diff options
| -rw-r--r-- | changelog.d/16919.misc | 1 | ||||
| -rwxr-xr-x | docker/prefix-log | 7 |
2 files changed, 6 insertions, 2 deletions
diff --git a/changelog.d/16919.misc b/changelog.d/16919.misc new file mode 100644 index 0000000000..2c76f25379 --- /dev/null +++ b/changelog.d/16919.misc @@ -0,0 +1 @@ +Multi-worker-docker-container: disable log buffering. diff --git a/docker/prefix-log b/docker/prefix-log index 0e26a4f19d..32dddbbfd4 100755 --- a/docker/prefix-log +++ b/docker/prefix-log @@ -7,6 +7,9 @@ # prefix-log command [args...] # -exec 1> >(awk '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0}' >&1) -exec 2> >(awk '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0}' >&2) +# '-W interactive' is a `mawk` extension which disables buffering on stdout and sets line-buffered reads on +# stdin. The effect is that the output is flushed after each line, rather than being batched, which helps reduce +# confusion due to to interleaving of the different processes. +exec 1> >(awk -W interactive '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0 }' >&1) +exec 2> >(awk -W interactive '{print "'"${SUPERVISOR_PROCESS_NAME}"' | "$0 }' >&2) exec "$@" |