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107 lines
2.9 KiB
107 lines
2.9 KiB
#!/bin/bash
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#
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# -------------------------------------------------------------------------- #
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# Copyright 2010-2016, OpenNebula Systems #
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# #
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# Licensed under the Apache License, Version 2.0 (the "License"); you may #
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# not use this file except in compliance with the License. You may obtain #
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# a copy of the License at #
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# #
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# http://www.apache.org/licenses/LICENSE-2.0 #
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# #
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# Unless required by applicable law or agreed to in writing, software #
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# distributed under the License is distributed on an "AS IS" BASIS, #
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
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# See the License for the specific language governing permissions and #
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# limitations under the License. #
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#--------------------------------------------------------------------------- #
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LOCK_FILE="/var/run/one-context.lock"
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CONTEXT_FILE="/tmp/context.sh"
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CONTEXT_NEW="${CONTEXT_FILE}.new"
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END_CONTEXT="/tmp/context.end"
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function export_rc_vars
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{
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if [ -f $1 ] ; then
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ONE_VARS=`cat $1 | egrep -e '^[a-zA-Z\-\_0-9]*=' | sed 's/=.*$//'`
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. $1
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for v in $ONE_VARS; do
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export $v
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done
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fi
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}
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function execute_scripts {
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SCRIPTS_DIR="/etc/one-context.d"
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for script in $SCRIPTS_DIR/*; do
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"$script" "$1"
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done
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}
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function get_new_context {
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CONTEXT_DEV=`blkid -l -t LABEL="CONTEXT" -o device`
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if [ -e "$CONTEXT_DEV" ]; then
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mount -t iso9660 -L CONTEXT -o ro /mnt
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if [ -f /mnt/context.sh ]; then
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cp /mnt/context.sh ${CONTEXT_NEW}
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fi
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echo "umount /mnt" > ${END_CONTEXT}
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elif curl -o ${CONTEXT_NEW} http://169.254.169.254/latest/user-data ; then
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echo -n ""
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elif type vmtoolsd ; then
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vmtoolsd --cmd 'info-get guestinfo.opennebula.context' | \
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openssl base64 -d > ${CONTEXT_NEW}
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fi
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}
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function check_context {
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if [ -s "${CONTEXT_NEW}" ]; then
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diff ${CONTEXT_FILE} ${CONTEXT_NEW} >/dev/null 2>&1 && return 1
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return 0
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else
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return 1
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fi
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}
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function run_context {
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cp ${CONTEXT_NEW} ${CONTEXT_FILE}
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export_rc_vars ${CONTEXT_FILE}
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execute_scripts "$1"
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}
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function end_context {
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if [ -e "${END_CONTEXT}" ]; then
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sh "${END_CONTEXT}"
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rm "${END_CONTEXT}"
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fi
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[ -e "${CONTEXT_NEW}" ] && rm "${CONTEXT_NEW}"
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}
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function adquire_lock {
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while [ -e "${LOCK_FILE}" ]; do
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sleep 1
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done
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touch "${LOCK_FILE}"
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}
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function release_lock {
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rm -f "${LOCK_FILE}"
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}
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COMMAND="$1"
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adquire_lock
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get_new_context
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check_context && run_context "$COMMAND"
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end_context
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release_lock
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