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fix start-up order through wait-for-it.sh script.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| #!/usr/bin/env bash | ||
| # Use this script to test if a given TCP host/port are available | ||
|
|
||
| cmdname=$(basename $0) | ||
|
|
||
| echoerr() { if [[ $QUIET -ne 1 ]]; then echo "$@" 1>&2; fi } | ||
|
|
||
| usage() | ||
| { | ||
| cat << USAGE >&2 | ||
| Usage: | ||
| $cmdname host:port [-s] [-t timeout] [-- command args] | ||
| -h HOST | --host=HOST Host or IP under test | ||
| -p PORT | --port=PORT TCP port under test | ||
| Alternatively, you specify the host and port as host:port | ||
| -s | --strict Only execute subcommand if the test succeeds | ||
| -q | --quiet Don't output any status messages | ||
| -t TIMEOUT | --timeout=TIMEOUT | ||
| Timeout in seconds, zero for no timeout | ||
| -- COMMAND ARGS Execute command with args after the test finishes | ||
| USAGE | ||
| exit 1 | ||
| } | ||
|
|
||
| wait_for() | ||
| { | ||
| if [[ $TIMEOUT -gt 0 ]]; then | ||
| echoerr "$cmdname: waiting $TIMEOUT seconds for $HOST:$PORT" | ||
| else | ||
| echoerr "$cmdname: waiting for $HOST:$PORT without a timeout" | ||
| fi | ||
| start_ts=$(date +%s) | ||
| while : | ||
| do | ||
| if [[ $ISBUSY -eq 1 ]]; then | ||
| nc -z $HOST $PORT | ||
| result=$? | ||
| else | ||
| (echo > /dev/tcp/$HOST/$PORT) >/dev/null 2>&1 | ||
| result=$? | ||
| fi | ||
| if [[ $result -eq 0 ]]; then | ||
| end_ts=$(date +%s) | ||
| echoerr "$cmdname: $HOST:$PORT is available after $((end_ts - start_ts)) seconds" | ||
| break | ||
| fi | ||
| sleep 1 | ||
| done | ||
| return $result | ||
| } | ||
|
|
||
| wait_for_wrapper() | ||
| { | ||
| # In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692 | ||
| if [[ $QUIET -eq 1 ]]; then | ||
| timeout $BUSYTIMEFLAG $TIMEOUT $0 --quiet --child --host=$HOST --port=$PORT --timeout=$TIMEOUT & | ||
| else | ||
| timeout $BUSYTIMEFLAG $TIMEOUT $0 --child --host=$HOST --port=$PORT --timeout=$TIMEOUT & | ||
| fi | ||
| PID=$! | ||
| trap "kill -INT -$PID" INT | ||
| wait $PID | ||
| RESULT=$? | ||
| if [[ $RESULT -ne 0 ]]; then | ||
| echoerr "$cmdname: timeout occurred after waiting $TIMEOUT seconds for $HOST:$PORT" | ||
| fi | ||
| return $RESULT | ||
| } | ||
|
|
||
| # process arguments | ||
| while [[ $# -gt 0 ]] | ||
| do | ||
| case "$1" in | ||
| *:* ) | ||
| hostport=(${1//:/ }) | ||
| HOST=${hostport[0]} | ||
| PORT=${hostport[1]} | ||
| shift 1 | ||
| ;; | ||
| --child) | ||
| CHILD=1 | ||
| shift 1 | ||
| ;; | ||
| -q | --quiet) | ||
| QUIET=1 | ||
| shift 1 | ||
| ;; | ||
| -s | --strict) | ||
| STRICT=1 | ||
| shift 1 | ||
| ;; | ||
| -h) | ||
| HOST="$2" | ||
| if [[ $HOST == "" ]]; then break; fi | ||
| shift 2 | ||
| ;; | ||
| --host=*) | ||
| HOST="${1#*=}" | ||
| shift 1 | ||
| ;; | ||
| -p) | ||
| PORT="$2" | ||
| if [[ $PORT == "" ]]; then break; fi | ||
| shift 2 | ||
| ;; | ||
| --port=*) | ||
| PORT="${1#*=}" | ||
| shift 1 | ||
| ;; | ||
| -t) | ||
| TIMEOUT="$2" | ||
| if [[ $TIMEOUT == "" ]]; then break; fi | ||
| shift 2 | ||
| ;; | ||
| --timeout=*) | ||
| TIMEOUT="${1#*=}" | ||
| shift 1 | ||
| ;; | ||
| --) | ||
| shift | ||
| CLI=("$@") | ||
| break | ||
| ;; | ||
| --help) | ||
| usage | ||
| ;; | ||
| *) | ||
| echoerr "Unknown argument: $1" | ||
| usage | ||
| ;; | ||
| esac | ||
| done | ||
|
|
||
| if [[ "$HOST" == "" || "$PORT" == "" ]]; then | ||
| echoerr "Error: you need to provide a host and port to test." | ||
| usage | ||
| fi | ||
|
|
||
| TIMEOUT=${TIMEOUT:-15} | ||
| STRICT=${STRICT:-0} | ||
| CHILD=${CHILD:-0} | ||
| QUIET=${QUIET:-0} | ||
|
|
||
| # check to see if timeout is from busybox? | ||
| # check to see if timeout is from busybox? | ||
| TIMEOUT_PATH=$(realpath $(which timeout)) | ||
| if [[ $TIMEOUT_PATH =~ "busybox" ]]; then | ||
| ISBUSY=1 | ||
| BUSYTIMEFLAG="-t" | ||
| else | ||
| ISBUSY=0 | ||
| BUSYTIMEFLAG="" | ||
| fi | ||
|
|
||
| if [[ $CHILD -gt 0 ]]; then | ||
| wait_for | ||
| RESULT=$? | ||
| exit $RESULT | ||
| else | ||
| if [[ $TIMEOUT -gt 0 ]]; then | ||
| wait_for_wrapper | ||
| RESULT=$? | ||
| else | ||
| wait_for | ||
| RESULT=$? | ||
| fi | ||
| fi | ||
|
|
||
| if [[ $CLI != "" ]]; then | ||
| if [[ $RESULT -ne 0 && $STRICT -eq 1 ]]; then | ||
| echoerr "$cmdname: strict mode, refusing to execute subprocess" | ||
| exit $RESULT | ||
| fi | ||
| exec "${CLI[@]}" | ||
| else | ||
| exit $RESULT | ||
| fi |
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