6931c1fc7e
Add a script called wait_for_stack_ready that calls heat stack-show in a wait_for loop waiting for either the stack to be ready or else when the stack fails and will never be ready. wait_for_stack_ready sets up the FAIL_MATCH_OUTPUT environment variable to check when stack-create fails and setups a new SUCCESSFUL_MATCH_OUTPUT that check the output from the heat stack-show for when the stack reaches the UPDATE_COMPLETE or CREATE_COMPLETE state. Change-Id: I7daf5010d15e458d98698fb8b7e744e2a17596b1
82 lines
2.6 KiB
Bash
Executable File
82 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Copyright 2013 Red Hat
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# All Rights Reserved.
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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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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set -e # exit on the first non-zero status
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set -u # exit on unset variables
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SCRIPT_NAME=$(basename $0)
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function show_options() {
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echo "Usage: $SCRIPT_NAME LOOPS_NUMBER SLEEP_TIME ARGS"
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echo
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echo "ARGS are read and concatenated together into a single command."
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echo "Execute the command in a loop until it succeeds or the number"
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echo "of attempts exceeds LOOPS_NUMBER value. After each failure"
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echo "pause for SLEEP_TIME seconds."
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echo
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echo "An optional FAIL_MATCH_OUTPUT variable may also be set to control "
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echo "if the loop exits early if the commands stdout/stderr matches the "
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echo "supplied regex string."
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echo
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echo "Examples:"
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echo " wait_for 30 10 ping -c 1 192.0.2.2"
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echo " wait_for 10 1 ls file_we_are_waiting_for"
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echo " wait_for 10 3 date \| grep 8"
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echo " FAIL_MATCH_OUTPUT=CREATE_FAILED wait_for 30 10 heat stack-show undercloud"
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echo " SUCCESSFUL_MATCH_OUTPUT=CREATE_COMPLETE wait_for 30 10 heat stack-show undercloud"
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exit 1
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}
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LOOPS=${1:-""}
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SLEEPTIME=${2:-""}
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FAIL_MATCH_OUTPUT=${FAIL_MATCH_OUTPUT:-""}
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SUCCESSFUL_MATCH_OUTPUT=${SUCCESSFUL_MATCH_OUTPUT:-""}
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shift 2 || true
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COMMAND="$@"
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if [ -z "$LOOPS" -o -z "$SLEEPTIME" -o -z "$COMMAND" ]; then
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show_options
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fi
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i=0
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while [ $i -lt $LOOPS ]; do
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i=$((i + 1))
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STATUS=0
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OUTPUT=$(eval $COMMAND 2>&1) || STATUS=$?
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if [[ -n "$SUCCESSFUL_MATCH_OUTPUT" ]] \
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&& [[ $OUTPUT =~ $SUCCESSFUL_MATCH_OUTPUT ]]; then
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exit 0
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elif [[ -n "$FAIL_MATCH_OUTPUT" ]] \
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&& [[ $OUTPUT =~ $FAIL_MATCH_OUTPUT ]]; then
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echo "Command output matched '$FAIL_MATCH_OUTPUT'. Exiting..."
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exit 1
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elif [[ -z "$SUCCESSFUL_MATCH_OUTPUT" ]] && [[ $STATUS -eq 0 ]]; then
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# The command successfully completed and we aren't testing against
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# it's output so we have finished waiting.
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exit 0
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fi
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sleep $SLEEPTIME
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done
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SECONDS=$((LOOPS * SLEEPTIME))
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printf 'Timing out after %d seconds:\nCOMMAND=%s\nOUTPUT=%s\n' \
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"$SECONDS" "$COMMAND" "$OUTPUT"
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exit 1
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