ELB+Swarm+Compose+Consul+Registratorで夢は叶うのか(1)

# 目的

ELB配下に複数のUbuntuインスタンスを置き、それぞれのNginxに対してConsul+Registratorを使ってコンテナを自動でぶら下げたい

コンテナの制御はSwarm+Composeで実現したい
さて夢は叶うのだろうか

# 環境

|ホスト名|IPアドレス|
|---|---|
|docker00|10.10.0.49|
|docker01|10.10.0.50|
|docker02|10.10.0.51|
|dockerman|10.10.0.110|

Amazon VPC内にUbuntuで作成した

# Docker導入x4
```bash
$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9

$ sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"
$ sudo apt-get update
$ sudo apt-get install -y lxc-docker
```

## Docker Remote APIの有効化

```/etc/default/docker
DOCKER_OPTS="-H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --insecure-registry=10.10.0.110:5000"
```

ついでにプライベートなレジストリへのアクセスも許可

## 再起動

```bash
$ sudo service docker restart
```

## API確認

2375/tcpをそれぞれ疎通確認

```bash
$ docker -H 10.10.0.49:2375 ps -a
$ docker -H 10.10.0.50:2375 ps -a
$ docker -H 10.10.0.51:2375 ps -a
$ docker -H 10.10.0.110:2375 ps -a
```

# Docker-Compose導入x4

```bash
# curl -L https://github.com/docker/compose/releases/download/1.1.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

# chmod +x /usr/local/bin/docker-compose
```

# Swarm導入

## トークンの取得

どれか1台で実行して取得

```bash
# docker run --rm swarm create
Unable to find image 'swarm:latest' locally
511136ea3c5a: Pull complete
ae115241d78a: Pull complete
f49087514537: Pull complete
fff73787bd9f: Pull complete
97c8f6e912d7: Pull complete
33f9d1e808cf: Pull complete
62860d7acc87: Pull complete
bf8b6923851d: Pull complete
swarm:latest: The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security.
Status: Downloaded newer image for swarm:latest
c8e73fe4b34710e915089846d21aef1f
```

## Swarmエージェントとホストの起動

dockermanにはマネージャを入れ、docker00,docker01,docker02にはエージェントだけを起動させる

```bash
# mkdir -p /root/docker-host/boot
# cd /root/docker-host/boot
# nano docker-compose.yml
```

Docker00用

```docker-compose.yml
swarmagent:
  image: swarm:latest
  command: join --addr=10.10.0.49:2375 token://c8e73fe4b34710e915089846d21aef1f
```

Docker01用

```docker-compose.yml
swarmagent:
  image: swarm:latest
  command: join --addr=10.10.0.50:2375 token://c8e73fe4b34710e915089846d21aef1f
```


Docker02用

```docker-compose.yml
swarmagent:
  image: swarm:latest
  command: join --addr=10.10.0.51:2375 token://c8e73fe4b34710e915089846d21aef1f
```

Dockerman用

```
registry:
  image: registry
  environment:
  - SETTINGS_FLAVOR=s3
  - AWS_BUCKET=private-docker
  - AWS_KEY=(access-key)
  - AWS_SECRET=(secret-key)
  - AWS_REGION=us-east-1
  - SEARCH_BACKEND=sqlalchemy
  ports:
  - "5000:5000"

manager:
  image: swarm:latest
  command: manage --strategy random token://c8e73fe4b34710e915089846d21aef1f
  ports:
  - "2380:2375"
```
S3を使ったDocker Registryも利用する予定。

> `--strategy`オプションはbinpackingとrandomが選べるのだけどbinpackingが予想通りの動きをしなかったので今回はrandomとした

それぞれを立ち上げよう

Docker00〜Docker02

```bash
# docker-compose up -d
Creating boot_swarmagent_1...
# docker-compose ps
      Name                     Command               State    Ports
---------------------------------------------------------------------
boot_swarmagent_1   /swarm join --addr=10.10.0 ...   Up      2375/tcp
```

Dockerman

```bash
# docker-compose up -d
Creating boot_registry_1...
Creating boot_swarmmanager_1...
# docker-compose ps
       Name                      Command               State           Ports
-------------------------------------------------------------------------------------
boot_registry_1       docker-registry                  Up      0.0.0.0:5000->5000/tcp
boot_swarmmanager_1   /swarm manage --strategy r ...   Up      0.0.0.0:2380->2375/tcp
```


## ノードが全部検出されているか確認

Dockermanから各ノードを確認する

```bash
# docker -H tcp://localhost:2380 info
Containers: 3
Nodes: 3
 ip-10-10-0-49: 10.10.0.49:2375
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.954 GiB
 ip-10-10-0-51: 10.10.0.51:2375
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.954 GiB
 ip-10-10-0-50: 10.10.0.50:2375
  └ Containers: 1
  └ Reserved CPUs: 0 / 1
  └ Reserved Memory: 0 B / 1.954 GiB
```

素敵じゃないか

次の記事 : <a href="http://qiita.com/zERobYTe/items/c37904c20546b3092371">ELB+Swarm+Compose+Consul+Registratorで夢は叶うのか(2)</a>