etcd

Prometheus Metrics

etcd is a distributed key-value store that provides reliable configuration storage and service discovery for distributed systems.

Prometheus Metrics

etcd exposes Prometheus metrics by default at http://localhost:2379/metrics — no additional service-side configuration is required.

For authenticated clusters, ensure Glouton can reach the metrics endpoint, or configure etcd to expose an unauthenticated metrics listener on a separate port.

Glouton Configuration

Linux

sudo tee /etc/glouton/conf.d/99-etcd.conf > /dev/null << 'EOF'
metric:
  prometheus:
    targets:
      - url: "http://localhost:2379/metrics"
        name: "etcd"
        allow_metrics:
          - "etcd_server_has_leader"
          - "etcd_server_leader_changes_seen_total"
          - "etcd_mvcc_db_total_size_in_bytes"
          - "etcd_disk_wal_fsync_duration_seconds*"
          - "etcd_network_peer_sent_bytes_total"
EOF

Windows

Create or edit C:\ProgramData\glouton\conf.d\99-etcd.conf:

metric:
  prometheus:
    targets:
      - url: "http://localhost:2379/metrics"
        name: "etcd"
        allow_metrics:
          - "etcd_server_has_leader"
          - "etcd_server_leader_changes_seen_total"
          - "etcd_mvcc_db_total_size_in_bytes"
          - "etcd_disk_wal_fsync_duration_seconds*"
          - "etcd_network_peer_sent_bytes_total"

Glouton automatically detects configuration changes.

Customize collected metrics

The metrics below are our recommended defaults. You can adjust the allow_metrics list to include any metric from etcd’s metrics reference, or use deny_metrics to exclude specific ones. See Metrics Filtering for details.

Metric	Description
etcd_server_has_leader	Indicates whether the etcd member has a leader
etcd_server_leader_changes_seen_total	Total number of leader changes observed
etcd_mvcc_db_total_size_in_bytes	Total size of the underlying database in bytes
etcd_disk_wal_fsync_duration_seconds	Histogram of WAL fsync durations in seconds
etcd_network_peer_sent_bytes_total	Total number of bytes sent to peers