Nomad是HashCorp的一款开源的编排工具,同样身为HashCorp的服务发现工具consul能够很好的与Nomad进行集成，2个轻量级别的工具可以很好的支持微服务的快速发布。这里会简单的说一下nomad的集群以及consul集群的集成

系统环境

Ubuntu 17.04
Docker 17.03.1-ce
Consul 0.9
Nomad 0.5.6
Nomad master 192.168.99.100
Nomad node1 192.168.99.101
Nomad node2 192.168.99.103
Consul master 192.168.99.102

本文中的Nomad都是基于docker安装的.

一. Nomad master 安装（Nomad master)

安装Nomad agent
1. 准备好配置文件 config.hcl 并将它放在/opt/nomad/config目录中

name = "master"

bind_addr = "192.168.99.100" # the default

server_service_name="nomad-server"
client_service_name="nomad-client"

data_dir  = "/nomad/data"

advertise {
  # Defaults to the node's hostname. If the hostname resolves to a loopback
  # address you must manually configure advertise addresses.
  http = "192.168.99.100:4646"
  rpc  = "192.168.99.100:4647"
  serf = "192.168.99.100:4648" # non-default ports may be specified
}
disable_update_check = true
server {
  enabled          = true
  bootstrap_expect = 3
}

client {
  enabled       = true
  network_speed = 10
  options {
    "driver.raw_exec.enable" = "1"
  }
}

consul {
  address = "192.168.99.102:8500"
}

atlas {
  infrastructure = "hashicorp/mars"
  token          = "atlas.v1.AFE84330943"
}

执行以下docker 命令来创建nomad master实例

docker run -d --name nomad --net host  \
-v "/opt/nomad/data:/data" \
-v "/opt/nomad/config:/config" \
-v "/var/run/docker.sock:/var/run/docker.sock" \
-v "/tmp:/tmp" makeomatic/nomad

安装Counsul agent
1. 安装consul
  1. 下载安装文件consul.zip
准备好配置文件config.hcl并将文件放在/opt/consul/config目录中

{
    "datacenter": "global",
    "data_dir": "/data/consul", #确保有/data/consul目录
    "log_level": "INFO",
    "node_name": "nomadmaster.local",
    "server": false,
    "advertise_addr": "192.168.99.100",
    "addresses": {
      "http": "0.0.0.0"
    },
    "ui":true,
    "ports": {
      "https": -1
    },
    "check": {
      "id": "c1-check",
      "name": "http on port 8500",
      "http": "http://172.16.30.100:8500/",
      "interval": "5s",
      "timeout": "1s"
    },
    "start_join": ["192.168.99.102"],
    #"retry_join":["172.16.30.102", "172.16.30.103"],
    "bootstrap_expect":1,
    "retry_interval": "30s"
}

启动consul agent

consul agent -config-dir=/opt/consul/config

二. Node 安装(Nomad node1和Nomad node2)

node2的安装请参考node1

安装Nomad agent
1. 准备好配置文件 config.hcl 并将它放在/opt/nomad/config目录中

name = "node01"

bind_addr = "192.168.99.101" # the default

server_service_name="nomad-server"
client_service_name="nomad-client"

data_dir  = "/nomad/data"

advertise {
  # Defaults to the node's hostname. If the hostname resolves to a loopback
  # address you must manually configure advertise addresses.
  http = "192.168.99.101:4646"
  rpc  = "192.168.99.101:4647"
  serf = "192.168.99.101:4648" # non-default ports may be specified
}
disable_update_check = true
server {
  enabled          = true
  bootstrap_expect = 3
}

client {
  enabled       = true
  network_speed = 10
  options {
    "driver.raw_exec.enable" = "1"
  }
}

consul {
  address = "192.168.99.102:8500"
}

atlas {
  infrastructure = "hashicorp/mars"
  token          = "atlas.v1.AFE84330943"
}

执行以下docker 命令来创建nomad master实例

docker run -d --name nomad --net host  \
-v "/opt/nomad/data:/data" \
-v "/opt/nomad/config:/config" \
-v "/var/run/docker.sock:/var/run/docker.sock" \
-v "/tmp:/tmp" makeomatic/nomad

安装Counsul agent
1. 安装consul
  1. 下载安装文件consul.zip
准备好配置文件config.hcl并将文件放在/opt/consul/config目录中

{
    "datacenter": "global",
    "data_dir": "/data/consul", #确保有/data/consul目录
    "log_level": "INFO",
    "node_name": "nomad01.local",
    "server": false,
    "advertise_addr": "192.168.99.101",
    "addresses": {
      "http": "0.0.0.0"
    },
    "ui":true,
    "ports": {
      "https": -1
    },
    "check": {
      "id": "c1-check",
      "name": "http on port 8500",
      "http": "http://172.16.30.101:8500/",
      "interval": "5s",
      "timeout": "1s"
    },
    "start_join": ["192.168.99.102"],
    #"retry_join":["172.16.30.102", "172.16.30.103"],
    "bootstrap_expect":1,
    "retry_interval": "30s"
}

启动consul agent

consul agent -config-dir=/opt/consul/config

三. Consul Server安装

安装Counsul agent
1. 安装consul
  1. 下载安装文件consul.zip
准备好配置文件config.hcl并将文件放在/opt/consul/config目录中

{
    "datacenter": "global",
    "data_dir": "/data/consul", #确保有/data/consul目录
    "log_level": "INFO",
    "node_name": "consul.local",
    "server": true,
    "advertise_addr": "192.168.99.102",
    "addresses": {
      "http": "0.0.0.0"
    },
    "ui":true,
    "ports": {
      "https": -1
    },
    "check": {
      "id": "c1-check",
      "name": "http on port 8500",
      "http": "http://192.168.99.102:8500/",
      "interval": "5s",
      "timeout": "1s"
    },
    "start_join": ["192.168.99.102"],
    #"retry_join":["172.16.30.102", "172.16.30.103"],
    "bootstrap_expect":1,
    "retry_interval": "30s"
}

启动consul agent

consul agent -config-dir=/opt/consul/config

四.验证

nomad验证

执行 nomad node-staus 可以看到类似的信息

$ nomad server-members
ID        Datacenter  Name   Class   Drain  Status
fca62612  dc1         nomad  <none>  false  ready
c887deef  dc1         nomad  <none>  false  ready
c887deef  dc1         nomad  <none>  false  ready

可以看到3个节点的信息

查看consul

打开http://192.168.99.102:8500 可以看到所有的consul节点的服务信息，每个节点包含的nomad服务信息也可以看到

自此所有的服务都搭建完毕，我们可以通过nomad与consul的集群服务来快速的发布相应的微服务。

搭建Nomad服务与Consul集成

系统环境

一. Nomad master 安装（Nomad master)

二. Node 安装(Nomad node1和Nomad node2)

三. Consul Server安装

四.验证