Werk #7053: tcp_conn_stat: resolve latency problems introduced by ss

Component

Checks & agents

Title

tcp_conn_stat: resolve latency problems introduced by ss

Date

Jan 17, 2019

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

1.6.0b1	Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
1.5.0p12	Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

On some systems the ss command used for the tcp_conn_stat check introduced latency problems. To resolve this issue by default now "cat /proc/net/tcp /proc/net/tcp6" is used again. ss is only used as a fallback if cat runs into a timeout.

Additionally, the maximum waiting time for cat is reduced from 10s to 5s and SIGTERM is sent by waitmax instead of SIGHUP.

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