| // 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 |
| } |
| } |
| } |