docker consul
一、Consul概述
1、consul简介
consul是一个服务发现和注册的工具,具有分布式、搞扩展性能特点。
2、consul特点
(1)支持健康检查,允许储存值对
(2)基于Golong语言,可移植性强
(3)支持ACL访问量控制(与docker等轻量级容器可无缝配合)
3、docker consul容器服务更新与发现
解读:建立consul服务
(1)每个提供服务的节点上都要部署和允许consul的agent
(2)consul agent有两个运行模式(server、client)
(3)server和cilent只是consul群集层面的区分,与搭建在cluster之上的应用服务无关
二、部署
1、server部署(192.168.177.33)
(需要安装docker-ce、compose、consul、consul-template)
mkdir /root/consul
cd consul
rz consul_0.9.2_linux_amd64.zip
unzip consul_0.9.2_linux_amd64.zip
mv consul /usr/bin
consul agent \
-server \
-bootstrap \
-ui \
-data-dir=/var/lib/consul-data \
-bind=192.168.177.33 \
-client=0.0.0.0 \
-node=consul-server01 &> /var/log/consul.log &
consul members
consul info | grep leader
2、client部署(192.168.177.8)
容器服务自动加入nginx集群
安装Gliderlabs/Registrator Gliderlabs/Registrator
可检查容器运行状态自动注册,还可注销docker容器的服务 到服务配置中心
目前支持Consul、Etcd和SkyDNS2
在192.168.177.8节点上,执行以下操作
docker run -d \
--name=registrator \
--net=host \
-v /var/run/docker.sock:/tmp/docker.sock \
--restart=always \
gliderlabs/registrator:latest \
-ip=192.168.177.8 \
consul://192.168.177.33:8500
systemctl restart docker
docker run -itd -p:81:80 --name test-01 -h test01 nginx
docker run -itd -p:82:80 --name test-02 -h test02 nginx
docker run -itd -p:83:80 --name test-03 -h test03 httpd
docker run -itd -p:84:80 --name test-04 -h test04 httpd
打开浏览器访问http://192.168.177.33:8500
3、配置template模块自动更新
server(192.168.177.33)
cd consul/
vim nginx.ctmpl
upstream http_backend {
{{range service "nginx"}}
server {{.Address}}:{{.Port}};
{{end}}
}
server {
listen 100;
server_name localhost 192.168.177.33;
access_log /var/log/nginx/lic.com-access.log;
index index.html index.php;
location / {
proxy_set_header HOST $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Client-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://http_backend;
}
}
====>:wq
yum -y install gcc pcre-devel zlib-devel
rz nginx-1.12.0.tar.gz
tar zxvf nginx-1.12.0.tar.gz -C /opt
cd /opt/nginx-1.12.0
./configure --prefix=/usr/local/nginx
make && make install
vim /usr/local/nginx/conf/nginx.conf
//19 include vhost/*.conf;
cd /usr/local/nginx/conf/
mkdir vhost
mkdir /var/log/nginx
/usr/local/nginx/sbin/nginx
cd /opt
rz consul-template_0.19.3_linux_amd64.zip
unzip consul-template_0.19.3_linux_amd64.zip
mv consul-template /usr/bin
consul-template -consul-addr 192.168.177.33:8500 -template "/root/consul/nginx.ctmpl:/usr/local/nginx/conf/vhost/lic.conf:/usr/local/nginx/sbin/nginx -s reload" --log-level=info
再打开一个终端
192.168.177.8
docker run -itd -p:85:80 --name test-05 -h test05 nginx
4、测试访问代理服务器
http://192.168.177.33:100/
docker logs -f test-01
docker logs -f test-02
docker logs -f test-05