From b524c0999f447d7931fcacb37e2989d3bf66ad26 Mon Sep 17 00:00:00 2001 From: Jiri Stransky Date: Wed, 21 Sep 2016 13:53:19 +0200 Subject: Provide for RAM-constrained environments We hit problems in environments which don't have a lot of RAM (e.g. dev envs, could be also CI) that Apache ate too much memory due to too many worker processes being spawned. This commit allows customizing the Apache MaxRequestWorkers and ServerLimit directives via Heat parameters. The default stays 256 as that's the default in the Puppet module, to be suited for production environments with powerful machines. Also low-memory-usage.yaml environment file is added, which can be used to make dev/test/CI overclouds less memory hungry, where the limits are now set to 32. Change-Id: Ibcf1d9c3326df8bb5b380066166c4ae3c4bf8d96 Co-Authored-By: Carlos Camacho Closes-Bug: #1619205 --- environments/low-memory-usage.yaml | 14 ++++++++++++++ puppet/services/apache.yaml | 10 ++++++++++ 2 files changed, 24 insertions(+) create mode 100644 environments/low-memory-usage.yaml diff --git a/environments/low-memory-usage.yaml b/environments/low-memory-usage.yaml new file mode 100644 index 00000000..2e496f89 --- /dev/null +++ b/environments/low-memory-usage.yaml @@ -0,0 +1,14 @@ +# Lower the memory usage of overcloud. +parameter_defaults: + CeilometerWorkers: 1 + CinderWorkers: 1 + GlanceWorkers: 1 + HeatWorkers: 1 + KeystoneWorkers: 1 + NeutronWorkers: 1 + NovaWorkers: 1 + SaharaWorkers: 1 + SwiftWorkers: 1 + + ApacheMaxRequestWorkers: 32 + ApacheServerLimit: 32 diff --git a/puppet/services/apache.yaml b/puppet/services/apache.yaml index 7595e4c3..c9792019 100644 --- a/puppet/services/apache.yaml +++ b/puppet/services/apache.yaml @@ -5,6 +5,14 @@ description: > automatically via other services which run via Apache. parameters: + ApacheMaxRequestWorkers: + default: 256 + description: Maximum number of simultaneously processed requests. + type: number + ApacheServerLimit: + default: 256 + description: Maximum number of Apache processes. + type: number ServiceNetMap: default: {} description: Mapping of service_name -> network name. Typically set @@ -38,5 +46,7 @@ outputs: template: "NETWORK_subnet" params: NETWORK: {get_param: [ServiceNetMap, ApacheNetwork]} + apache::mod::prefork::maxclients: { get_param: ApacheMaxRequestWorkers } + apache::mod::prefork::serverlimit: { get_param: ApacheServerLimit } apache::mod::remoteip::proxy_ips: - "%{hiera('apache_remote_proxy_ips_network')}" -- cgit 1.2.3-korg