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docker compose前身是Figc;它是一个运行多个docker容器的工具c;使用 docker compose不再需要使用sHell脚本来启动容器c;适合组合使用多个容器进行并发的场景
YAML是一种标记语言很直观的数据序列化格式
YAML格式:
字段 | 描述 | @H_772_71@build dockerfile context | 指定Dockerfile文件名构建镜像上下文路径 | @H_772_71@image | 指定镜像 | @H_772_71@command | 执行命令c;覆盖默认命令 | @H_772_71@container name | 指定容器名称 | @H_772_71@deploy | 指定部署和运行服务相关配置c;只能在Swarm模式使用 | @H_772_71@environment | 添加环境变量 | @H_772_71@networks | 加入网络 | @H_772_71@ports | 暴露容器端口c;与-p相同c;但端口不能低于60 | @H_772_71@volumes | 挂载宿主机路径或命令卷 | @H_772_71@restart | 重启策略c;默认noc;alwaysc;no-failurec;unless-stoped | @H_772_71@hostname | 容器主机名 |
---|
build | 重新构建服务 | @H_772_71@ps | 列出容器 | @H_772_71@up | 创建和启动容器 | @H_772_71@exec | 在容器里面执行命令 | @H_772_71@scale | 指定一个服务容器启动数量 | @H_772_71@top | 显示容器进程 | @H_772_71@logs | 查看容器输出 | @H_772_71@down | 删除容器、网络、数据卷和镜像 | @H_772_71@stop/start/restart | 停止/启动/重启服务 |
---|
Consul是HashiCorp公司推出的开源工具c;用于实现分布式系统的服务发现与配置
特性:
设备:192.168.118.44(Docker-ce、 Compose 3、Consul、 Consul-template) 192.168.118.88(Docker-ce、registrator)
192.168.118.44:
[root@docker ~]# mkdir whd
[root@docker ~]# cd compose_nginx
[root@docker compose_nginx]# mkdir nginx wwwroot
[root@docker compose_nginx]# cd nginx/
[root@docker nginx]# touch Dockerfile
[root@docker nginx]# cd ../tomcat/
[root@docker tomcat]# touch Dockerfile
[root@docker tomcat]# cd ..
[root@docker compose_nginx]# yum install -y tree
[root@docker compose_nginx]# tree -L 2
.
├── nginx
│ ├── Dockerfile
│ └── nginx-1.15.9.tar.gz
└── wwwroot
└── Dockerfile
[root@docker compose_nginx]# cd nginx
[root@docker nginx]# vim Dockerfile ##编写Dockerfile
FROM centos:7 as build
ADD nginx-1.15.9.tar.gz /opt
WORKDIR /opt/nginx-1.15.9
RUN yum install -y gcc pcre pcre-devel devel zlib-devel @H_347_311@make &> /dev/null &&
yum clean all &&
sed -i 's/CFLAGS="$CFLAGS -g"/#CFLAGS="$CFLAGS -g"/g' auto/cc/gcc &&
./configure --prefix=/usr/local/nginx &> /dev/null &&
@H_347_311@make &> /dev/null &&
@H_347_311@make install &> /dev/null &&
rm -rf /opt/nginx-1.15.9
FROM centos:7
EXPOSE 80
VOLUME ["/usr/local/nginx/html"]
COPY --from=build /usr/local/nginx /usr/local/nginx
CMD ["/usr/local/nginx/sbin/nginx","-g","daemon off;"]
[root@docker nginx]# cd ../wwwroot/
[root@docker wwwroot]# vim index.html
this is NG web
[root@docker ~]# cp docker-compose /usr/local/bin
[root@docker ~]# chmod +x /usr/local/bin/docker-compose
[root@docker compose_nginx]# vim docker-compose.yml
version: '3'
services:
nginx:
hostname: nginx
build:
context: ./nginx
dockerfile: Dockerfile
ports:
- 1216:80
- 1217:443
networks:
- cluster
volumes:
- ./wwwroot:/usr/local/nginx/html
networks:
cluster:
[root@docker compose_nginx]# docker-compose -f docker-compose.yml up -d
[root@docker compose_nginx]# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------------------------------------------------------
compose_nginx_nginx_1 /usr/local/nginx/sbin/ngin ... Up 0.0.0.0:1217->443/tcp,:::1217->443/tcp,
0.0.0.0:1216->80/tcp,:::1216->80/tcp
设备:centos7c;安装dockers(consul、registrator(自动发现)c;template(更新)) 192.2168.118.44:
[root@docker ~]# mkdir consul
[root@docker ~]# cd consul/
[root@docker consul]# unzip consul_0.9.2_linux_amd64.zip
Archive: consul_0.9.2_linux_amd64.zip
inflaTing: consul
[root@cons[root@consul consul]# consul agent
> -server
> -bootstrap
> -ui
> -data-dir=/var/lib/consul-data
> -bind=192.168.118.44
> -client=0.0.0.0
> -node=consul-server01 &> /var/log/consul.log &
ul consul]# mv consul /usr/bin
[root@docker consul]# jobs
[1]+ 运行中 consul agent -server -bootstrap -ui -data-dir=/var/lib/consul-data -bind=192.168.118.44 -client=0.0.0.0 -node=consul-server01 &>/var/log/consul.log &
##查看集群信息
[root@docker consul]# consul members
Node Address Status Type Build Protocol DC
consul-server01 192.168.118.44:8301 alive server 0.9.2 2 dc1
[root@docker
consul]# consul info | grep leader
leader = true
leader_addr = 192.168.118.44:8300
root@docker nginx]# docker run -d ## 安装 Gliderlabs/Registrator Gliderlabs/Registrator
> --name=registrator
> --net=host
> -v /var/run/docker.sock:/tmp/docker.sock
> --restart=always
> gliderlabs/registrator:latest
> -ip=192.168.118.88
> consul://192.168.118.44:8500
##测试服务发现功能是否正常
[root@docker nginx]# docker run -itd -p:83:80 --name test-01 -h test01 nginx
[root@docker nginx]# docker run -itd -p:84:80 --name test-02 -h test02 nginx
[root@docker nginx]# docker run -itd -p:88:80 --name test-03 -h test03 httpd
[root@docker nginx]# docker run -itd -p:89:80 --name test-04 -h test04 httpd
浏览器访问192.168.118.44:8500c;查看添加的容器服务
192.168.118.44节点上安装配置
[root@docker consul]# vim /root/consul/nginx.ctmpl
upstream http_BACkend {
{{range service "nginx"}}
server {{.Address}}:{{.Port}}; #此处引用的变量会指向后端的地址和端口(动态变化)
{{end}}
}
server {
listen 83;
server_name localhost 192.168.118.44; #反向代理的IP地址(前端展示的NG服务的Ip)
access_log /var/log/nginx/whd.cn-access.log;
index index.html index.php;
LOCATIOn / {
proxy_set_header HOST $host;
proxy_set_header X-Real-IP $remote_addr; #后端真实IP
proxy_set_header Client-IP $remote_addr;
proxy_set_header X-ForWARDed-For $proxy_add_x_forWARDed_for; #转发地址
proxy_pass http://http_BACkend;
}
}
[root@docker consul]# yum install gcc pcre-devel zlib-devel -y
[root@docker consul]# tar zxvf nginx-1.12.2.tar.gz -C /opt
[root@docker consul]# cd /opt/nginx-1.12.2/
[root@docker nginx-1.12.2]# ./configure --prefix=/usr/local/nginx
[root@docker nginx-1.12.2]# make && make install
[root@docker nginx-1.12.2]# vim /usr/local/nginx/conf/nginx.conf ##修改配置文件
[root@docker nginx-1.12.2]# mkdir /usr/local/nginx/conf/vhost #创建虚拟机目录
[root@docker nginx-1.12.2]# mkdir /var/log/nginx ##创建日志文件目录
[root@docker nginx-1.12.2]# /usr/local/nginx/sbin/nginx ##启动nginx
[root@docker nginx-1.12.2]# netstat -antp | grep nginx
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 28727/nginx: master
[root@docker opt]# unzip consul-template_0.19.3_linux_amd64.zip ##上去consul-template包并解压
Archive: consul-template_0.19.3_linux_amd64.zip
inflaTing: consul-template
[root@docker opt]# mv consul-template /usr/bin/
##关联nginx 虚拟目录中的子配置文件
[root@docker opt]# consul-template -consul-addr 192.168.118.44:8500
> -template "/root/consul/nginx.ctmpl:/usr/local/nginx/conf/vhost/whd.conf:/usr/local/nginx/sbin/nginx -s reload"
> --log-level=info
##再开另一个终端查看
[root@docker opt]# cat /usr/local/nginx/conf/vhost/whd.conf
upstream http_BACkend {
server 192.168.118.88:83;
server 192.168.118.88:84;
}
server {
listen 83;
server_name localhost 192.168.226.128;
access_log /var/log/nginx/whd.cn-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;
}
}
[root@server docker]# docker run -itd -p:85:80 --name test-06 -h test06 nginx
dcc0eb9e689df6ef3128b4474627bbc85e4f8229f99c081888aa91425c3192c3
[root@docker opt]# consul-template -consul-addr 192.168.118.44:8500 -template "/root/consul/nginx.ctmpl:/usr/local/nginx/conf/vhost/whd.conf:/usr/local/nginx/sbin/nginx -s reload" --log-level=info
[root@docker opt]# cat /usr/local/nginx/conf/vhost/whd.conf
upstream http_BACkend {
server 192.168.118.88:83;
server 192.168.118.88:84;
server 192.168.118.88:85; ##可以看到我们添加的nginx服务
}
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