Consul redis check continue printing "Check service:redis-6379-redis1 is warning now", while it's OK

[Дмитрий Ансимов]

I've set up a cluster of 4 nodes, two of them are servers with redis instances on them.

consul.json:

{
  "bootstrap_expect": 2,
  "client_addr": "0.0.0.0",
  "data_dir": "/var/lib/consul",
  "enable_syslog": true,
  "ports": {
    "dns": 8600,
    "http": 8500,
    "rpc": 8400,
    "serf_lan": 8301,
    "serf_wan": 8302,
    "server": 8300
  },
  "server": true,
  "start_join": [
    "10.0.1.2"
  ],
  "verify_incoming": false,
  "verify_outgoing": false
}

 conf.d/redis_service.json:

  "services": [


    {
      "name": "redis-6379-redis1",
      "tags": ["redis"],
      "address": "10.0.1.2",
      "port": 6379,
      "enableTagOverride": true,
      "checks": [
        {
          "script": "/usr/local/script/check_redis_6379.sh",
          "interval": "10s"
        }
      ]
    }
  ]

Redis check is trivial and was taken here. If I run it in the shell, $? is always 0.

While in consul agent logs I always see:

consul: 2016/12/17 11:41:10 [WARN] agent: Check 'service:redis-6379-redis1' is now warning

After I change redis port in the script to unexisting, $? eventually became 2, but messages in consul log are still the same.

What's wrong with my setup? Thanks in advance, comrades.

[Matt Hite]

Let me preface this with the following: I know nothing about redis.

Are you using the redis health check you linked exactly as-is?

#!/usr/bin/with-contenv sh

RESULT=`redis-cli ping`

if [ "$RESULT" = "PONG" ]; then

    exit 0

fi

exit 2

I suspect the user Consul runs as doesn't have redis-cli in its path, or does not have permissions to run said executable. Honestly, I'd clean that health check script up a bit, change the #! line to the actual path to bash, and hardcode the redis-cli path.

Good luck,

-M

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[Дмитрий Ансимов]

18 дек. 2016 г. 5:58 PM пользователь "Matt Hite" <li...@beatmixed.com> написал:

Let me preface this with the following: I know nothing about redis.

Are you using the redis health check you linked exactly as-is?

#!/usr/bin/with-contenv sh

RESULT=`redis-cli ping`

if [ "$RESULT" = "PONG" ]; then

    exit 0

fi

exit 2

I suspect the user Consul runs as doesn't have redis-cli in its path, or does not have permissions to run said executable. Honestly, I'd clean that health check script up a bit, change the #! line to the actual path to bash, and hardcode the redis-cli path.

Hi Matt, 

Thanks for your suggestion, but no, I'm using it with changed #! and full path to redis-cli executable. No use :( I'm gonna check everything once more anyway. 

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[James Phillips]

Hi,

If you take a look in "Output" field of
https://www.consul.io/docs/agent/http/health.html#health_service for
the "redis" service does that give any insight? That should have the
output of the script, as seen from the Consul agent.

-- James

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