Redis Sentinel Input Plugin

This plugin collects metrics for Redis Sentinel instances monitoring Redis servers and replicas.

Introduced in: Telegraf v1.22.0 Tags: server OS support: all

Global configuration options

In addition to the plugin-specific configuration settings, plugins support additional global and plugin configuration settings. These settings are used to modify metrics, tags, and field or create aliases and configure ordering, etc. See the CONFIGURATION.md for more details.

Configuration

# Read metrics from one or many redis-sentinel servers
[[inputs.redis_sentinel]]
  ## specify servers via a url matching:
  ##  [protocol://]()@address[:port]
  ##  e.g.
  ##    tcp://localhost:26379
  ##    tcp://username:password@192.168.99.100
  ##    unix:///var/run/redis-sentinel.sock
  ##
  ## If no servers are specified, then localhost is used as the host.
  ## If no port is specified, 26379 is used
  # servers = ["tcp://localhost:26379"]

  ## Optional TLS Config
  # tls_ca = "/etc/telegraf/ca.pem"
  # tls_cert = "/etc/telegraf/cert.pem"
  # tls_key = "/etc/telegraf/key.pem"
  ## Use TLS but skip chain & host verification
  # insecure_skip_verify = true

Metrics

The plugin gathers the results of these commands and measurements:

sentinel masters - redis_sentinel_masters
sentinel sentinels - redis_sentinels
sentinel replicas - redis_replicas
info all - redis_sentinel

The has_quorum field in redis_sentinel_masters is from calling the command sentinels ckquorum.

There are 5 remote network requests made for each server listed in the config.

redis_sentinel_masters
- tags:
  - host
  - master
  - port
  - source
- fields:
  - config_epoch (int)
  - down_after_milliseconds (int)
  - failover_timeout (int)
  - flags (string)
  - has_quorum (bool)
  - info_refresh (int)
  - ip (string)
  - last_ok_ping_reply (int)
  - last_ping_reply (int)
  - last_ping_sent (int)
  - link_pending_commands (int)
  - link_refcount (int)
  - num_other_sentinels (int)
  - num_slaves (int)
  - parallel_syncs (int)
  - port (int)
  - quorum (int)
  - role_reported (string)
  - role_reported_time (int)
redis_sentinel_sentinels
- tags:
  - host
  - master
  - port
  - sentinel_ip
  - sentinel_port
  - source
- fields:
  - down_after_milliseconds (int)
  - flags (string)
  - last_hello_message (int)
  - last_ok_ping_reply (int)
  - last_ping_reply (int)
  - last_ping_sent (int)
  - link_pending_commands (int)
  - link_refcount (int)
  - name (string)
  - voted_leader (string)
  - voted_leader_epoch (int)
redis_sentinel_replicas
- tags:
  - host
  - master
  - port
  - replica_ip
  - replica_port
  - source
- fields:
  - down_after_milliseconds (int)
  - flags (string)
  - info_refresh (int)
  - last_ok_ping_reply (int)
  - last_ping_reply (int)
  - last_ping_sent (int)
  - link_pending_commands (int)
  - link_refcount (int)
  - master_host (string)
  - master_link_down_time (int)
  - master_link_status (string)
  - master_port (int)
  - name (string)
  - role_reported (string)
  - role_reported_time (int)
  - slave_priority (int)
  - slave_repl_offset (int)
redis_sentinel
- tags:
  - host
  - port
  - source
- fields:
  - active_defrag_hits (int)
  - active_defrag_key_hits (int)
  - active_defrag_key_misses (int)
  - active_defrag_misses (int)
  - blocked_clients (int)
  - client_recent_max_input_buffer (int)
  - client_recent_max_output_buffer (int)
  - clients (int)
  - evicted_keys (int)
  - expired_keys (int)
  - expired_stale_perc (float)
  - expired_time_cap_reached_count (int)
  - instantaneous_input_kbps (float)
  - instantaneous_ops_per_sec (int)
  - instantaneous_output_kbps (float)
  - keyspace_hits (int)
  - keyspace_misses (int)
  - latest_fork_usec (int)
  - lru_clock (int)
  - migrate_cached_sockets (int)
  - pubsub_channels (int)
  - pubsub_patterns (int)
  - redis_version (string)
  - rejected_connections (int)
  - sentinel_masters (int)
  - sentinel_running_scripts (int)
  - sentinel_scripts_queue_length (int)
  - sentinel_simulate_failure_flags (int)
  - sentinel_tilt (int)
  - slave_expires_tracked_keys (int)
  - sync_full (int)
  - sync_partial_err (int)
  - sync_partial_ok (int)
  - total_commands_processed (int)
  - total_connections_received (int)
  - total_net_input_bytes (int)
  - total_net_output_bytes (int)
  - uptime_ns (int, nanoseconds)
  - used_cpu_sys (float)
  - used_cpu_sys_children (float)
  - used_cpu_user (float)
  - used_cpu_user_children (float)

Example Output

An example of 2 Redis Sentinel instances monitoring a single master and replica. It produces:

redis_sentinel_masters

redis_sentinel_masters,host=somehostname,master=mymaster,port=26380,source=localhost config_epoch=0i,down_after_milliseconds=30000i,failover_timeout=180000i,flags="master",has_quorum=1i,info_refresh=110i,ip="127.0.0.1",last_ok_ping_reply=819i,last_ping_reply=819i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,num_other_sentinels=1i,num_slaves=1i,parallel_syncs=1i,port=6379i,quorum=2i,role_reported="master",role_reported_time=311248i 1570207377000000000
redis_sentinel_masters,host=somehostname,master=mymaster,port=26379,source=localhost config_epoch=0i,down_after_milliseconds=30000i,failover_timeout=180000i,flags="master",has_quorum=1i,info_refresh=1650i,ip="127.0.0.1",last_ok_ping_reply=1003i,last_ping_reply=1003i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,num_other_sentinels=1i,num_slaves=1i,parallel_syncs=1i,port=6379i,quorum=2i,role_reported="master",role_reported_time=302990i 1570207377000000000

redis_sentinel_sentinels

redis_sentinel_sentinels,host=somehostname,master=mymaster,port=26380,sentinel_ip=127.0.0.1,sentinel_port=26379,source=localhost down_after_milliseconds=30000i,flags="sentinel",last_hello_message=1337i,last_ok_ping_reply=566i,last_ping_reply=566i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,name="fd7444de58ecc00f2685cd89fc11ff96c72f0569",voted_leader="?",voted_leader_epoch=0i 1570207377000000000
redis_sentinel_sentinels,host=somehostname,master=mymaster,port=26379,sentinel_ip=127.0.0.1,sentinel_port=26380,source=localhost down_after_milliseconds=30000i,flags="sentinel",last_hello_message=1510i,last_ok_ping_reply=1004i,last_ping_reply=1004i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,name="d06519438fe1b35692cb2ea06d57833c959f9114",voted_leader="?",voted_leader_epoch=0i 1570207377000000000

redis_sentinel_replicas

redis_sentinel_replicas,host=somehostname,master=mymaster,port=26379,replica_ip=127.0.0.1,replica_port=6380,source=localhost down_after_milliseconds=30000i,flags="slave",info_refresh=1651i,last_ok_ping_reply=1005i,last_ping_reply=1005i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,master_host="127.0.0.1",master_link_down_time=0i,master_link_status="ok",master_port=6379i,name="127.0.0.1:6380",role_reported="slave",role_reported_time=302983i,slave_priority=100i,slave_repl_offset=40175i 1570207377000000000
redis_sentinel_replicas,host=somehostname,master=mymaster,port=26380,replica_ip=127.0.0.1,replica_port=6380,source=localhost down_after_milliseconds=30000i,flags="slave",info_refresh=111i,last_ok_ping_reply=821i,last_ping_reply=821i,last_ping_sent=0i,link_pending_commands=0i,link_refcount=1i,master_host="127.0.0.1",master_link_down_time=0i,master_link_status="ok",master_port=6379i,name="127.0.0.1:6380",role_reported="slave",role_reported_time=311243i,slave_priority=100i,slave_repl_offset=40441i 1570207377000000000

redis_sentinel

redis_sentinel,host=somehostname,port=26379,source=localhost active_defrag_hits=0i,active_defrag_key_hits=0i,active_defrag_key_misses=0i,active_defrag_misses=0i,blocked_clients=0i,client_recent_max_input_buffer=2i,client_recent_max_output_buffer=0i,clients=3i,evicted_keys=0i,expired_keys=0i,expired_stale_perc=0,expired_time_cap_reached_count=0i,instantaneous_input_kbps=0.01,instantaneous_ops_per_sec=0i,instantaneous_output_kbps=0,keyspace_hits=0i,keyspace_misses=0i,latest_fork_usec=0i,lru_clock=9926289i,migrate_cached_sockets=0i,pubsub_channels=0i,pubsub_patterns=0i,redis_version="5.0.5",rejected_connections=0i,sentinel_masters=1i,sentinel_running_scripts=0i,sentinel_scripts_queue_length=0i,sentinel_simulate_failure_flags=0i,sentinel_tilt=0i,slave_expires_tracked_keys=0i,sync_full=0i,sync_partial_err=0i,sync_partial_ok=0i,total_commands_processed=459i,total_connections_received=6i,total_net_input_bytes=24517i,total_net_output_bytes=14864i,uptime_ns=303000000000i,used_cpu_sys=0.404,used_cpu_sys_children=0,used_cpu_user=0.436,used_cpu_user_children=0 1570207377000000000
redis_sentinel,host=somehostname,port=26380,source=localhost active_defrag_hits=0i,active_defrag_key_hits=0i,active_defrag_key_misses=0i,active_defrag_misses=0i,blocked_clients=0i,client_recent_max_input_buffer=2i,client_recent_max_output_buffer=0i,clients=2i,evicted_keys=0i,expired_keys=0i,expired_stale_perc=0,expired_time_cap_reached_count=0i,instantaneous_input_kbps=0.01,instantaneous_ops_per_sec=0i,instantaneous_output_kbps=0,keyspace_hits=0i,keyspace_misses=0i,latest_fork_usec=0i,lru_clock=9926289i,migrate_cached_sockets=0i,pubsub_channels=0i,pubsub_patterns=0i,redis_version="5.0.5",rejected_connections=0i,sentinel_masters=1i,sentinel_running_scripts=0i,sentinel_scripts_queue_length=0i,sentinel_simulate_failure_flags=0i,sentinel_tilt=0i,slave_expires_tracked_keys=0i,sync_full=0i,sync_partial_err=0i,sync_partial_ok=0i,total_commands_processed=442i,total_connections_received=2i,total_net_input_bytes=23861i,total_net_output_bytes=4443i,uptime_ns=312000000000i,used_cpu_sys=0.46,used_cpu_sys_children=0,used_cpu_user=0.416,used_cpu_user_children=0 1570207377000000000

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