Yong Tang a1efc2cd7a Output external CAs in swarm mode with docker info ...

This fix tries to address the issue raised in 25195 where external
CA configurations are not present in `docker info`.

This fix adds the output of external CAs in `docker info` in swarm
mode.

The test is done manually with:
```
docker run -p 8888:8888 -e CXFSSL_ADDRESS=0.0.0.0 -d fabric8/cfssl
docker swarm init --external-ca protocol=cfssl,url=http://172.17.0.2:8888
```

The `docker info` output:
```
 Managers: 1
 Nodes: 1
 Orchestration:
  Task History Retention Limit: 5
 Raft:
  Snapshot interval: 10000
  Heartbeat tick: 1
  Election tick: 3
 Dispatcher:
  Heartbeat period: 5 seconds
 CA configuration:
  Expiry duration: 3 months
  External CAs:
    cfssl: https://172.17.0.2:8888
```

This fix fixes 25195.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 995128e9ebfc1a84bbfe8765d3642f132a4f630d
Component: engine

2016-07-30 09:14:16 -07:00

components/engine

Output external CAs in swarm mode with docker info

2016-07-30 09:14:16 -07:00

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