mirror of https://github.com/docker/docs.git
Fix codeblock format.
Signed-off-by: Ding Fei <dingfei@stars.org.cn>
This commit is contained in:
Ding Fei
parent
f40170a796
commit
98d049e45b
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@ -36,41 +36,41 @@ on the Swarm `manager` instance.
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1. Direct your local environment to the Swarm manager host.
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```bash
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$ eval $(docker-machine env manager)
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```
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```bash
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$ eval $(docker-machine env manager)
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```
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You can create the network on a cluster node at the network is visible on
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them all.
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2. Create the `voteapp` container network.
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```bash
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$ docker network create -d overlay voteapp
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```
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```bash
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$ docker network create -d overlay voteapp
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```
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3. Switch to the db store.
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```bash
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$ eval $(docker-machine env dbstore)
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```
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```bash
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$ eval $(docker-machine env dbstore)
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```
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4. Verify you can see the new network from the dbstore node.
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```bash
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$ docker network ls
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NETWORK ID NAME DRIVER
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e952814f610a voteapp overlay
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1f12c5e7bcc4 bridge bridge
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3ca38e887cd8 none null
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3da57c44586b host host
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```
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```bash
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$ docker network ls
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NETWORK ID NAME DRIVER
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e952814f610a voteapp overlay
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1f12c5e7bcc4 bridge bridge
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3ca38e887cd8 none null
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3da57c44586b host host
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```
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3. Create a container volume called `db-data`.
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```bash
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$ docker volume create --name db-data
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```
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```bash
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$ docker volume create --name db-data
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```
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## Task 2. Start the containerized microservices
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@ -98,71 +98,71 @@ command below, look for the value constraint.
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1. Start a Postgres database container.
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-v db-data:/var/lib/postgresql/data \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name db postgres:9.4
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-v db-data:/var/lib/postgresql/data \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name db postgres:9.4
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```
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6. Start the Redis container.
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 6379:6379 \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name redis redis
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 6379:6379 \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name redis redis
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```
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The `redis` name is important so don't change it.
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7. Start the worker application
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-e constraint:com.function==worker01 \
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--net="voteapp" \
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--net-alias=workers \
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--name worker01 docker/example-voting-app-worker
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-e constraint:com.function==worker01 \
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--net="voteapp" \
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--net-alias=workers \
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--name worker01 docker/example-voting-app-worker
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```
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6. Start the results application.
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=results \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name results-app docker/example-voting-app-result-app
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=results \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==dbstore \
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--net="voteapp" \
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--name results-app docker/example-voting-app-result-app
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```
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7. Start the voting application twice; once on each frontend node.
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=vote \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==frontend01 \
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--net="voteapp" \
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--name voting-app01 docker/example-voting-app-voting-app
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=vote \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==frontend01 \
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--net="voteapp" \
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--name voting-app01 docker/example-voting-app-voting-app
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```
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And again on the other frontend node.
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=vote \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==frontend02 \
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--net="voteapp" \
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--name voting-app02 docker/example-voting-app-voting-app
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-p 80:80 \
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--label=interlock.hostname=vote \
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--label=interlock.domain=myenterprise.com \
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-e constraint:com.function==frontend02 \
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--net="voteapp" \
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--name voting-app02 docker/example-voting-app-voting-app
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```
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## Task 3. Check your work and update /etc/hosts
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@ -173,68 +173,68 @@ allow you to take advantage of the loadbalancer.
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1. Change to the `loadbalancer` node.
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```bash
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$ eval $(docker-machine env loadbalancer)
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```
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```bash
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$ eval $(docker-machine env loadbalancer)
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```
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2. Check your work by reviewing the configuration of nginx.
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```html
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$ docker exec interlock cat /etc/conf/nginx.conf
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... output snipped ...
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```html
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$ docker exec interlock cat /etc/conf/nginx.conf
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... output snipped ...
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upstream results.myenterprise.com {
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zone results.myenterprise.com_backend 64k;
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upstream results.myenterprise.com {
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zone results.myenterprise.com_backend 64k;
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server 192.168.99.111:80;
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server 192.168.99.111:80;
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}
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server {
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listen 80;
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}
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server {
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listen 80;
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server_name results.myenterprise.com;
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server_name results.myenterprise.com;
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location / {
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proxy_pass http://results.myenterprise.com;
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}
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}
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upstream vote.myenterprise.com {
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zone vote.myenterprise.com_backend 64k;
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location / {
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proxy_pass http://results.myenterprise.com;
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}
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}
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upstream vote.myenterprise.com {
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zone vote.myenterprise.com_backend 64k;
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server 192.168.99.109:80;
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server 192.168.99.108:80;
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server 192.168.99.109:80;
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server 192.168.99.108:80;
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}
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server {
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listen 80;
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}
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server {
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listen 80;
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server_name vote.myenterprise.com;
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server_name vote.myenterprise.com;
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location / {
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proxy_pass http://vote.myenterprise.com;
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}
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}
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location / {
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proxy_pass http://vote.myenterprise.com;
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}
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}
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include /etc/conf/conf.d/*.conf;
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}
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```
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include /etc/conf/conf.d/*.conf;
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}
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```
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The `http://vote.myenterprise.com` site configuration should point to either
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frontend node. Requests to `http://results.myenterprise.com` go just to the
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single `dbstore` node where the `example-voting-app-result-app` is running.
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The `http://vote.myenterprise.com` site configuration should point to either
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frontend node. Requests to `http://results.myenterprise.com` go just to the
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single `dbstore` node where the `example-voting-app-result-app` is running.
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8. On your local host, edit `/etc/hosts` file add the resolution for both these
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3. On your local host, edit `/etc/hosts` file add the resolution for both these
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sites.
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9. Save and close the `/etc/hosts` file.
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4. Save and close the `/etc/hosts` file.
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10. Restart the `nginx` container.
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5. Restart the `nginx` container.
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Manual restart is required because the current Interlock server is not forcing an
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Nginx configuration reload.
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```bash
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$ docker restart nginx
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```
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```bash
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$ docker restart nginx
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```
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## Task 4. Test the application
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@ -282,24 +282,24 @@ the containers at once. This extra credit
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in the `docker-compose.yml` file. For example,
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this command:
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-e constraint:com.function==worker01 \
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--net="voteapp" \
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--net-alias=workers \
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--name worker01 docker/example-voting-app-worker
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 run -t -d \
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-e constraint:com.function==worker01 \
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--net="voteapp" \
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--net-alias=workers \
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--name worker01 docker/example-voting-app-worker
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```
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Becomes this in a Compose file.
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```
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worker:
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image: docker/example-voting-app-worker
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networks:
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voteapp:
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aliases:
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- workers
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```
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```bash
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worker:
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image: docker/example-voting-app-worker
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networks:
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voteapp:
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aliases:
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- workers
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```
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In general, Compose starts services in reverse order they appear in the file.
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So, if you want a service to start before all the others, make it the last
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@ -313,108 +313,108 @@ result file</a>
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5. Set `DOCKER_HOST` to the Swarm manager.
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```bash
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$ DOCKER_HOST=$(docker-machine ip manager):3376
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```
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```bash
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$ DOCKER_HOST=$(docker-machine ip manager):3376
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```
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6. In the same directory as your `docker-compose.yml` file, start the services.
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```bash
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$ docker-compose up -d
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Creating network "scale_voteapp" with the default driver
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Creating volume "scale_db-data" with default driver
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Pulling db (postgres:9.4)...
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worker01: Pulling postgres:9.4... : downloaded
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dbstore: Pulling postgres:9.4... : downloaded
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frontend01: Pulling postgres:9.4... : downloaded
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frontend02: Pulling postgres:9.4... : downloaded
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Creating db
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Pulling redis (redis:latest)...
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dbstore: Pulling redis:latest... : downloaded
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frontend01: Pulling redis:latest... : downloaded
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frontend02: Pulling redis:latest... : downloaded
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worker01: Pulling redis:latest... : downloaded
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Creating redis
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Pulling worker (docker/example-voting-app-worker:latest)...
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dbstore: Pulling docker/example-voting-app-worker:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-worker:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-worker:latest... : downloaded
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worker01: Pulling docker/example-voting-app-worker:latest... : downloaded
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Creating scale_worker_1
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Pulling voting-app (docker/example-voting-app-voting-app:latest)...
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dbstore: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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worker01: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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Creating scale_voting-app_1
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Pulling result-app (docker/example-voting-app-result-app:latest)...
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dbstore: Pulling docker/example-voting-app-result-app:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-result-app:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-result-app:latest... : downloaded
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worker01: Pulling docker/example-voting-app-result-app:latest... : downloaded
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Creating scale_result-app_1
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```
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```bash
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$ docker-compose up -d
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Creating network "scale_voteapp" with the default driver
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Creating volume "scale_db-data" with default driver
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Pulling db (postgres:9.4)...
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worker01: Pulling postgres:9.4... : downloaded
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dbstore: Pulling postgres:9.4... : downloaded
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frontend01: Pulling postgres:9.4... : downloaded
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frontend02: Pulling postgres:9.4... : downloaded
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Creating db
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Pulling redis (redis:latest)...
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dbstore: Pulling redis:latest... : downloaded
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frontend01: Pulling redis:latest... : downloaded
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frontend02: Pulling redis:latest... : downloaded
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worker01: Pulling redis:latest... : downloaded
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Creating redis
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Pulling worker (docker/example-voting-app-worker:latest)...
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dbstore: Pulling docker/example-voting-app-worker:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-worker:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-worker:latest... : downloaded
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worker01: Pulling docker/example-voting-app-worker:latest... : downloaded
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Creating scale_worker_1
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Pulling voting-app (docker/example-voting-app-voting-app:latest)...
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dbstore: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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worker01: Pulling docker/example-voting-app-voting-app:latest... : downloaded
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Creating scale_voting-app_1
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Pulling result-app (docker/example-voting-app-result-app:latest)...
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dbstore: Pulling docker/example-voting-app-result-app:latest... : downloaded
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frontend01: Pulling docker/example-voting-app-result-app:latest... : downloaded
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frontend02: Pulling docker/example-voting-app-result-app:latest... : downloaded
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worker01: Pulling docker/example-voting-app-result-app:latest... : downloaded
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Creating scale_result-app_1
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```
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9. Use the `docker ps` command to see the containers on the Swarm cluster.
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7. Use the `docker ps` command to see the containers on the Swarm cluster.
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```bash
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$ docker -H $(docker-machine ip manager):3376 ps
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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b71555033caa docker/example-voting-app-result-app "node server.js" 6 seconds ago Up 4 seconds 192.168.99.104:32774->80/tcp frontend01/scale_result-app_1
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cf29ea21475d docker/example-voting-app-worker "/usr/lib/jvm/java-7-" 6 seconds ago Up 4 seconds worker01/scale_worker_1
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98414cd40ab9 redis "/entrypoint.sh redis" 7 seconds ago Up 5 seconds 192.168.99.105:32774->6379/tcp frontend02/redis
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1f214acb77ae postgres:9.4 "/docker-entrypoint.s" 7 seconds ago Up 5 seconds 5432/tcp frontend01/db
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1a4b8f7ce4a9 docker/example-voting-app-voting-app "python app.py" 7 seconds ago Up 5 seconds 192.168.99.107:32772->80/tcp dbstore/scale_voting-app_1
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```
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```bash
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$ docker -H $(docker-machine ip manager):3376 ps
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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b71555033caa docker/example-voting-app-result-app "node server.js" 6 seconds ago Up 4 seconds 192.168.99.104:32774->80/tcp frontend01/scale_result-app_1
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cf29ea21475d docker/example-voting-app-worker "/usr/lib/jvm/java-7-" 6 seconds ago Up 4 seconds worker01/scale_worker_1
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98414cd40ab9 redis "/entrypoint.sh redis" 7 seconds ago Up 5 seconds 192.168.99.105:32774->6379/tcp frontend02/redis
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1f214acb77ae postgres:9.4 "/docker-entrypoint.s" 7 seconds ago Up 5 seconds 5432/tcp frontend01/db
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1a4b8f7ce4a9 docker/example-voting-app-voting-app "python app.py" 7 seconds ago Up 5 seconds 192.168.99.107:32772->80/tcp dbstore/scale_voting-app_1
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```
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When you started the services manually, you had a
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`voting-app` instances running on two frontend servers. How many
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do you have now?
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10. Scale your application up by adding some `voting-app` instances.
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8. Scale your application up by adding some `voting-app` instances.
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```bash
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$ docker-compose scale voting-app=3
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Creating and starting 2 ... done
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Creating and starting 3 ... done
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```
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```bash
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$ docker-compose scale voting-app=3
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Creating and starting 2 ... done
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Creating and starting 3 ... done
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```
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|
||||
After you scale up, list the containers on the cluster again.
|
||||
|
||||
7. Change to the `loadbalancer` node.
|
||||
9. Change to the `loadbalancer` node.
|
||||
|
||||
```bash
|
||||
$ eval $(docker-machine env loadbalancer)
|
||||
```
|
||||
```bash
|
||||
$ eval $(docker-machine env loadbalancer)
|
||||
```
|
||||
|
||||
7. Restart the Nginx server.
|
||||
10. Restart the Nginx server.
|
||||
|
||||
```bash
|
||||
$ docker restart nginx
|
||||
```
|
||||
8. Check your work again by visiting the `http://vote.myenterprise.com` and
|
||||
11. Check your work again by visiting the `http://vote.myenterprise.com` and
|
||||
`http://results.myenterprise.com` again.
|
||||
|
||||
9. You can view the logs on an individual container.
|
||||
12. You can view the logs on an individual container.
|
||||
|
||||
```bash
|
||||
$ docker logs scale_voting-app_1
|
||||
* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
|
||||
* Restarting with stat
|
||||
* Debugger is active!
|
||||
* Debugger pin code: 285-809-660
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:44] "GET / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:44] "GET /static/stylesheets/style.css HTTP/1.0" 304 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:45] "GET /favicon.ico HTTP/1.0" 404 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:22:24] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:37] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:39] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:40] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:41] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:43] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:44] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:46] "POST / HTTP/1.0" 200 -
|
||||
```
|
||||
```bash
|
||||
$ docker logs scale_voting-app_1
|
||||
* Running on http://0.0.0.0:80/ (Press CTRL+C to quit)
|
||||
* Restarting with stat
|
||||
* Debugger is active!
|
||||
* Debugger pin code: 285-809-660
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:44] "GET / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:44] "GET /static/stylesheets/style.css HTTP/1.0" 304 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:15:45] "GET /favicon.ico HTTP/1.0" 404 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:22:24] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:37] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:39] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:40] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:41] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:43] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:44] "POST / HTTP/1.0" 200 -
|
||||
192.168.99.103 - - [11/Apr/2016 17:23:46] "POST / HTTP/1.0" 200 -
|
||||
```
|
||||
|
||||
This log shows the activity on one of the active voting application containers.
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue