[Xen-API] REQUEST - Power on after another VM was started

[Alberto González Rodríguez <alberto@xxxxxxxxxxxxx>]

Hello,

I would like know about your opinion about implement startup order on xenserver/xcp

I did a little modification on "xapi-autostart-vms" file, idea is the next:

- other_config:auto_poweron now is false or true, for any reason seems not boolean, then i can use "false" as value

- a two new fields on VM's other_config

     - auto_poweron_after: contains a vm uuid, if this value has a vm uuid, then is started when vm on auto_poweron_after field is in state "running"

     - auto_poweron_after_tools, contains a vm uuid, if this value has a vm uuid, then is started when vm on auto_poweron_after field has the field "live" in true

An example:

xe vm-param-set uuid=df81d848-e246-8958-125e-ad53d72b32de other-config:auto_poweron=after

xe vm-param-set uuid=df81d848-e246-8958-125e-ad53d72b32de other-config:auto_poweron_after=b2e6f6e0-c981-372e-10c0-a51bbc7164ec (or xe vm-param-set uuid=df81d848-e246-8958-125e-ad53d72b32de other-config:auto_poweron_after_tools=b2e6f6e0-c981-372e-10c0-a51bbc7164ec)

script modified is:

#!/bin/sh

#

# Copyright (c) Citrix Systems 2008. All rights reserved.

#

# wait for xapi initialisation to complete.

# Then, if initialisation did complete,  attempt to start all vms

# with "auto_poweron" in their other-config

#

[ -e /proc/xen ] || exit 0

XAPI_START_TIMEOUT_SECONDS=240

# wait for xapi to complete initialisation for a max 4 minutes

/opt/xensource/bin/xapi-wait-init-complete ${XAPI_START_TIMEOUT_SECONDS}

if [ $? -eq 0 ]; then

    # if xapi init completed then start vms (best effort, don't report errors)

    xe vm-start other-config:auto_poweron=true power-state=halted --multiple >/dev/null 2>/dev/null || true

    # 120 seconds should be a generous time 

    for i in `/usr/bin/seq 1 24`;

    do

            UUIDS=$(/opt/xensource/bin/xe vm-list other-config:auto_poweron=after power-state=halted | /bin/grep ^uuid | /bin/awk '{print $5}')

            # If there are not vm with power state halted and auto_poweron=after, exit with 0

            if [ -z "$UUIDS" ]; then  

               exit 0

            fi

            for uuid in $UUIDS 

            do

                # Fields are "auto_poweron_after" and "auto_poweron_after_tools" and contains vm uuid

                AFTER=$(/opt/xensource/bin/xe vm-param-get uuid=${uuid} param-name=other-config param-key=auto_poweron_after 2>/dev/null)

                AFTERTOOLS=$(/opt/xensource/bin/xe vm-param-get uuid=${uuid}   param-name=other-config param-key=auto_poweron_after_tools 2>/dev/null)

                if [ "x$AFTER" != "x" ];        then

                        STATE=$(/opt/xensource/bin/xe vm-param-get uuid=${AFTER} param-name=power-state 2>/dev/null)

                        # Start if vm is running

                        if [ "$STATE" == "running" ]; then

                            /opt/xensource/bin/xe vm-start uuid=${uuid}

                        fi

                elif [ "x$AFTERTOOLS" != "x" ]; then

                        STATE=$(/opt/xensource/bin/xe vm-param-get uuid=${AFTERTOOLS} param-name=live 2>/dev/null)

                        # Start xen tools are running

                        if [ "$STATE" == "true" ]; then

                            /opt/xensource/bin/xe vm-start uuid=${uuid}

                        fi

                fi

            done

            sleep 5

     done 

fi

sorry my english

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