Layer4 connection problem, info: “Connection refused at step 1 of tcp-check (connect)”

@rockandska wrote:

Hi,

Similar to #2134

Despite it is the same error and the same fix, i don’t use resolvers in my conf

# haproxy -v
HA-Proxy version 1.7.5-2 2017/05/17

backend bk_redis
  mode tcp
  option tcp-check
  #tcp-check connect     --> comment it solved the problem
  tcp-check send PING\r\n
  tcp-check expect string +PONG
  tcp-check send info\ replication\r\n
  tcp-check expect string role:master
  tcp-check send QUIT\r\n
  tcp-check expect string +OK
  server redis-1-debian-9 redis-1-debian-9:6379 check inter 1s
  server redis-2-debian-9 redis-2-debian-9:6379 check inter 1s
  server redis-3-debian-9 redis-3-debian-9:6379 check inter 1s

But when i read the doc, it clearly state that tcp-check connect is required

In a tcp-check ruleset a 'connect' is required, it is also mandatory to start
the ruleset with a 'connect' rule. Purpose is to ensure admin know what they
do.

• Why tcp-check connect fail ? bug ?
• Despite what the doc says, is it ok to remove tcp-check connect ? what is the implication of this choice ?
• Since we don’t have the problem with the exact same conf with v1.5.18 (centos7 ), could we remove it on this version too to have the same config on 1.5.18 and 1.7.5 ?

Regards,

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