diff options
| -rw-r--r-- | build/f_repos/patch/fuel-library/0003-Increase-tcp_retries2-value.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/build/f_repos/patch/fuel-library/0003-Increase-tcp_retries2-value.patch b/build/f_repos/patch/fuel-library/0003-Increase-tcp_retries2-value.patch new file mode 100644 index 000000000..6e750ae74 --- /dev/null +++ b/build/f_repos/patch/fuel-library/0003-Increase-tcp_retries2-value.patch @@ -0,0 +1,48 @@ +From 5d4d53082d249e1fadb31fe369f74d25caff700d Mon Sep 17 00:00:00 2001 +From: Alexey Lebedeff <alebedev@mirantis.com> +Date: Fri, 3 Feb 2017 19:13:14 +0300 +Subject: [PATCH] Increase tcp_retries2 value + +Current value of 5 results in socket operation timeout after ~12.9 +seconds. This is a bit too low, e.g. we've seen RabbitMQ network +splits in production. + +This 12.9s amount is equal as 0.2*(2^1+2^2+..2^5), where 0.2 is a +retry timeout (RTO) that is calculated by kernel on a per-socket +basis. But in fast local networks it usually almost equal to minimum +values of 0.2s hardcoded in linux kernel (and BTW, RFC says that +minimum value should be 1s). + +On the other hand, comment in netconfig.pp says that our target +timeout is ~54 seconds. And changing tcp_retries2 to 7 is consistent +with that comment - tests an live env show that resulting timeout is +~52.2s + +Change-Id: Ib52f40ef1017a9da5a29cd62fb744a4597860763 + +diff --git a/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp b/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp +index 78d59754a..42579ac60 100644 +--- a/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp ++++ b/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp +@@ -42,7 +42,7 @@ class osnailyfacter::netconfig::netconfig { + tcpka_time => '30', + tcpka_probes => '8', + tcpka_intvl => '3', +- tcp_retries2 => '5', ++ tcp_retries2 => '7', + } + + # increase network backlog for performance on fast networks +diff --git a/tests/noop/spec/hosts/netconfig/netconfig_spec.rb b/tests/noop/spec/hosts/netconfig/netconfig_spec.rb +index c175aed71..80ea0f242 100644 +--- a/tests/noop/spec/hosts/netconfig/netconfig_spec.rb ++++ b/tests/noop/spec/hosts/netconfig/netconfig_spec.rb +@@ -27,7 +27,7 @@ describe manifest do + 'tcpka_time' => '30', + 'tcpka_probes' => '8', + 'tcpka_intvl' => '3', +- 'tcp_retries2' => '5', ++ 'tcp_retries2' => '7', + ) } + it { should contain_sysctl__value('net.core.netdev_max_backlog').with('value' => '261144') } + it { should contain_class('sysfs') } |