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etcdserver: add "etcd_server_id" metric

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```
etcd_server_id{server_id="8e9e05c52164694d"} 1
```

Useful for automating membership change operations,
no need to run "endpoint status" or "member list"
command to get member IDs.

Also, useful for "etcd_network" metrics with "To/From" labels.

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>
This commit is contained in:
Gyuho Lee 2018-08-11 22:13:41 -07:00
parent 3a037744de
commit eb6738053b
2 changed files with 10 additions and 0 deletions
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8
etcdserver/metrics.go
View File

@ -112,6 +112,13 @@ var (
Help: "Which Go version server is running with. 1 for 'server_go_version' label with current version.",
},
[]string{"server_go_version"})
serverID = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "id",
Help: "Server or member ID in hexadecimal format. 1 for 'server_id' label with current ID.",
},
[]string{"server_id"})
)
func init() {
@ -129,6 +136,7 @@ func init() {
prometheus.MustRegister(quotaBackendBytes)
prometheus.MustRegister(currentVersion)
prometheus.MustRegister(currentGoVersion)
prometheus.MustRegister(serverID)
currentVersion.With(prometheus.Labels{
"server_version": version.Version,

2
etcdserver/server.go
View File

@ -60,6 +60,7 @@ import (
"github.com/coreos/go-semver/semver"
"github.com/coreos/pkg/capnslog"
humanize "github.com/dustin/go-humanize"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
)
@ -511,6 +512,7 @@ func NewServer(cfg ServerConfig) (srv *EtcdServer, err error) {
forceVersionC: make(chan struct{}),
AccessController: &AccessController{CORS: cfg.CORS, HostWhitelist: cfg.HostWhitelist},
}
serverID.With(prometheus.Labels{"server_id": id.String()}).Set(1)
srv.applyV2 = &applierV2store{store: srv.v2store, cluster: srv.cluster}