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authorAlexandru Avadanii <Alexandru.Avadanii@enea.com>2017-02-07 10:53:23 +0100
committerAlexandru Avadanii <Alexandru.Avadanii@enea.com>2017-02-07 11:08:13 +0100
commit8db6f978002e7a0615f4d2bdc7c6960a8d902f60 (patch)
treecf5571d7d53f215733d71459d860ad2d6308921e /patches
parent1ed607bbfac03c45502e9989fa654001639fa8c7 (diff)
Temp: fuel-library: Increase tcp_retries2 value
Change-Id: I6f7e3b291878bb20e51f8100ef3a1ede540e4736 Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
Diffstat (limited to 'patches')
-rw-r--r--patches/fuel-library/upstream-backports/0001-Increase-tcp_retries2-value.patch51
1 files changed, 51 insertions, 0 deletions
diff --git a/patches/fuel-library/upstream-backports/0001-Increase-tcp_retries2-value.patch b/patches/fuel-library/upstream-backports/0001-Increase-tcp_retries2-value.patch
new file mode 100644
index 0000000..02d0a03
--- /dev/null
+++ b/patches/fuel-library/upstream-backports/0001-Increase-tcp_retries2-value.patch
@@ -0,0 +1,51 @@
+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
+---
+ deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp | 2 +-
+ tests/noop/spec/hosts/netconfig/netconfig_spec.rb | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp b/deployment/puppet/osnailyfacter/manifests/netconfig/netconfig.pp
+index 78d5975..42579ac 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 c175aed..80ea0f2 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') }