574 lines
17 KiB
Bash
Executable File
574 lines
17 KiB
Bash
Executable File
#!/bin/bash
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#
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# Resource script for haproxy daemon with namespace support
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#
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# Description: Manages haproxy daemon as an OCF resource in
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# an High Availability setup inside a namespace
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#
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# HAProxy OCF script's Author: Mirantis
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# License: GNU General Public License (GPL)
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#
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# usage: $0 {start|stop|restart|status|monitor|validate-all|meta-data}
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#
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# The "start" arg starts haproxy.
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#
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# The "stop" arg stops it.
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#
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# OCF parameters:
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# OCF_RESKEY_ns
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# OCF_RESKEY_conffile
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# OCF_RESKEY_pidfile
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# OCF_RESKEY_binpath
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# OCF_RESKEY_extraconf
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#
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# OCF_RESKEY_host_interface
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# OCF_RESKEY_namespace_interface
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# OCF_RESKEY_host_ip
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# OCF_RESKEY_namespace_ip
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# OCF_RESKEY_network_mask
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# OCF_RESKEY_route_metric
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#
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# Note: This RA requires that the haproxy config files has a "pidfile"
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# entry so that it is able to act on the correct process
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##########################################################################
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# Initialization:
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OCF_ROOT_default="/usr/lib/ocf"
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OCF_RESKEY_ns_default="haproxy"
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OCF_RESKEY_conffile_default="/etc/haproxy/haproxy.cfg"
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OCF_RESKEY_pidfile_default="${HA_RSCTMP}/${__SCRIPT_NAME}/${__SCRIPT_NAME}.pid"
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OCF_RESKEY_binpath_default="/usr/sbin/haproxy"
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OCF_RESKEY_extraconf_default=""
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OCF_RESKEY_other_networks_default=""
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OCF_RESKEY_host_interface_default="hapr-host"
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OCF_RESKEY_namespace_interface_default="hapr-ns"
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OCF_RESKEY_host_ip_default="240.0.0.1"
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OCF_RESKEY_namespace_ip_default="240.0.0.2"
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OCF_RESKEY_network_mask_default="30"
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OCF_RESKEY_route_metric_default="10000"
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OCF_RESKEY_debug_default=false
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: ${OCF_ROOT=${OCF_ROOT_default}}
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: ${HA_LOGTAG="ocf-ns_haproxy"}
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: ${HA_LOGFACILITY="daemon"}
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: ${OCF_RESKEY_ns=${OCF_RESKEY_ns_default}}
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: ${OCF_RESKEY_conffile=${OCF_RESKEY_conffile_default}}
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: ${OCF_RESKEY_pidfile=${OCF_RESKEY_pidfile_default}}
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: ${OCF_RESKEY_binpath=${OCF_RESKEY_binpath_default}}
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: ${OCF_RESKEY_extraconf=${OCF_RESKEY_extraconf_default}}
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: ${OCF_RESKEY_other_networks=${OCF_RESKEY_other_networks_default}}
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: ${OCF_RESKEY_host_interface=${OCF_RESKEY_host_interface_default}}
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: ${OCF_RESKEY_namespace_interface=${OCF_RESKEY_namespace_interface_default}}
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: ${OCF_RESKEY_host_ip=${OCF_RESKEY_host_ip_default}}
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: ${OCF_RESKEY_namespace_ip=${OCF_RESKEY_namespace_ip_default}}
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: ${OCF_RESKEY_network_mask=${OCF_RESKEY_network_mask_default}}
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: ${OCF_RESKEY_route_metric=${OCF_RESKEY_route_metric_default}}
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: ${OCF_RESKEY_debug=${OCF_RESKEY_debug_default}}
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: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/resource.d/heartbeat}
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. ${OCF_FUNCTIONS_DIR}/.ocf-shellfuncs
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USAGE="Usage: $0 {start|stop|restart|status|monitor|validate-all|meta-data}";
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RUN_IN_NS="ip netns exec $OCF_RESKEY_ns "
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if [[ -z $OCF_RESKEY_ns ]] ; then
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RUN=''
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else
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RUN="$RUN_IN_NS "
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fi
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##########################################################################
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usage()
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{
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echo $USAGE >&2
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}
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meta_data()
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{
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cat <<END
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<?xml version="1.0"?>
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<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
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<resource-agent name="haproxy">
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<version>1.0</version>
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<longdesc lang="en">
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This script manages haproxy daemon with namespace support
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</longdesc>
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<shortdesc lang="en">Manages an haproxy daemon inside an namespace</shortdesc>
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<parameters>
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<parameter name="dummy" unique="1">
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<longdesc lang="en">
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This is a dummy parameter.
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Pacemaker needs it to enable reload operation for the resource
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</longdesc>
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<shortdesc lang="en">Dummy parameter</shortdesc>
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<content type="boolean" default="false" />
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</parameter>
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<parameter name="ns">
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<longdesc lang="en">
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Name of network namespace.
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Should be present.
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</longdesc>
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<shortdesc lang="en">Name of network namespace.</shortdesc>
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<content type="string" default="${OCF_RESKEY_ns_default}"/>
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</parameter>
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<parameter name="conffile">
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<longdesc lang="en">
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The haproxy daemon configuration file name with full path.
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For example, "/etc/haproxy/haproxy.cfg"
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</longdesc>
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<shortdesc lang="en">Configuration file name with full path</shortdesc>
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<content type="string" default="${OCF_RESKEY_conffile_default}" />
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</parameter>
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<parameter name="pidfile">
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<longdesc lang="en">
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The haproxy pid file path.
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For example, "/var/run/haproxy.pid"
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</longdesc>
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<shortdesc lang="en">Full path to the haproxy pid file</shortdesc>
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<content type="string" default="${OCF_RESKEY_pidfile_default}"/>
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</parameter>
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<parameter name="binpath">
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<longdesc lang="en">
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The haproxy binary path.
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For example, "/usr/sbin/haproxy"
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</longdesc>
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<shortdesc lang="en">Full path to the haproxy binary</shortdesc>
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<content type="string" default="${OCF_RESKEY_binpath_default}"/>
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</parameter>
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<parameter name="extraconf">
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<longdesc lang="en">
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Extra command line arguments to pass to haproxy.
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For example, "-f /etc/haproxy/shared.cfg"
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</longdesc>
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<shortdesc lang="en">Extra command line arguments for haproxy</shortdesc>
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<content type="string" default="${OCF_RESKEY_extraconf_default}" />
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</parameter>
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<parameter name="other_networks">
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<longdesc lang="en">
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Additional routes that should be added to this resource. Routes will be added via value namespace_interface.
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</longdesc>
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<shortdesc lang="en">List of addtional routes to add routes for.</shortdesc>
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<content type="string" default="$OCF_RESKEY_other_networks_default"/>
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</parameter>
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<parameter name="host_interface">
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<longdesc lang="en">
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The host part of the interface pair used to connect the namespace to the network
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For example, "hapr-host"
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</longdesc>
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<shortdesc lang="en">The name of the host interface used for namespace</shortdesc>
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<content type="string" default="${OCF_RESKEY_host_interface_default}" />
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</parameter>
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<parameter name="namespace_interface">
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<longdesc lang="en">
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The namespace part of the interface pair used to connect the namespace to the network
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For example, "hapr-ns"
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</longdesc>
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<shortdesc lang="en">The name of the namespace interface used for namespace</shortdesc>
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<content type="string" default="${OCF_RESKEY_namespace_interface_default}" />
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</parameter>
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<parameter name="host_ip">
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<longdesc lang="en">
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The IP address used by the host interface. Must be from the same subnet as namesapce IP
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and uses network_mask to determine subnet.
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Should not collide with any IP addresses already used in your network.
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For example, "240.0.0.1"
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</longdesc>
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<shortdesc lang="en">Host interface IP address</shortdesc>
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<content type="string" default="${OCF_RESKEY_host_ip_default}" />
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</parameter>
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<parameter name="namespace_ip">
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<longdesc lang="en">
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The IP address used by the namespace interface. Must be from the same subnet as host IP
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and uses network_mask to determine subnet.
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Should not collide with any IP addresses already used in your network.
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For example, "240.0.0.2"
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</longdesc>
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<shortdesc lang="en">Namespace interface IP address</shortdesc>
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<content type="string" default="${OCF_RESKEY_namespace_ip_default}" />
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</parameter>
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<parameter name="network_mask">
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<longdesc lang="en">
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The network mask length used to determine subnet of the host
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and the namspace interfaces.
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For example, "30"
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</longdesc>
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<shortdesc lang="en">Network mask length</shortdesc>
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<content type="string" default="${OCF_RESKEY_network_mask_default}" />
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</parameter>
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<parameter name="route_metric">
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<longdesc lang="en">
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The metric value of the default route set for the pipe
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link connecting namespace and host. It should be set to
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a large number to be higher then other default route metrics
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that could be set to override this default route.
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If other routes are set eithin the namespace thir metric should
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be smaller then this number if you want them to be used istead of
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this route.
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For example, "1000"
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</longdesc>
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<shortdesc lang="en">Namespace default route metric</shortdesc>
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<content type="string" default="${OCF_RESKEY_route_metric_default}" />
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</parameter>
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<parameter name="debug" unique="0" required="0">
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<longdesc lang="en">
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The debug flag for haproxy.
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</longdesc>
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<shortdesc lang="en">HAProxy RA debug flag</shortdesc>
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<content type="boolean" default="${OCF_RESKEY_debug_default}" />
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</parameter>
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</parameters>
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<actions>
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<action name="start" timeout="20s"/>
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<action name="stop" timeout="20s"/>
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<action name="reload" timeout="20s"/>
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<action name="monitor" depth="0" timeout="20s" interval="60s" />
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<action name="validate-all" timeout="20s"/>
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<action name="meta-data" timeout="5s"/>
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</actions>
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</resource-agent>
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END
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exit $OCF_SUCCESS
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}
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check_ns() {
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local LH="${LL} check_ns():"
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local ns=`ip netns list | grep "$OCF_RESKEY_ns"`
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ocf_log debug "${LH} recieved netns list: ${ns}"
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[[ $ns != $OCF_RESKEY_ns ]] && return $OCF_ERR_GENERIC
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return $OCF_SUCCESS
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}
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get_ns() {
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local rc
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local LH="${LL} get_ns():"
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check_ns && return $OCF_SUCCESS
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ocf_run ip netns add $OCF_RESKEY_ns
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rc=$?
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ocf_run $RUN_IN_NS /sbin/sysctl -w net.ipv4.ip_nonlocal_bind=1
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ocf_run $RUN_IN_NS ip link set up dev lo
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ocf_log debug "${LH} added netns ${OCF_RESKEY_ns} and set up lo"
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return $rc
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}
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get_variables() {
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local LH="${LL} get_variables():"
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get_ns
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CONF_FILE="${OCF_RESKEY_conffile}"
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COMMAND="$RUN ${OCF_RESKEY_binpath}"
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if [ -n "${OCF_RESKEY_pidfile}" ]; then
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PIDFILE=$(grep -v "#" ${CONF_FILE} | grep "pidfile" | sed 's/^[ \t]*pidfile[ \t]*//')
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else
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PIDFILE="${OCF_RESKEY_pidfile}"
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fi
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ocf_log debug "${LH} set up variables and PIDFILE name"
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}
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set_ns_routing() {
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nsip() {
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ip netns exec "${OCF_RESKEY_ns}" ip ${@}
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}
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# create host-ns veth pair unless it's present
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ip link | grep -q -w "${OCF_RESKEY_host_interface}:"
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if [ $? -gt 0 ]; then
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ocf_log debug "Creating host interface: ${OCF_RESKEY_host_interface} and namespace interface: ${OCF_RESKEY_namespace_interface}"
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ocf_run ip link add "${OCF_RESKEY_host_interface}" type veth peer name "${OCF_RESKEY_namespace_interface}"
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fi
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# move the ns part to the namespace
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ip link | grep -q -w "${OCF_RESKEY_namespace_interface}:"
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if [ $? -eq 0 ]; then
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ocf_log debug "Moving interface: ${OCF_RESKEY_namespace_interface} to namespace: ${OCF_RESKEY_ns}"
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ocf_run ip link set dev "${OCF_RESKEY_namespace_interface}" netns "${OCF_RESKEY_ns}"
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fi
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# up the host part
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ocf_log debug "Bringing up host interface: ${OCF_RESKEY_host_interface}"
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ocf_run ip link set "${OCF_RESKEY_host_interface}" up
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# set host part's ip
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ip addr show dev "${OCF_RESKEY_host_interface}" | grep -q "inet ${OCF_RESKEY_host_ip}/${OCF_RESKEY_network_mask}"
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if [ $? -gt 0 ]; then
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ocf_log debug "Setting host interface: ${OCF_RESKEY_host_interface} IP to: ${OCF_RESKEY_host_ip}/${OCF_RESKEY_network_mask}"
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ocf_run ip addr add "${OCF_RESKEY_host_ip}/${OCF_RESKEY_network_mask}" dev "${OCF_RESKEY_host_interface}"
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fi
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# up the ns part
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ocf_log debug "Bringing up the namespace interface: ${OCF_RESKEY_namespace_interface}"
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ocf_run nsip link set "${OCF_RESKEY_namespace_interface}" up
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# set ns part's ip
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nsip addr show dev "${OCF_RESKEY_namespace_interface}" | grep -q "inet ${OCF_RESKEY_namespace_ip}/${OCF_RESKEY_network_mask}"
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if [ $? -gt 0 ]; then
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ocf_log debug "Setting namespace interface: ${OCF_RESKEY_namespace_interface} IP to: ${OCF_RESKEY_namespace_ip}/${OCF_RESKEY_network_mask}"
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ocf_run nsip addr add "${OCF_RESKEY_namespace_ip}/${OCF_RESKEY_network_mask}" dev "${OCF_RESKEY_namespace_interface}"
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fi
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# set default gateway inside ns
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nsip route list | grep -q "default via ${OCF_RESKEY_host_ip}"
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if [ $? -gt 0 ]; then
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ocf_log debug "Creating default route inside the namespace to ${OCF_RESKEY_host_ip} with metric ${OCF_RESKEY_route_metric}"
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ocf_run nsip route add default via "${OCF_RESKEY_host_ip}" metric "${OCF_RESKEY_route_metric}"
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fi
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# set masquerade on host node
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iptables -n -t nat -L | grep -q masquerade-for-haproxy-namespace
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if [ $? -gt 0 ]; then
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ocf_log debug "Creating NAT rule on the host system for traffic from IP: ${OCF_RESKEY_namespace_ip}"
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ocf_run iptables -t nat -A POSTROUTING -s "${OCF_RESKEY_namespace_ip}" -j MASQUERADE -m comment --comment "masquerade-for-haproxy-namespace"
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fi
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### Needed for ML2 routing ###
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ocf_run sysctl -w net.ipv4.conf.${OCF_RESKEY_host_interface}.rp_filter=2
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ocf_run $RUN_IN_NS sysctl -w net.ipv4.conf.all.rp_filter=2
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##############################
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if [[ "${OCF_RESKEY_other_networks}" != "false" ]] ; then
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for network in ${OCF_RESKEY_other_networks}
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do
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ocf_log debug "Adding route on the host system to ${network}: ${OCF_RESKEY_namespace_ip}"
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ocf_run $RUN_IN_NS ip route replace ${network} via ${OCF_RESKEY_host_ip} metric 10000
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done
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fi
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}
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haproxy_status() {
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get_variables
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# check and make PID file dir
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local PID_DIR="$( dirname ${PIDFILE} )"
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if [ ! -d "${PID_DIR}" ] ; then
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ocf_log debug "Create pid file dir: ${PID_DIR}"
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mkdir -p "${PID_DIR}"
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# no need to chown, root is user for haproxy
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chmod 755 "${PID_DIR}"
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fi
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if [ -n "${PIDFILE}" -a -f "${PIDFILE}" ]; then
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# haproxy is probably running
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# get pid from pidfile
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PID="`cat ${PIDFILE}`"
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if [ -n "${PID}" ]; then
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# check if process exists
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if $RUN ps -p "${PID}" | grep -q haproxy; then
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ocf_log info "haproxy daemon running"
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return $OCF_SUCCESS
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else
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ocf_log warn "haproxy daemon is not running but pid file exists"
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return $OCF_NOT_RUNNING
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fi
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else
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ocf_log err "PID file empty!"
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return $OCF_ERR_GENERIC
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fi
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fi
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# haproxy is not running
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ocf_log info "haproxy daemon is not running"
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return $OCF_NOT_RUNNING
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}
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haproxy_start()
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{
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get_variables
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# if haproxy is running return success
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haproxy_status
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retVal=$?
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if [ $retVal -eq $OCF_SUCCESS ]; then
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return $OCF_SUCCESS
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elif [ $retVal -ne $OCF_NOT_RUNNING ]; then
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ocf_log err "Error. Unknown status."
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return $OCF_ERR_GENERIC
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fi
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# run the haproxy binary
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ocf_run ${COMMAND} ${OCF_RESKEY_extraconf} -f "${CONF_FILE}" -p "${PIDFILE}"
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if [ $? -ne 0 ]; then
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ocf_log err "Error. haproxy daemon returned error $?."
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return $OCF_ERR_GENERIC
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fi
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if [ "${OCF_RESKEY_ns}" != '' ]; then
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set_ns_routing
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fi
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ocf_log info "Started haproxy daemon."
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return $OCF_SUCCESS
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}
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haproxy_reload()
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{
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get_variables
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if haproxy_status; then
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# get pid from pidfile
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PID="`cat ${PIDFILE}`"
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# reload haproxy binary replacing the old process
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ocf_run ${COMMAND} ${OCF_RESKEY_extraconf} -f "${CONF_FILE}" -p "${PIDFILE}" -sf "${PID}"
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if [ $? -ne 0 ]; then
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ocf_log err "Error. haproxy daemon returned error $?."
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return $OCF_ERR_GENERIC
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fi
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else
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ocf_log info "Haproxy daemon is not running. Starting it."
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haproxy_start
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fi
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}
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# Try to kill (SIGTERM) specified pid 5 times by 2 sec interval
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haproxy_kill()
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{
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local rc
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local PID="$1"
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local count=5
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local LH="${LL} haproxy_kill():"
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local pgrp=$(ps -o pgid= ${pid} | tr -d '[[:space:]]')
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while [ $count -gt 0 ]; do
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if [ -d /proc/${PID}/ ]; then
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ocf_log debug "${LH} Stopping haproxy daemon with SIGTERM... "
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ocf_run pkill -g "${pgrp}"
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if [ ! -d /proc/${PID}/ ]; then
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ocf_log debug "${LH} Stopped haproxy daemon with SIGTERM"
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return 0
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fi
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else
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|
return 0
|
|
fi
|
|
sleep 2
|
|
count=$(( count-1 ))
|
|
done
|
|
ocf_log debug "${LH} Failed to stop haproxy daemon with SIGTERM"
|
|
return 1
|
|
}
|
|
|
|
haproxy_stop()
|
|
{
|
|
local rc
|
|
local LH="${LL} haproxy_stop():"
|
|
get_variables
|
|
local pid=$(cat $PIDFILE 2>/dev/null)
|
|
local pgrp=$(ps -o pgid= ${pid} | tr -d '[[:space:]]')
|
|
if haproxy_status ; then
|
|
if [ -z "${pid}" -o "${pgrp}" -eq "1" -o ! -d /proc/${pid}/ ]; then
|
|
ocf_log err "${LH} Cannot stop haproxy (PID=${pid})"
|
|
return $OCF_ERR_GENERIC
|
|
fi
|
|
haproxy_kill "${pid}"
|
|
rc=$?
|
|
if [ $rc -ne 0 -a -d /proc/${pid}/ ]; then
|
|
ocf_run pkill -SIGKILL -g "${pgrp}"
|
|
ocf_log err "${LH} Failed to stop haproxy daemon gracefully. Killed with SIGKILL"
|
|
rc=$?
|
|
if [ $rc -ne 0 ]; then
|
|
ocf_log err "${LH} Error. Could not stop haproxy daemon."
|
|
return $OCF_ERR_GENERIC
|
|
fi
|
|
fi
|
|
ocf_log debug "Delete pid file: ${PIDFILE} with content ${pgrp}"
|
|
rm -f "${PIDFILE}"
|
|
fi
|
|
ocf_log info "Stopped haproxy daemon."
|
|
return $OCF_SUCCESS
|
|
}
|
|
|
|
haproxy_monitor()
|
|
{
|
|
haproxy_status
|
|
}
|
|
|
|
haproxy_validate_all()
|
|
{
|
|
get_variables
|
|
if [ -n "$OCF_RESKEY_binpath" -a ! -x "$OCF_RESKEY_binpath" ]; then
|
|
ocf_log err "Binary path $OCF_RESKEY_binpath does not exist."
|
|
return $OCF_ERR_ARGS
|
|
fi
|
|
if [ -n "$OCF_RESKEY_conffile" -a ! -f "$OCF_RESKEY_conffile" ]; then
|
|
ocf_log err "Config file $OCF_RESKEY_conffile does not exist."
|
|
return $OCF_ERR_ARGS
|
|
fi
|
|
|
|
if grep -v "^#" "$CONF_FILE" | grep "pidfile" > /dev/null ; then
|
|
:
|
|
else
|
|
ocf_log err "Error. \"pidfile\" entry required in the haproxy config file by haproxy OCF RA."
|
|
return $OCF_ERR_GENERIC
|
|
fi
|
|
|
|
return $OCF_SUCCESS
|
|
}
|
|
|
|
haproxy_restart()
|
|
{
|
|
haproxy_stop
|
|
haproxy_start
|
|
}
|
|
|
|
#
|
|
# Main
|
|
#
|
|
|
|
if [ $# -ne 1 ]; then
|
|
usage
|
|
exit $OCF_ERR_ARGS
|
|
fi
|
|
umask 0022
|
|
export LL="${OCF_RESOURCE_INSTANCE}:"
|
|
|
|
case $1 in
|
|
start) haproxy_start
|
|
;;
|
|
|
|
stop) haproxy_stop
|
|
;;
|
|
|
|
reload) haproxy_reload
|
|
;;
|
|
|
|
restart) haproxy_restart
|
|
;;
|
|
|
|
status) haproxy_status
|
|
;;
|
|
|
|
monitor) haproxy_monitor
|
|
;;
|
|
|
|
validate-all) haproxy_validate_all
|
|
;;
|
|
|
|
meta-data) meta_data
|
|
;;
|
|
|
|
usage) usage; exit $OCF_SUCCESS
|
|
;;
|
|
|
|
*) usage; exit $OCF_ERR_UNIMPLEMENTED
|
|
;;
|
|
esac
|