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git-svn-id: svn+ssh://rubyforge.org/var/svn/mongrel/trunk@849 19e92222-5c0b-0410-8929-a290d50e31e9
56 lines
2.7 KiB
Text
56 lines
2.7 KiB
Text
== Mongrel Cluster Plugin
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Tool to help start/stop/restart multiple mongrel servers to use behind a load balancer like Apache 2.2 (mod_proxy_balancer), Lighttpd, Pound, Pen or Balance. This plugin adds an option to specify a number of Mongrel servers to launch, a range of ports, and a configuration file for the cluster. Use "-h" to see command syntax.
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Configure cluster and write configuration file:
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mongrel_rails cluster::configure
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Start cluster:
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mongrel_rails cluster::start
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Restart cluster:
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mongrel_rails cluster::restart
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Stop cluster:
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mongrel_rails cluster::stop
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== Capistrano Recipes
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Add to config/deploy.rb:
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require 'mongrel_cluster/recipes'
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Variables:
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mongrel_servers: Number of Mongrel servers to start.
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mongrel_port: Starting port to bind to.
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mongrel_address: Address to bind to.
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mongrel_environment: Rails environment to run as.
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mongrel_conf: Path to conf file. Defaults to /etc/mongrel_cluster/app_name.conf
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mongrel_user: User to run mongrels in cluster as. Unset by default
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mongrel_group: Group to run mongrels in cluster as. Unset by default.
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On Capistrano 2 you get then get the following tasks:
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mongrel:cluster:configure Configure the cluster with variables.
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mongrel:cluster:start: Start Mongrel processes on the app server.
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mongrel:cluster:stop: Stop the Mongrel processes on the app server.
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mongrel:cluster:restart: Restart the Mongrel processes on the app server by starting and stopping mongrel_cluster.
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deploy:restart: Calls mongrel:cluster:restart to allow Mongrel to be used with the standard Capistrano deploy task.
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deploy:start: Calls mongrel:cluster:start to allow Mongrel to be used with the standard Capistrano deploy task.
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deploy:stop: Calls mongrel:cluster:stop to allow Mongrel to be used with the standard Capistrano deploy task.
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On Capistrano 1 you get the same tasks, but without the namespace:
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configure_mongrel_cluster: Configure the cluster with variables.
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start_mongrel_cluster: Start Mongrel processes on the app server.
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stop_mongrel_cluster: Stop the Mongrel processes on the app server.
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restart_mongrel_cluster: Restart the Mongrel processes on the app server by starting and stopping mongrel_cluster.
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restart: Calls restart_mongrel_cluster to allow Mongrel to be used with the standard Capistrano deploy task.
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spinner: Calls start_mongrel_cluster to allow Mongrel to be used with the standard Capistrano cold_deploy task.
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== Starting clusters at boot
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1. Create mongrel_cluster conf directory (/etc/mongrel_cluster).
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2. Assign ownership to your Capistrano user.
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3. Copy the init.d script from this gem's resouces directory /etc/init.d.
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4. chmod +x /etc/init.d/mongrel_cluster
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5. Add to init.d startup. On RHEL/CentOS use: /sbin/chkconfig --level 345 mongrel_cluster on
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