监控神器Prometheus（10）

# 下载consul
wget https://releases.hashicorp.com/consul/1.6.0/consul_1.6.0_linux_amd64.zip

# 解压安装
unzip consul_${CONSUL_VERSION}_linux_amd64.zip
chown root:root consul
mv consul /usr/local/bin/
consul --version

# 启用自动补全
consul -autocomplete-install
complete -C /usr/local/bin/consul consul

# 创建用户和目录
useradd -M -s /sbin/nologin consul
mkdir /data/consul/server{1..3}/{data,config}
chown -R consul.consul /data/consul/

# 配置Systemd

# consul-server1
cat > /lib/systemd/system/consul-server1.service << EOF
[Unit]
Description="consul server1"
Requires=network-online.target
After=network-online.target

[Service]
User=consul
Group=consul
ExecStart=/usr/local/bin/consul agent -config-dir=/data/consul/server1/config
ExecReload=/usr/local/bin/consul reload
KillMode=process
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

# consul-server2
cat > /lib/systemd/system/consul-server2.service << EOF
[Unit]
Description="consul server2"
Requires=network-online.target
After=network-online.target

[Service]
User=consul
Group=consul
ExecStart=/usr/local/bin/consul agent -config-dir=/data/consul/server2/config
ExecReload=/usr/local/bin/consul reload
KillMode=process
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

# consul-server3
cat > /lib/systemd/system/consul-server3.service << EOF
[Unit]
Description="consul server3"
Requires=network-online.target
After=network-online.target

[Service]
User=consul
Group=consul
ExecStart=/usr/local/bin/consul agent -config-dir=/data/consul/server3/config
ExecReload=/usr/local/bin/consul reload
KillMode=process
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF
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# 生成密钥
CONSUL_KEY=`consul keygen`

# 生成http_acl_token，写入config.json，
consul acl bootstrap
export CONSUL_HTTP_TOKEN='your_token'

# node_id 一定不可以重复

# 创建server1配置文件
cat > /data/consul/server1/config/config.json << EOF
{
  "datacenter": "prometheus",
  "bind_addr":"172.26.42.229",
  "log_level": "INFO",
  "node_id":"09d82408-bc4f-49e0-5555-61ef1d4842f7",
  "node_name": "server1",
  "data_dir":"/data/consul/server1/data",
  "server": true,
  "bootstrap_expect": 3,
  "encrypt": "${CONSUL_KEY}",
  "ui":true,
  "client_addr":"0.0.0.0",
  "retry_join":["172.26.42.229:8301","172.26.42.229:28301","172.26.42.229:38301"],
  "ports": {
     "http": 8500,
     "dns": 8600,
     "serf_lan":8301,
     "serf_wan":8302,
     "server":8300,
     "grpc":8400
  },
  "acl": {
    "enabled": true,
    "default_policy": "deny",
    "down_policy": "extend-cache",
    "tokens":{
        "master":"${CONSUL_HTTP_TOKEN}",
        "agent":"${CONSUL_HTTP_TOKEN}"
    }
  }
}
EOF

# 创建server2配置文件
cat > /data/consul/server2/config/config.json << EOF
{
  "datacenter": "prometheus",
  "bind_addr":"172.26.42.229",
  "log_level": "INFO",
  "node_id":"613ccd6e-68d1-3bbd-6666-3cbc450f019d",
  "node_name": "server2",
  "data_dir":"/data/consul/server2/data",
  "server": true,
  "bootstrap_expect": 3,
  "encrypt": "${CONSUL_KEY}",
  "ui":true,
  "client_addr":"0.0.0.0",
  "retry_join":["172.26.42.229:8301","172.26.42.229:28301","172.26.42.229:38301"],
  "ports": {
     "http": 28500,
     "dns": 28600,
     "serf_lan":28301,
     "serf_wan":28302,
     "server":28300,
     "grpc":28400
  },
  "acl": {
    "enabled": true,
    "default_policy": "deny",
    "down_policy": "extend-cache",
    "tokens":{
        "master":"${CONSUL_HTTP_TOKEN}",
        "agent":"${CONSUL_HTTP_TOKEN}"
    }
  }
}
EOF

# 创建server3配置文件
cat > /data/consul/server3/config/config.json << EOF
{
  "datacenter": "prometheus",
  "bind_addr":"172.26.42.229",
  "log_level": "INFO",
  "node_id":"d8a09ffd-7ccb-84bd-7777-8d8b7a01951e",
  "node_name": "server3",
  "data_dir":"/data/consul/server3/data",
  "server": true,
  "bootstrap_expect": 3,
  "encrypt": "${CONSUL_KEY}",
  "ui":true,
  "client_addr":"0.0.0.0",
  "retry_join":["172.26.42.229:8301","172.26.42.229:28301","172.26.42.229:38301"],
  "ports": {
     "http": 38500,
     "dns": 38600,
     "serf_lan":38301,
     "serf_wan":38302,
     "server":38300,
     "grpc":38400
  },
  "acl": {
    "enabled": true,
    "default_policy": "deny",
    "down_policy": "extend-cache",
    "tokens":{
        "master":"${CONSUL_HTTP_TOKEN}",
        "agent":"${CONSUL_HTTP_TOKEN}"
    }
  }
}
EOF
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