diff --git a/heartbeat/VirtualDomain b/heartbeat/VirtualDomain index 00916c0cc..dd8565792 100755 --- a/heartbeat/VirtualDomain +++ b/heartbeat/VirtualDomain @@ -1,554 +1,556 @@ #!/bin/sh # # Support: linux-ha@lists.linux-ha.org # License: GNU General Public License (GPL) # # Resource Agent for domains managed by the libvirt API. # Requires a running libvirt daemon (libvirtd). # # (c) 2008-2010 Florian Haas, Dejan Muhamedagic, # and Linux-HA contributors # # usage: $0 {start|stop|status|monitor|migrate_to|migrate_from|meta-data|validate-all} # ####################################################################### # Initialization: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs # Defaults OCF_RESKEY_force_stop_default=0 OCF_RESKEY_hypervisor_default="$(virsh --quiet uri)" OCF_RESKEY_autoset_utilization_cpu_default="true" OCF_RESKEY_autoset_utilization_hv_memory_default="true" : ${OCF_RESKEY_force_stop=${OCF_RESKEY_force_stop_default}} : ${OCF_RESKEY_hypervisor=${OCF_RESKEY_hypervisor_default}} : ${OCF_RESKEY_autoset_utilization_cpu=${OCF_RESKEY_autoset_utilization_cpu_default}} : ${OCF_RESKEY_autoset_utilization_hv_memory=${OCF_RESKEY_autoset_utilization_hv_memory_default}} ####################################################################### ## I'd very much suggest to make this RA use bash, ## and then use magic $SECONDS. ## But for now: NOW=$(date +%s) usage() { echo "usage: $0 {start|stop|status|monitor|migrate_to|migrate_from|meta-data|validate-all}" } meta_data() { cat < 1.1 Resource agent for a virtual domain (a.k.a. domU, virtual machine, virtual environment etc., depending on context) managed by libvirtd. Manages virtual domains through the libvirt virtualization framework Absolute path to the libvirt configuration file, for this virtual domain. Virtual domain configuration file Hypervisor URI to connect to. See the libvirt documentation for details on supported URI formats. The default is system dependent. Hypervisor URI Always forcefully shut down ("destroy") the domain on stop. The default behavior is to resort to a forceful shutdown only after a graceful shutdown attempt has failed. You should only set this to true if your virtual domain (or your virtualization backend) does not support graceful shutdown. Always force shutdown on stop Transport used to connect to the remote hypervisor while migrating. Please refer to the libvirt documentation for details on transports available. If this parameter is omitted, the resource will use libvirt's default transport to connect to the remote hypervisor. Remote hypervisor transport Use a dedicated migration network. The migration URI is composed by adding this parameters value to the end of the node name. If the node name happens to be an FQDN (as opposed to an unqualified host name), insert the suffix immediately prior to the first period (.) in the FQDN. At the moment Qemu/KVM and Xen migration via a dedicated network is supported. Note: Be sure this composed host name is locally resolveable and the associated IP is reachable through the favored network. Migration network host name suffix To additionally monitor services within the virtual domain, add this parameter with a list of scripts to monitor. Note: when monitor scripts are used, the start and migrate_from operations will complete only when all monitor scripts have completed successfully. Be sure to set the timeout of these operations to accommodate this delay. space-separated list of monitor scripts If set true, the agent will detect the number of domainU's vCPUs from virsh, and put it into the cpu utilization of the resource when the monitor is executed. Enable auto setting the cpu utilization of the resource If set true, the agent will detect the number of *Max memory* from virsh, and put it into the hv_memory utilization of the resource when the monitor is executed. Enable auto setting the hv_memory utilization of the resource EOF } set_util_attr() { local attr=$1 val=$2 local cval outp cval=$(crm_resource -Q -r $OCF_RESOURCE_INSTANCE -z -g $attr 2>/dev/null) if [ "$cval" != "$val" ]; then outp=`crm_resource -r $OCF_RESOURCE_INSTANCE -z -p $attr -v $val 2>&1` || ocf_log warn "crm_resource failed to set utilization attribute $attr: $outp" fi } update_utilization() { local dom_cpu dom_mem if ocf_is_true "$OCF_RESKEY_autoset_utilization_cpu"; then dom_cpu=$(LANG=C virsh $VIRSH_OPTIONS dominfo ${DOMAIN_NAME} | awk '/CPU\(s\)/{print $2}') test -n "$dom_cpu" && set_util_attr cpu $dom_cpu fi if ocf_is_true "$OCF_RESKEY_autoset_utilization_hv_memory"; then dom_mem=$(LANG=C virsh $VIRSH_OPTIONS dominfo ${DOMAIN_NAME} | awk '/Max memory/{printf("%d", $3/1024)}') test -n "$dom_mem" && set_util_attr hv_memory "$dom_mem" fi } # Set options to be passed to virsh: VIRSH_OPTIONS="--connect=${OCF_RESKEY_hypervisor} --quiet" # A state file where we record the domain name: STATEFILE="${HA_RSCTMP}/VirtualDomain-${OCF_RESOURCE_INSTANCE}.state" VirtualDomain_Define() { local virsh_output local domain_name # Note: passing in the domain name from outside the script is # intended for testing and debugging purposes only. Don't do this # in production, instead let the script figure out the domain name # from the config file. You have been warned. if [ -z "$DOMAIN_NAME" ]; then # Spin until we have a domain name while true; do virsh_output=`virsh ${VIRSH_OPTIONS} define ${OCF_RESKEY_config}` domain_name=`echo "$virsh_output" | sed -e 's/Domain \(.*\) defined from .*$/\1/'` if [ -n "$domain_name" ]; then break; fi ocf_log debug "Domain not defined yet, probably unable to connect to hypervisor. Retrying." sleep 1 done echo "$domain_name" > $STATEFILE ocf_log info "Domain name \"$domain_name\" saved to $STATEFILE." else ocf_log warn "Domain name ${DOMAIN_NAME} already defined, overriding configuration file ${OCF_RESKEY_config}. You should do this for testing only." fi } VirtualDomain_Cleanup_Statefile() { rm -f $STATEFILE || ocf_log warn "Failed to remove $STATEFILE during $__OCF_ACTION." } VirtualDomain_Status() { local try=0 rc=$OCF_ERR_GENERIC status="no state" while [ "$status" = "no state" ]; do try=$(($try + 1 )) status="`virsh $VIRSH_OPTIONS domstate $DOMAIN_NAME`" case "$status" in "shut off") # shut off: domain is defined, but not started ocf_log debug "Virtual domain $DOMAIN_NAME is currently $status." rc=$OCF_NOT_RUNNING ;; running|paused|idle|blocked) # running: domain is currently actively consuming cycles # paused: domain is paused (suspended) # idle: domain is running but idle # blocked: synonym for idle used by legacy Xen versions ocf_log debug "Virtual domain $DOMAIN_NAME is currently $status." rc=$OCF_SUCCESS ;; ""|"no state") # Empty string may be returned when virsh does not # receive a reply from libvirtd. # "no state" may occur when the domain is currently # being migrated (on the migration target only), or # whenever virsh can't reliably obtain the domain # state. status="no state" if [ "$__OCF_ACTION" = "stop" ] && [ $try -ge 3 ]; then # During the stop operation, we want to bail out # quickly, so as to be able to force-stop (destroy) # the domain if necessary. ocf_log error "Virtual domain $DOMAIN_NAME has no state during stop operation, bailing out." return $OCF_ERR_GENERIC; else # During all other actions, we just wait and try # again, relying on the CRM/LRM to time us out if # this takes too long. ocf_log info "Virtual domain $DOMAIN_NAME currently has no state, retrying." sleep 1 fi ;; *) # any other output is unexpected. ocf_log error "Virtual domain $DOMAIN_NAME has unknown status \"$status\"!" ;; esac done return $rc } VirtualDomain_Start() { if VirtualDomain_Status; then ocf_log info "Virtual domain $DOMAIN_NAME already running." return $OCF_SUCCESS fi virsh $VIRSH_OPTIONS start ${DOMAIN_NAME} rc=$? if [ $rc -ne 0 ]; then ocf_log error "Failed to start virtual domain ${DOMAIN_NAME}." return $OCF_ERR_GENERIC fi while ! VirtualDomain_Monitor; do sleep 1 done return $OCF_SUCCESS } VirtualDomain_Stop() { local i local status local shutdown_timeout local out ex VirtualDomain_Status status=$? case $status in $OCF_SUCCESS) if ! ocf_is_true $OCF_RESKEY_force_stop; then # Issue a graceful shutdown request ocf_log info "Issuing graceful shutdown request for domain ${DOMAIN_NAME}." virsh $VIRSH_OPTIONS shutdown ${DOMAIN_NAME} # The "shutdown_timeout" we use here is the operation # timeout specified in the CIB, minus 5 seconds shutdown_timeout=$(( $NOW + ($OCF_RESKEY_CRM_meta_timeout/1000) -5 )) # Loop on status until we reach $shutdown_timeout while [ $NOW -lt $shutdown_timeout ]; do VirtualDomain_Status status=$? case $status in $OCF_NOT_RUNNING) # This was a graceful shutdown. Clean # up and return. VirtualDomain_Cleanup_Statefile return $OCF_SUCCESS ;; $OCF_SUCCESS) # Domain is still running, keep # waiting (until shutdown_timeout # expires) sleep 1 ;; *) # Something went wrong. Bail out and # resort to forced stop (destroy). break; esac NOW=$(date +%s) done fi ;; $OCF_NOT_RUNNING) ocf_log info "Domain $DOMAIN_NAME already stopped." return $OCF_SUCCESS esac # OK. Now if the above graceful shutdown hasn't worked, kill # off the domain with destroy. If that too does not work, # have the LRM time us out. ocf_log info "Issuing forced shutdown (destroy) request for domain ${DOMAIN_NAME}." out=$(virsh $VIRSH_OPTIONS destroy ${DOMAIN_NAME} 2>&1) ex=$? echo >&2 "$out" # unconditionally clean up. VirtualDomain_Cleanup_Statefile case $ex$out in *"error:"*"domain is not running"*) : ;; # unexpected path to the intended outcome, all is well [!0]*) return $OCF_ERR_GENERIC ;; 0*) while [ $status != $OCF_NOT_RUNNING ]; do VirtualDomain_Status status=$? done ;; esac return $OCF_SUCCESS } VirtualDomain_Migrate_To() { local target_node local remoteuri local transport_suffix local migrateuri local migrateport local migrate_target local hypervisor target_node="$OCF_RESKEY_CRM_meta_migrate_target" if VirtualDomain_Status; then # Find out the remote hypervisor to connect to. That is, turn # something like "qemu://foo:9999/system" into # "qemu+tcp://bar:9999/system" if [ -n "${OCF_RESKEY_migration_transport}" ]; then transport_suffix="+${OCF_RESKEY_migration_transport}" fi # A typical migration URI via a special migration network looks # like "tcp://bar-mig:49152". The port would be randomly chosen # by libvirt from the range 49152-49215 if omitted, at least since # version 0.7.4 ... if [ -n "${OCF_RESKEY_migration_network_suffix}" ]; then hypervisor="${OCF_RESKEY_hypervisor%%[+:]*}" # Hostname might be a FQDN migrate_target=$(echo ${target_node} | sed -e "s,^\([^.]\+\),\1${OCF_RESKEY_migration_network_suffix},") case $hypervisor in qemu) # For quiet ancient libvirt versions a migration port is needed # and the URI must not contain the "//". Newer versions can handle # the "bad" URI. migrateport=$(( 49152 + $(ocf_maybe_random) % 64 )) migrateuri="tcp:${migrate_target}:${migrateport}" ;; xen) migrateuri="xenmigr://${migrate_target}" ;; *) ocf_log warn "$DOMAIN_NAME: Migration via dedicated network currently not supported for ${hypervisor}." ;; esac fi # Scared of that sed expression? So am I. :-) remoteuri=$(echo ${OCF_RESKEY_hypervisor} | sed -e "s,\(.*\)://[^/:]*\(:\?[0-9]*\)/\(.*\),\1${transport_suffix}://${target_node}\2/\3,") # OK, we know where to connect to. Now do the actual migration. ocf_log info "$DOMAIN_NAME: Starting live migration to ${target_node} (using remote hypervisor URI ${remoteuri} ${migrateuri})." virsh ${VIRSH_OPTIONS} migrate --live $DOMAIN_NAME ${remoteuri} ${migrateuri} rc=$? if [ $rc -ne 0 ]; then ocf_log err "$DOMAIN_NAME: live migration to ${remoteuri} ${migrateuri} failed: $rc" return $OCF_ERR_GENERIC else ocf_log info "$DOMAIN_NAME: live migration to ${target_node} succeeded." VirtualDomain_Cleanup_Statefile return $OCF_SUCCESS fi else ocf_log err "$DOMAIN_NAME: migrate_to: Not active locally!" return $OCF_ERR_GENERIC fi } VirtualDomain_Migrate_From() { while ! VirtualDomain_Monitor; do sleep 1 done ocf_log info "$DOMAIN_NAME: live migration from ${OCF_RESKEY_CRM_meta_migrate_source} succeeded." return $OCF_SUCCESS } VirtualDomain_Monitor() { # First, check the domain status. If that returns anything other # than $OCF_SUCCESS, something is definitely wrong. VirtualDomain_Status rc=$? if [ ${rc} -eq ${OCF_SUCCESS} ]; then # OK, the generic status check turned out fine. Now, if we # have monitor scripts defined, run them one after another. for script in ${OCF_RESKEY_monitor_scripts}; do script_output="$($script 2>&1)" script_rc=$? if [ ${script_rc} -ne ${OCF_SUCCESS} ]; then # A monitor script returned a non-success exit # code. Stop iterating over the list of scripts, log a # warning message, and propagate $OCF_ERR_GENERIC. ocf_log warn "Monitor command \"${script}\" for domain ${DOMAIN_NAME} returned ${script_rc} with output: ${script_output}" rc=$OCF_ERR_GENERIC break else ocf_log debug "Monitor command \"${script}\" for domain ${DOMAIN_NAME} completed successfully with output: ${script_output}" fi done fi update_utilization return ${rc} } VirtualDomain_Validate_All() { # Required binaries: for binary in virsh sed; do check_binary $binary done if [ -z $OCF_RESKEY_config ]; then ocf_log error "Missing configuration parameter \"config\"." return $OCF_ERR_CONFIGURED fi # check if we can read the config file (otherwise we're unable to # deduce $DOMAIN_NAME from it, see below) if [ ! -r $OCF_RESKEY_config ]; then if ocf_is_probe; then ocf_log info "Configuration file $OCF_RESKEY_config not readable during probe." + elif [ "$__OCF_ACTION" = "stop" ]; then + ocf_log info "Configuration file $OCF_RESKEY_config not readable, resource considered stopped." else ocf_log error "Configuration file $OCF_RESKEY_config does not exist or is not readable." return $OCF_ERR_INSTALLED fi fi } if [ $# -ne 1 ]; then usage exit $OCF_ERR_ARGS fi case $1 in meta-data) meta_data exit $OCF_SUCCESS ;; usage) usage exit $OCF_SUCCESS ;; esac # Everything except usage and meta-data must pass the validate test VirtualDomain_Validate_All || exit $? # During a probe, it is permissible for the config file to not be # readable (it might be on shared storage not available during the # probe). In that case, VirtualDomain_Define can't work and we're # unable to get the domain name. Thus, we also can't check whether the # domain is running. The only thing we can do here is to assume that # it is not running. if [ ! -r $OCF_RESKEY_config ]; then ocf_is_probe && exit $OCF_NOT_RUNNING [ "$__OCF_ACTION" = "stop" ] && exit $OCF_SUCCESS fi # Define the domain on startup, and re-define whenever someone deleted # the state file, or touched the config. if [ ! -e $STATEFILE ] || [ $OCF_RESKEY_config -nt $STATEFILE ]; then VirtualDomain_Define fi # By now, we should definitely be able to read from the state file. # If not, something went wrong. if [ ! -r $STATEFILE ]; then ocf_log err "$STATEFILE not found or unreadable. This is unexpected. Cannot determine domain name." exit $OCF_ERR_GENERIC fi # Finally, retrieve the domain name from the state file. DOMAIN_NAME=`cat $STATEFILE 2>/dev/null` if [ -z $DOMAIN_NAME ]; then ocf_log err "$STATEFILE is empty. This is unexpected. Cannot determine domain name." exit $OCF_ERR_GENERIC fi case $1 in start) VirtualDomain_Start ;; stop) VirtualDomain_Stop ;; migrate_to) VirtualDomain_Migrate_To ;; migrate_from) VirtualDomain_Migrate_From ;; status) VirtualDomain_Status ;; monitor) VirtualDomain_Monitor ;; validate-all) ;; *) usage exit $OCF_ERR_UNIMPLEMENTED ;; esac exit $?