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[mc] Add dinnerbone's mcstatus and use it for HEALTHCHECK

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Part of #159
This commit is contained in:
Geoff Bourne 2017-06-11 11:01:59 -05:00
parent 123292b56b
commit 5b8668d73f
2 changed files with 33 additions and 1 deletions
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6
minecraft-server/Dockerfile
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@ -16,9 +16,13 @@ RUN echo "http://dl-3.alpinelinux.org/alpine/v3.5/community/" >> /etc/apk/reposi
git \
jq \
mysql-client \
python python-dev && \
python python-dev py2-pip && \
rm -rf /var/cache/apk/*
RUN pip install mcstatus
HEALTHCHECK CMD mcstatus localhost ping
RUN addgroup -g 1000 minecraft \
&& adduser -Ss /bin/false -u 1000 -G minecraft -h /home/minecraft minecraft \
&& mkdir /data \

28
minecraft-server/README.md
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@ -117,6 +117,34 @@ or a specific version:
docker run -d -e VERSION=1.7.9 ...
## Healthcheck
This image contains [Dinnerbone's mcstatus](https://github.com/Dinnerbone/mcstatus) and uses
its `ping` command to continually check on the container's. That can be observed
from the `STATUS` column of `docker ps`
```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b418af073764 mc "/start" 43 seconds ago Up 41 seconds (healthy) 0.0.0.0:25565->25565/tcp, 25575/tcp mc
```
You can also query the container's health in a script friendly way:
```
> docker container inspect -f "{{.State.Health.Status}}" mc
healthy
```
Finally, since `mcstatus` is on the `PATH` you can exec into the container
and use mcstatus directly and invoke any of its other commands:
```
> docker exec mc mcstatus localhost status
version: v1.12 (protocol 335)
description: "{u'text': u'A Minecraft Server Powered by Docker'}"
players: 0/20 No players online
```
## Running a Forge Server
Enable Forge server mode by adding a `-e TYPE=FORGE` to your command-line.