#!/bin/sh # # Route OCF RA. Enables and disables network routes. # # (c) 2008-2010 Florian Haas, Dejan Muhamedagic, # and Linux-HA contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of version 2 of the GNU General Public License as # published by the Free Software Foundation. # # This program is distributed in the hope that it would be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # # Further, this software is distributed without any warranty that it is # free of the rightful claim of any third person regarding infringement # or the like. Any license provided herein, whether implied or # otherwise, applies only to this software file. Patent licenses, if # any, provided herein do not apply to combinations of this program with # other software, or any other product whatsoever. # # You should have received a copy of the GNU General Public License # along with this program; if not, write the Free Software Foundation, # Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. # ####################################################################### # Initialization: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs # Default values OCF_RESKEY_device_default="" OCF_RESKEY_gateway_default="" OCF_RESKEY_source_default="" OCF_RESKEY_table_default="" OCF_RESKEY_family_default="detect" : ${OCF_RESKEY_device=${OCF_RESKEY_device_default}} : ${OCF_RESKEY_gateway=${OCF_RESKEY_gateway_default}} : ${OCF_RESKEY_source=${OCF_RESKEY_source_default}} : ${OCF_RESKEY_table=${OCF_RESKEY_table_default}} : ${OCF_RESKEY_family=${OCF_RESKEY_family_default}} ####################################################################### meta_data() { cat < 1.0 Enables and disables network routes. Supports host and net routes, routes via a gateway address, and routes using specific source addresses. This resource agent is useful if a node's routing table needs to be manipulated based on node role assignment. Consider the following example use case: - One cluster node serves as an IPsec tunnel endpoint. - All other nodes use the IPsec tunnel to reach hosts in a specific remote network. Then, here is how you would implement this scheme making use of the Route resource agent: - Configure an ipsec LSB resource. - Configure a cloned Route OCF resource. - Create an order constraint to ensure that ipsec is started before Route. - Create a colocation constraint between the ipsec and Route resources, to make sure no instance of your cloned Route resource is started on the tunnel endpoint itself. Manages network routes The destination network (or host) to be configured for the route. Specify the netmask suffix in CIDR notation (e.g. "/24"). If no suffix is given, a host route will be created. Specify "0.0.0.0/0" or "default" if you want this resource to set the system default route. Destination network The outgoing network device to use for this route. Outgoing network device The gateway IP address to use for this route. Gateway IP address The source IP address to be configured for the route. Source IP address The routing table to be configured for the route. Routing table The address family to be used for the route ip4 IP version 4 ip6 IP version 6 detect Detect from 'destination' address. Address Family END } ####################################################################### create_route_spec() { # Creates a route specification for use by "ip route (add|del|show)" route_spec="to ${OCF_RESKEY_destination}" if [ -n "${OCF_RESKEY_device}" ]; then route_spec="${route_spec} dev ${OCF_RESKEY_device}" fi if [ -n "${OCF_RESKEY_gateway}" ]; then route_spec="${route_spec} via ${OCF_RESKEY_gateway}" fi if [ -n "${OCF_RESKEY_source}" ]; then route_spec="${route_spec} src ${OCF_RESKEY_source}" fi if [ -n "${OCF_RESKEY_table}" ]; then route_spec="${route_spec} table ${OCF_RESKEY_table}" fi echo "$route_spec" } route_usage() { cat </dev/null 2>&1 if [ $? -ne 0 ]; then # Assume device does not exist, and short-circuit here. return $OCF_NOT_RUNNING fi fi show_output="$(ip $addr_family route show $(create_route_spec) 2>/dev/null)" if [ $? -eq 0 ]; then if [ -n "$show_output" ]; then # "ip route show" returned zero, and produced output on # stdout. That is what we expect. return $OCF_SUCCESS else # "ip route show" returned zero, but produced no # output on stdout. Assume the route was cleanly # unconfigured. return $OCF_NOT_RUNNING fi else # "ip route show" returned an error code. Assume something # went wrong. return $OCF_ERR_GENERIC fi } route_validate() { # If we're running as a clone, are the clone meta attrs OK? if [ "${OCF_RESKEY_CRM_meta_clone}" ]; then if [ "${OCF_RESKEY_CRM_meta_clone_node_max}" != 1 ]; then ocf_exit_reason "Misconfigured clone parameters. Must set meta attribute \"clone_node_max\" to 1, got ${OCF_RESKEY_CRM_meta_clone_node_max}." return $OCF_ERR_CONFIGURED fi fi # Did we get a destination? if [ -z "${OCF_RESKEY_destination}" ]; then ocf_exit_reason "Missing required parameter \"destination\"." return $OCF_ERR_CONFIGURED fi # Did we get either a device or a gateway address? if [ -z "${OCF_RESKEY_device}" -a -z "${OCF_RESKEY_gateway}" ]; then ocf_exit_reason "Must specify either \"device\", or \"gateway\", or both." return $OCF_ERR_CONFIGURED fi # If a device has been configured, is it available on this system? if [ -n "${OCF_RESKEY_device}" ]; then if ! ip link show ${OCF_RESKEY_device} >/dev/null 2>&1; then ocf_exit_reason "Network device ${OCF_RESKEY_device} appears not to be available on this system." # OCF_ERR_ARGS prevents the resource from running anywhere at all, # maybe another node has the interface? # OCF_ERR_INSTALLED just prevents starting on this particular node. return $OCF_ERR_INSTALLED fi fi # The following tests must return $OCF_ERR_INSTALLED, but only if # the resource is actually running (i.e., not during probes) if ! ocf_is_probe; then # If a source address has been configured, is it available on # this system? if [ -n "${OCF_RESKEY_source}" ]; then if ! ip address show | grep -w ${OCF_RESKEY_source} >/dev/null 2>&1; then ocf_exit_reason "Source address ${OCF_RESKEY_source} appears not to be available on this system." # same reason as with _device: return $OCF_ERR_INSTALLED fi fi # If a gateway address has been configured, is it reachable? if [ -n "${OCF_RESKEY_gateway}" ]; then if ! ip route get ${OCF_RESKEY_gateway} >/dev/null 2>&1; then ocf_exit_reason "Gateway address ${OCF_RESKEY_gateway} is unreachable." # same reason as with _device: return $OCF_ERR_INSTALLED fi fi fi return $OCF_SUCCESS } # These two actions must always succeed case $__OCF_ACTION in meta-data) meta_data # OCF variables are not set when querying meta-data exit 0 ;; usage|help) route_usage exit $OCF_SUCCESS ;; esac # Don't do anything if the necessary utilities aren't present for binary in ip grep; do check_binary $binary done case $OCF_RESKEY_family in ip4) addr_family="-4" ;; ip6) addr_family="-6" ;; detect) case $OCF_RESKEY_destination in *:*) addr_family="-6" ;; *.*) addr_family="-4" ;; *) ocf_exit_reason "Address family detection requires a numeric destination address." ;; esac ;; *) ocf_exit_reason "Address family '${OCF_RESKEY_family}' not recognized." ;; esac case $__OCF_ACTION in start) route_start;; stop) route_stop;; status|monitor) route_status;; reload) ocf_log info "Reloading..." route_start ;; validate-all) route_validate;; *) route_usage exit $OCF_ERR_UNIMPLEMENTED ;; esac rc=$? ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION returned $rc" exit $rc