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Remove references to the docker-ut image 

Signed-off-by: Aidan Hobson Sayers <aidanhs@cantab.net>
This commit is contained in:
Aidan Hobson Sayers 2015-10-15 15:01:55 +01:00
parent f9a1c8fc64
commit ac9c0f81df
1 changed files with 15 additions and 14 deletions
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29
docs/articles/ambassador_pattern_linking.md
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@ -81,42 +81,43 @@ On the Docker host (192.168.1.52) that Redis will run on:
^D
# add redis ambassador
$ docker run -t -i --link redis:redis --name redis_ambassador -p 6379:6379 busybox sh
$ docker run -t -i --link redis:redis --name redis_ambassador -p 6379:6379 alpine:3.2 sh
In the `redis_ambassador` container, you can see the linked Redis
containers `env`:
$ env
/ # env
REDIS_PORT=tcp://172.17.0.136:6379
REDIS_PORT_6379_TCP_ADDR=172.17.0.136
REDIS_NAME=/redis_ambassador/redis
HOSTNAME=19d7adf4705e
SHLVL=1
HOME=/root
REDIS_PORT_6379_TCP_PORT=6379
HOME=/
REDIS_PORT_6379_TCP_PROTO=tcp
container=lxc
REDIS_PORT_6379_TCP=tcp://172.17.0.136:6379
TERM=xterm
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
/ # exit
This environment is used by the ambassador `socat` script to expose Redis
to the world (via the `-p 6379:6379` port mapping):
$ docker rm redis_ambassador
$ sudo ./contrib/mkimage-unittest.sh
$ docker run -t -i --link redis:redis --name redis_ambassador -p 6379:6379 docker-ut sh
$ socat -t 100000000 TCP4-LISTEN:6379,fork,reuseaddr TCP4:172.17.0.136:6379
$ CMD="apk update && apk add socat && sh"
$ docker run -t -i --link redis:redis --name redis_ambassador -p 6379:6379 alpine:3.2 sh -c "$CMD"
[...]
/ # socat -t 100000000 TCP4-LISTEN:6379,fork,reuseaddr TCP4:172.17.0.136:6379
Now ping the Redis server via the ambassador:
Now go to a different server:
$ sudo ./contrib/mkimage-unittest.sh
$ docker run -t -i --expose 6379 --name redis_ambassador docker-ut sh
$ socat -t 100000000 TCP4-LISTEN:6379,fork,reuseaddr TCP4:192.168.1.52:6379
$ CMD="apk update && apk add socat && sh"
$ docker run -t -i --expose 6379 --name redis_ambassador alpine:3.2 sh -c "$CMD"
[...]
/ # socat -t 100000000 TCP4-LISTEN:6379,fork,reuseaddr TCP4:192.168.1.52:6379
And get the `redis-cli` image so we can talk over the ambassador bridge.
@ -127,7 +128,7 @@ And get the `redis-cli` image so we can talk over the ambassador bridge.
## The svendowideit/ambassador Dockerfile
The `svendowideit/ambassador` image is based on the `alpine` image with
The `svendowideit/ambassador` image is based on the `alpine:3.2` image with
`socat` installed. When you start the container, it uses a small `sed`
script to parse out the (possibly multiple) link environment variables
to set up the port forwarding. On the remote host, you need to set the
@ -155,5 +156,5 @@ case `192.168.1.52:6379`.
RUN apk update && \
apk add socat && \
rm -r /var/cache/
CMD env | grep _TCP= | sed 's/.*_PORT_\([0-9]*\)_TCP=tcp:\/\/\(.*\):\(.*\)/socat -t 100000000 TCP4-LISTEN:\1,fork,reuseaddr TCP4:\2:\3 \& wait/' | sh