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feat: add prometheus metrics & endpoint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package controllers | ||
|
|
||
| import ( | ||
| "log" | ||
|
|
||
| "garm/auth" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| type GarmCollector struct { | ||
| instanceMetric *prometheus.Desc | ||
| apiController *APIController | ||
| } | ||
|
|
||
| func NewGarmCollector(a *APIController) *GarmCollector { | ||
| return &GarmCollector{ | ||
| apiController: a, | ||
| instanceMetric: prometheus.NewDesc( | ||
| "garm_runner_status", | ||
| "Status of the runner", | ||
| []string{"name", "status", "runner_status", "pool", "pool_type", "hostname", "controller_id"}, nil, | ||
| )} | ||
| } | ||
|
|
||
| func (c *GarmCollector) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- c.instanceMetric | ||
| } | ||
|
|
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| func (c *GarmCollector) Collect(ch chan<- prometheus.Metric) { | ||
| c.CollectInstanceMetric(ch) | ||
| } | ||
|
|
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| // CollectInstanceMetric collects the metrics for the runner instances | ||
| // reflecting the statuses and the pool they belong to. | ||
| func (c *GarmCollector) CollectInstanceMetric(ch chan<- prometheus.Metric) { | ||
|
|
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| ctx := auth.GetAdminContext() | ||
|
|
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| instances, err := c.apiController.r.ListAllInstances(ctx) | ||
| if err != nil { | ||
| log.Printf("cannot collect metrics, listing instances: %s", err) | ||
| return | ||
| } | ||
|
|
||
| pools, err := c.apiController.r.ListAllPools(ctx) | ||
| if err != nil { | ||
| log.Printf("listing pools: %s", err) | ||
| // continue anyway | ||
| } | ||
|
|
||
| type poolInfo struct { | ||
| Name string | ||
| Type string | ||
| } | ||
|
|
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| poolNames := make(map[string]poolInfo) | ||
| for _, pool := range pools { | ||
| if pool.EnterpriseName != "" { | ||
| poolNames[pool.ID] = poolInfo{ | ||
| Name: pool.EnterpriseName, | ||
| Type: "enterprise", | ||
| } | ||
| } else if pool.OrgName != "" { | ||
| poolNames[pool.ID] = poolInfo{ | ||
| Name: pool.OrgName, | ||
| Type: "organization", | ||
| } | ||
| } else { | ||
| poolNames[pool.ID] = poolInfo{ | ||
| Name: pool.RepoName, | ||
| Type: "repository", | ||
| } | ||
| } | ||
| } | ||
|
|
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| hostname, controllerID := c.apiController.GetControllerInfo() | ||
|
|
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| for _, instance := range instances { | ||
|
|
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| ch <- prometheus.MustNewConstMetric( | ||
| c.instanceMetric, | ||
| prometheus.GaugeValue, | ||
| 1, | ||
| instance.Name, | ||
| string(instance.Status), | ||
| string(instance.RunnerStatus), | ||
| poolNames[instance.PoolID].Name, | ||
| poolNames[instance.PoolID].Type, | ||
| hostname, | ||
| controllerID, | ||
| ) | ||
| } | ||
| } |
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