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Merge pull request #10 from cloudfoundry-incubator/drain-support
Improve drain script support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| package containerrun | ||
|
|
||
| import ( | ||
| "io/ioutil" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| // WriteBPMscript creates a bpm script for drain script compatibility. | ||
| func WriteBPMscript() error { | ||
| fileName := "/var/vcap/jobs/bpm/bin/bpm" | ||
|
|
||
| script := `#!/bin/bash | ||
| function usage { | ||
| echo "usage: $0 [start|stop|quit|term|running] JOBNAME [-p PROCESSNAME]" | ||
| exit 1 | ||
| } | ||
| if [ $# != 2 -a $# != 4 ]; then | ||
| usage | ||
| fi | ||
| if [ "$1" != "start" -a "$1" != "stop" -a "$1" != "running" -a \ | ||
| "$1" != "quit" -a "$1" != "term" ] | ||
| then | ||
| usage | ||
| fi | ||
| CMD="$1" | ||
| JOB="$2" | ||
| PROCESS="$2" | ||
| if [ $# == 4 ]; then | ||
| if [ "$3" != "-p" ]; then | ||
| usage | ||
| fi | ||
| PROCESS="$4" | ||
| fi | ||
| CONTAINER_RUN="/var/vcap/data/${JOB}/${PROCESS}_containerrun" | ||
| if [ "$CMD" == "running" ]; then | ||
| # Print yes/no if stdout is a tty | ||
| if [ -f "${CONTAINER_RUN}.running" ]; then | ||
| test -t 1 && echo "yes" | ||
| exit 0 | ||
| else | ||
| test -t 1 && echo "no" | ||
| exit 1 | ||
| fi | ||
| else | ||
| # "term" is the same as "stop", except we won't wait | ||
| ACTION="${CMD/term/stop}" | ||
| # Send "START", "STOP", or "QUIT" over UDP to the unix socket | ||
| # with a 1 seconds timeout to establish the connection. | ||
| echo "${ACTION^^}" | nc -w 1 -uU "${CONTAINER_RUN}.sock" | ||
| if [ "${CMD}" == "stop" ]; then | ||
| for i in $(seq 30); do | ||
| test ! -f "${CONTAINER_RUN}.running" && exit 0 | ||
| sleep 1 | ||
| done | ||
| echo Process did not stop within 30 seconds | ||
| exit 1 | ||
| fi | ||
| fi | ||
| ` | ||
| if _, err := os.Stat(fileName); !os.IsNotExist(err) { | ||
| // Nothing to do if the file already exists | ||
| return nil | ||
| } | ||
| if err := os.MkdirAll(filepath.Dir(fileName), 0755); err != nil { | ||
| return err | ||
| } | ||
| return ioutil.WriteFile(fileName, []byte(script), 0755) | ||
| } |
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