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metrics.go
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metrics.go
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// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package etcdserver
import (
"time"
"github.com/coreos/etcd/pkg/runtime"
"github.com/prometheus/client_golang/prometheus"
)
var (
hasLeader = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "has_leader",
Help: "Whether or not a leader exists. 1 is existence, 0 is not.",
})
leaderChanges = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "leader_changes_seen_total",
Help: "The number of leader changes seen.",
})
proposalsCommitted = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "proposals_committed_total",
Help: "The total number of consensus proposals committed.",
})
proposalsApplied = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "proposals_applied_total",
Help: "The total number of consensus proposals applied.",
})
proposalsPending = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "proposals_pending",
Help: "The current number of pending proposals to commit.",
})
proposalsFailed = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "etcd",
Subsystem: "server",
Name: "proposals_failed_total",
Help: "The total number of failed proposals seen.",
})
leaseExpired = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "etcd_debugging",
Subsystem: "server",
Name: "lease_expired_total",
Help: "The total number of expired leases.",
})
)
func init() {
prometheus.MustRegister(hasLeader)
prometheus.MustRegister(leaderChanges)
prometheus.MustRegister(proposalsCommitted)
prometheus.MustRegister(proposalsApplied)
prometheus.MustRegister(proposalsPending)
prometheus.MustRegister(proposalsFailed)
prometheus.MustRegister(leaseExpired)
}
func monitorFileDescriptor(done <-chan struct{}) {
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
for {
used, err := runtime.FDUsage()
if err != nil {
plog.Errorf("cannot monitor file descriptor usage (%v)", err)
return
}
limit, err := runtime.FDLimit()
if err != nil {
plog.Errorf("cannot monitor file descriptor usage (%v)", err)
return
}
if used >= limit/5*4 {
plog.Warningf("80%% of the file descriptor limit is used [used = %d, limit = %d]", used, limit)
}
select {
case <-ticker.C:
case <-done:
return
}
}
}