status.Update.Status),
},
{
desc: updateDatabaseStatus,
value: float64(status.Update.DatabaseStatus),
},
{
desc: usersTotal,
value: float64(status.Users.Total),
},
{
desc: usersActiveWeek,
value: float64(status.Users.ActiveWeek),
},
{
desc: usersActiveMonth,
value: float64(status.Users.ActiveMonth),
},
{
desc: usersActiveHalfYear,
value: float64(status.Users.ActiveHalfYear),
},
{
desc: usersPending,
value: float64(status.Users.Pending),
},
}
for _, m := range metrics {
metric, err := prometheus.NewConstMetric(m.desc, prometheus.GaugeValue, m.value)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", m.desc, err)
}
ch <- metric
}
return nil
}
type workerMetric struct {
desc *prometheus.Desc
value float64
level string
}
func collectWorkerTotal(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
metrics := []workerMetric{
{
desc: workerTasksActive,
value: float64(status.Worker.Active.Critical),
level: "critical",
},
{
desc: workerTasksActive,
value: float64(status.Worker.Active.High),
level: "high",
},
{
desc: workerTasksActive,
value: float64(status.Worker.Active.Medium),
level: "medium",
},
{
desc: workerTasksActive,
value: float64(status.Worker.Active.Low),
level: "low",
},
{
desc: workerTasksActive,
value: float64(status.Worker.Active.Negligible),
level: "negligible",
},
{
desc: workerTasksTotal,
value: float64(status.Worker.Total.Critical),
level: "critical",
},
{
desc: workerTasksTotal,
value: float64(status.Worker.Total.High),
level: "high",
},
{
desc: workerTasksTotal,
value: float64(status.Worker.Total.Medium),
level: "medium",
},
{
desc: workerTasksTotal,
value: float64(status.Worker.Total.Low),
level: "low",
},
{
desc: workerTasksTotal,
value: float64(status.Worker.Total.Negligible),
level: "negligible",
},
}
for _, m := range metrics {
metric, err := prometheus.NewConstMetric(m.desc, prometheus.GaugeValue, m.value, m.level)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", m.desc, err)
}
ch <- metric
}
return nil
}
type jpmMetric struct {
desc *prometheus.Desc
value float64
frequency string
}
func collectJPM(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
metrics := []jpmMetric{
{
desc: workerJPM,
value: float64(status.Worker.JPM.OneMinute),
frequency: "1 minute",
},
{
desc: workerJPM,
value: float64(status.Worker.JPM.ThreeMinutes),
frequency: "3 minutes",
},
{
desc: workerJPM,
value: float64(status.Worker.JPM.FiveMinutes),
frequency: "5 minutes",
},
}
for _, m := range metrics {
metric, err := prometheus.NewConstMetric(m.desc, prometheus.GaugeValue, m.value, m.frequency)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", m.desc, err)
}
ch <- metric
}
return nil
}
func collectLastExecutions(ch chan<- prometheus.Metric, status *serverinfo.ServerInfo) error {
workerInfo := status.Worker
metric, err := prometheus.NewConstMetric(workerLastExecution, prometheus.GaugeValue, float64(workerInfo.LastExecution.Timestamp), workerInfo.LastExecution.DateTime)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", workerLastExecution, err)
}
ch <- metric
cronInfo := status.Cron
metric, err = prometheus.NewConstMetric(cronLastExecution, prometheus.GaugeValue, float64(cronInfo.LastExecution.Timestamp), cronInfo.LastExecution.DateTime)
if err != nil {
return fmt.Errorf("error creating metric for %s: %w", cronLastExecution, err)
}
ch <- metric
return nil
}

17
internal/metrics/info.go Normal file
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package metrics
import "github.com/prometheus/client_golang/prometheus"
func RegisterStatsMetrics(version, gitCommit string) error {
statsMetric := prometheus.NewGauge(prometheus.GaugeOpts{
Name: metricPrefix + "exporter_info",
Help: "Information about the friendica-exporter.",
ConstLabels: prometheus.Labels{
"version": version,
"commit": gitCommit,
},
})
statsMetric.Set(1)
return prometheus.Register(statsMetric)
}

20
internal/testutil/testutil.go Normal file
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package testutil
import (
"strings"
)
// EqualErrorMessage compares two errors by just comparing their messages.
func EqualErrorMessage(a, b error) bool {
aMsg := "<nil>"
if a != nil {
aMsg = a.Error()
}
bMsg := "<nil>"
if b != nil {
bMsg = b.Error()
}
return strings.Compare(aMsg, bMsg) == 0
}

70
internal/testutil/testutil_test.go Normal file
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package testutil
import (
"errors"
"testing"
)
type testError struct{}
func (e testError) Error() string {
return "test message"
}
func TestEqualErrorMessage(t *testing.T) {
tt := []struct {
desc string
a error
b error
wantEqual bool
}{
{
desc: "two nil",
a: nil,
b: nil,
wantEqual: true,
},
{
desc: "a not nil",
a: errors.New("error A"),
b: nil,
wantEqual: false,
},
{
desc: "b not nil",
a: nil,
b: errors.New("error B"),
wantEqual: false,
},
{
desc: "both not nil",
a: errors.New("error A"),
b: errors.New("error B"),
wantEqual: false,
},
{
desc: "equal message, same type",
a: errors.New("test message"),
b: errors.New("test message"),
wantEqual: true,
},
{
desc: "equal message, different type",
a: errors.New("test message"),
b: testError{},
wantEqual: true,
},
}
for _, tc := range tt {
tc := tc
t.Run(tc.desc, func(t *testing.T) {
t.Parallel()
equal := EqualErrorMessage(tc.a, tc.b)
if equal != tc.wantEqual {
t.Errorf("got equal %v, want %v", equal, tc.wantEqual)
}
})
}
}

79
main.go Normal file
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package main
import (
"fmt"
"friendica-exporter/internal/client"
"friendica-exporter/internal/config"
"friendica-exporter/internal/metrics"
"friendica-exporter/serverinfo"
"github.com/prometheus/client_golang/prometheus/promhttp"
"net/http"
"os"
"github.com/sirupsen/logrus"
)
var (
// Version contains the version as set during build.
Version = ""
// GitCommit contains the git commit hash set during the build.
GitCommit = ""
log = &logrus.Logger{
Out: os.Stderr,
Formatter: &logrus.TextFormatter{
DisableTimestamp: true,
},
Hooks: make(logrus.LevelHooks),
Level: logrus.InfoLevel,
ExitFunc: os.Exit,
ReportCaller: false,
}
)
func main() {
cfg, err := config.Get()
if err != nil {
log.Fatalf("Error loading configuration: %s", err)
}
if cfg.RunMode == config.RunModeHelp {
return
}
if cfg.RunMode == config.RunModeVersion {
fmt.Println(Version)
return
}
log.Infof("friendica-exporter %s", Version)
userAgent := fmt.Sprintf("friendica-exporter/%s", Version)
if err := cfg.Validate(); err != nil {
log.Fatalf("Error validating configuration: %s", err)
}
log.Infof("Friendica server: %s Authentication using token.", cfg.ServerURL)
statsUrl := serverinfo.StatsURL(cfg.ServerURL, cfg.StatsToken)
if cfg.TLSSkipVerify {
log.Warn("HTTPS certificate verification is disabled.")
}
statsClient := client.New(statsUrl, cfg.Timeout, userAgent, cfg.TLSSkipVerify)
if err := metrics.RegisterCollector(log, statsClient); err != nil {
log.Fatalf("Failed to register collector: %s", err)
}
if err := metrics.RegisterStatsMetrics(Version, GitCommit); err != nil {
log.Fatalf("Failed to register info metrics: %s", err)
}
http.Handle("/metrics", promhttp.Handler())
http.Handle("/", http.RedirectHandler("/metrics", http.StatusFound))
log.Infof("Listen on %s...", cfg.ListenAddr)
log.Fatal(http.ListenAndServe(cfg.ListenAddr, nil))
}

16
serverinfo/parse.go Normal file
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package serverinfo
import (
"encoding/json"
"io"
)
// ParseJSON reads ServerInfo from a Reader in JSON format.
func ParseJSON(r io.Reader) (*ServerInfo, error) {
result := ServerInfo{}
if err := json.NewDecoder(r).Decode(&result); err != nil {
return nil, err
}
return &result, nil
}

28
serverinfo/parse_test.go Normal file
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package serverinfo
import (
"os"
"testing"
)
func TestParseJSON(t *testing.T) {
inputFiles := []string{
"stats.json",
}
for _, inputFile := range inputFiles {
inputFile := inputFile
t.Run(inputFile, func(t *testing.T) {
t.Parallel()
reader, err := os.Open("testdata/" + inputFile)
if err != nil {
t.Fatalf("error opening test data: %s", err)
}
if _, err := ParseJSON(reader); err != nil {
t.Errorf("got error %q", err)
}
})
}
}

122
serverinfo/serverinfo.go Normal file
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package serverinfo
// ServerInfo contains the status information about the instance.
type ServerInfo struct {
Cron Cron `json:"cron"`
Worker Worker `json:"worker"`
Users Users `json:"users"`
Packets Packets `json:"packets"`
Reports Reports `json:"reports"`
Update Update `json:"update"`
Server Server `json:"server"`
}
// DateTimeTimestamp contains a Datetime and a Timestamp
type DateTimeTimestamp struct {
DateTime string `json:"datetime"`
Timestamp int32 `json:"timestamp"`
}
// Cron contains information about the Cronjob
type Cron struct {
LastExecution DateTimeTimestamp `json:"lastExecution"`
}
// JPM contains the KPI "Jobs per Minute"
type JPM struct {
OneMinute int64 `json:"1"`
ThreeMinutes int64 `json:"3"`
FiveMinutes int64 `json:"5"`
}
// WorkerCount contains the count of specific worker tasks, based on their priority
type WorkerCount struct {
Undefined int64 `json:"0"`
Critical int64 `json:"10"`
High int64 `json:"20"`
Medium int64 `json:"30"`
Low int64 `json:"40"`
Negligible int64 `json:"50"`
Total int64 `json:"total"`
}
// Worker contains information about the worker load
type Worker struct {
LastExecution DateTimeTimestamp `json:"lastExecution"`
JPM JPM `json:"jpm"`
Active WorkerCount `json:"active"`
Defferd []int64 `json:"defferd"`
Total WorkerCount `json:"total"`
}
// Users contains statistics about the users of this node
type Users struct {
Total int64 `json:"total"`
ActiveWeek int64 `json:"activeWeek"`
ActiveMonth int64 `json:"activeMonth"`
ActiveHalfYear int64 `json:"activeHalfYear"`
Pending int64 `json:"pending"`
}
// PostCounts contains contains post and comments statistics
type PostCounts struct {
Posts int64 `json:"posts"`
Comments int64 `json:"comments"`
}
// Posts contains statistics about inbound and outbound posts and comments
type Posts struct {
Inbound PostCounts `json:"inbound"`
Outbound PostCounts `json:"outbound"`
}
// PacketCounts contains statistics of protocol specific packages
type PacketCounts struct {
ActivityPub int64 `json:"apub"`
DFRN int64 `json:"dfrn"`
Diaspora int64 `json:"dspr"`
OStatus int64 `json:"stat"`
Feed int64 `json:"feed"`
Mail int64 `json:"mail"`
}
// Packets contains statistics of inbound and outbound packages
type Packets struct {
Inbound PacketCounts `json:"inbound"`
Outbound PacketCounts `json:"outbound"`
}
// Reports contains statistics about Friendica reports
type Reports struct {
Newest DateTimeTimestamp `json:"newest"`
Open int64 `json:"open"`
Closed int64 `json:"closed"`
}
// Update contains information about updates
type Update struct {
Available bool `json:"available"`
AvailableVersion string `json:"available_version"`
Status int8 `json:"status"`
DatabaseStatus int8 `json:"db_status"`
}
// PHP contains information about the PHP used on this node
type PHP struct {
Version string `json:"version"`
UploadMaxFilesize string `json:"upload_max_filesize"`
PostMaxSize string `json:"post_max_filesize"`
MemoryLimit string `json:"memory_limit"`
}
// Database contains information about the Database used on this node
type Database struct {
MaxAllowedPacket string `json:"max_allowed_packet"`
}
// Server contains information about this server
type Server struct {
Version string `json:"version"`
PHP PHP `json:"php"`
Database Database `json:"database"`
}

120
serverinfo/testdata/stats.json vendored Normal file
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{
"cron": {
"lastExecution": {
"datetime": "2024-10-24T16:40:49.000Z",
"timestamp": 1729788049
}
},
"worker": {
"lastExecution": {
"datetime": "2024-10-24T17:18:14.000Z",
"timestamp": 1729790294
},
"jpm": {
"1": 116,
"3": 39,
"5": 23
},
"active": {
"0": 0,
"10": 0,
"20": 11,
"30": 5,
"40": 1,
"50": 0,
"total": 17
},
"deferred": {
"1": 0,
"2": 0,
"3": 0,
"4": 2,
"5": 0,
"6": 0,
"7": 0,
"8": 0,
"9": 0,
"10": 0,
"11": 0,
"12": 0,
"13": 4,
"14": 3,
"15": 1,
"total": 10
},
"total": {
"0": 0,
"10": 0,
"20": 1336,
"30": 12,
"40": 61,
"50": 0,
"total": 1409
}
},
"users": {
"total": 743,
"activeWeek": 27,
"activeMonth": 33,
"activeHalfyear": 58,
"pending": 0
},
"posts": {
"inbound": {
"posts": 4419301,
"comments": 4478614
},
"outbound": {
"posts": 64574,
"comments": 8494
}
},
"packets": {
"inbound": {
"apub": 2504751,
"dfrn": 43419,
"dspr": 132647,
"stat": 0,
"feed": 245683,
"mail": 0,
"bsky": 100578,
"tmbl": 54
},
"outbound": {
"apub": 442807,
"dfrn": 1242,
"dspr": 18782,
"stat": 0,
"feed": 2681,
"mail": 0,
"bsky": 66,
"tmbl": 0
}
},
"reports": {
"newest": {
"datetime": "2024-02-08T07:54:04.000Z",
"timestamp": 1707378844
},
"open": 2,
"closed": 1
},
"update": {
"available": null,
"available_version": "2020.09-1",
"status": 0,
"db_status": 1
},
"server": {
"version": "2024.09-rc",
"php": {
"version": "8.2.24",
"upload_max_filesize": "10G",
"post_max_size": "11G",
"memory_limit": "8G"
},
"database": {
"max_allowed_packet": "16777216"
}
}
}

11
serverinfo/url.go Normal file
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package serverinfo
import "fmt"
const (
statsPathFormat = "%s/stats?key=%v"
)
func StatsURL(serverUrl string, StatsKey string) string {
return fmt.Sprintf(statsPathFormat, serverUrl, StatsKey)
}

31
serverinfo/url_test.go Normal file
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package serverinfo
import "testing"
func TestStatsURL(t *testing.T) {
tt := []struct {
desc string
serverURL string
statsKey string
wantURL string
}{
{
desc: "normal",
serverURL: "https://friendica.example.com",
statsKey: "234/%&/%&/!",
wantURL: "https://friendica.example.com/stats?key=234/%&/%&/!",
},
}
for _, tc := range tt {
tc := tc
t.Run(tc.desc, func(t *testing.T) {
t.Parallel()
url := StatsURL(tc.serverURL, tc.statsKey)
if url != tc.wantURL {
t.Errorf("got url %q, want %q", url, tc.wantURL)
}
})
}
}