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Lars Kellogg-Stedman 869ecba652 journald log driver: use CONTAINER_ID field for container id

This patch modifies the journald log driver to store the container ID in
a field named CONTAINER_ID, rather than (ab)using the MESSAGE_ID field.
Additionally, this adds the CONTAINER_ID_FULL field containing the
complete container ID and CONTAINER_NAME, containing the container name.

When using the journald log driver, this permits you to see log messages
from a particular container like this:

    # journalctl CONTAINER_ID=a9238443e193

Example output from "journalctl -o verbose" includes the following:

    CONTAINER_ID=27aae7361e67
    CONTAINER_ID_FULL=27aae7361e67e2b4d3864280acd2b80e78daf8ec73786d8b68f3afeeaabbd4c4
    CONTAINER_NAME=web

Closes: #12864
Signed-off-by: Lars Kellogg-Stedman <lars@redhat.com>

2015-04-30 10:42:27 -04:00

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 # Reference Manual
 ## Contents:
  - [Commands](commandline/)
  - [Logging drivers](logging/)
  - [Dockerfile Reference](builder/)
  - [Docker Run Reference](run/)
  - [APIs](api/)