postmigrate

#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2019, OpenNebula Project, OpenNebula Systems                #
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# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
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# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
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# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

# PREMIGRATE SOURCE DST remote_system_dir vmid dsid template
#  - SOURCE is the host where the VM is running
#  - DST is the host where the VM is to be migrated
#  - remote_system_dir is the path for the VM home in the system datastore
#  - vmid is the id of the VM
#  - dsid is the target datastore
#  - template is the template of the VM in XML and base64 encoded

SRC_HOST=$1
DST_HOST=$2

SRC_PATH=$3

VMID=$4
DSID=$5

if [ ! -t 0 ]; then
  TEMPLATE_64=$(cat)
else
  TEMPLATE_64=$(onevm show -x "$VMID" | base64 | tr -d '\n')
fi

#--------------------------------------------------------------------------------

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
fi

DRIVER_PATH=$(dirname $0)

source $TMCOMMON
source ${DRIVER_PATH}/../../datastore/libfs.sh
source ${DRIVER_PATH}/../../etc/datastore/linstor_un/linstor_un.conf
source ${DRIVER_PATH}/../../datastore/linstor_un/linstor_utils.sh


#--------------------------------------------------------------------------------

if [ "$SRC_HOST" == "$DST_HOST" ]; then
    log "Not moving $SRC_HOST to $DST_HOST, they are the same host"
    exit 0
fi

#--------------------------------------------------------------------------------

if [ -n "$7" ]; then
    log "Called from tm/$7 but I've nothing to do"
    exit 0
fi

#--------------------------------------------------------------------------------

XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <(onedatastore show -x $DSID | $XPATH \
                    /DATASTORE/TEMPLATE/LS_CONTROLLERS \
                    /DATASTORE/TEMPLATE/LS_CERTFILE \
                    /DATASTORE/TEMPLATE/LS_KEYFILE \
                    /DATASTORE/TEMPLATE/LS_CAFILE)

LS_CONTROLLERS="${XPATH_ELEMENTS[j++]}"
LS_CERTFILE="${XPATH_ELEMENTS[j++]}"
LS_KEYFILE="${XPATH_ELEMENTS[j++]}"
LS_CAFILE="${XPATH_ELEMENTS[j++]}"

linstor_load_keys

migrate_other "$@"

exec_and_log \
    "$SSH $SRC_HOST rm -rf $SRC_PATH"

VM_XML=$(onevm show -x $VMID)
DISK_IDS="$(echo "$VM_XML" | $XPATH \
                    '%m%/VM/TEMPLATE/DISK[TM_MAD="linstor_un"]/DISK_ID')"

for DISK_ID in $DISK_IDS; do

    unset i j XPATH_ELEMENTS

    while IFS= read -r -d '' element; do
        XPATH_ELEMENTS[i++]="$element"
    done < <(echo "$VM_XML" | $XPATH \
                        "/VM/TEMPLATE/DISK[DISK_ID=\"$DISK_ID\"]/IMAGE_ID" \
                        "/VM/TEMPLATE/DISK[DISK_ID=\"$DISK_ID\"]/CLONE")

    IMAGE_ID="${XPATH_ELEMENTS[j++]}"
    CLONE="${XPATH_ELEMENTS[j++]}"

    if [ "$CLONE" != "NO" ]; then
        SRC_RES="one-vm-$VMID-disk-$DISK_ID"
    else
        SRC_RES="one-image-$IMAGE_ID"
    fi

    # Unset allow-two-primaries
    linstor_exec_and_log \
        "resource-definition set-property $SRC_RES DrbdOptions/Net/allow-two-primaries"

    # Detach resource
    SRC_RES_DISKLESS_HOSTS=$(linstor_get_diskless_hosts_for_res "$SRC_RES")
    if item_in_list "$SRC_HOST" "$SRC_RES_DISKLESS_HOSTS"; then
        linstor_exec_and_log \
            "resource delete $SRC_HOST $SRC_RES --async"
    fi

done

exit 0