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 Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
1.5.0p12	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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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