文章目录
- 一、Docker-compose容器编排
- 1.1 docker-compose简介
- 1.2 docker-compose的常用字段
- 1.3 docker-compose常用字段
- 1.4 实例
- 二、consul容器服务更新与发现
- 2.1 配置consul服务器:
- 2.2 通过httpd api可以获取集群信息
- 2.3 配置容器服务自动加入NGINX集群
- 2.4 查看效果
- 测试服务是否正常
- 2.5 删除一个容器,验证自动删除容器效果
- 三、consul-template
- 3.1 consu-template介绍
- 3.2 准备template nginx模板文件
- 3.3 编译安装nginx
- 3.4 创建虚拟主机目录和日志文件目录
- 3.5 启动nginx
- 3.6 配置启动template
- 3.6 在服务端新建一个容器节点,查看跟新内容
- 3.7 删除一个容器查看配置文件变化
- 3.8 使用logs命令,查看nginx容器日志,可以发现是处于轮询状态,都是现实来自同一个ip的访问
一、Docker-compose容器编排
1.1 docker-compose简介
1、docker-compose是一个定义以及运行多个docker容器的工具
2、使用docke-compose不需要使用shell脚本来启动容器
3、docker-compose非常适合组合使用多个容器进行开发的场景
4、docker-compose的文件结构是yaml文件,其编写规则如下:
- 不支持制表符tab缩进,需要使用空格缩进
- 通常开头缩进两个空格
- 字符后缩进一个字符,如冒号、逗号、横杠
- 用#注释
- 如果包含特殊字符用单引号
- 布尔值必须用引号括起来
1.2 docker-compose的常用字段
字段 | 描述 |
build dockerfile context | 指定dockerfile文件名构建镜像上下文路径 |
image | 指定镜像 |
command | 执行命令,覆盖默认命令 |
container name | 指定容器名称,优于容器名称是唯一的,如果指定自定义名称,则无法scale |
deploy | 指定部署和运行服务相关配置,只能在swarm模式中使用 |
environment | 添加环境变量 |
networks | 加入网络 |
ports | 暴露容器端口,与-p相同,但是端口不能低于60 |
volumes | 挂载宿主机路径或命令卷 |
restart | 重启策略,默认 no,always,no-failure,unless-stoped |
hostname | 容器主机名 |
1.3 docker-compose常用字段
字段 | 描述 |
build | 重新构建服务 |
ps | 列出容器 |
up | 创建和启动容器 |
exec | 在容器里面执行命令 |
scale | 指定一个服务容器启动数量 |
top | 显示容器进程 |
logs | 查看容器输出 |
down | 删除容器、网络、数据卷和镜像 |
stop\start\restart | 停止\启动\重启服务 |
1.4 实例
##daocloud下载安装docker-compose
sudo curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
## 添加可执行权限
sudo chmod +x /usr/local/bin/docker-compose
## 测试安装结果
docker-compose --version
## 创建nginx工作目录
[root@nginx-php]# mkdir -p /root/compose_nginx/nginx
[root@nginx-php]# cd compose_nginx/nginx/
## 创建dockerfile
[root@nginx-php nginx]# vim Dockerfile
FROM centos:7
RUN yum -y update
RUN yum -y install make gcc gcc-gcc pcre-devel zlib-devel
RUN useradd -M -s /sbin/nologin nginx
ADD nginx-1.12.2.tar.gz /usr/local/src
WORKDIR /usr/local/src/nginx-1.12.2
RUN ./configure \
--prefix=/usr/local/nginx \
--user=nginx \
--group=nginx \
--with-http_stub_status_module && make && make install
ENV PATH /usr/local/nginx/sbin:$PATH
EXPOSE 80
EXPOSE 443
RUN echo "daemon off;" >> /usr/local/nginx/conf/nginx.conf
ADD run.sh /run.sh
RUN chmod 755 /run.sh
CMD ["/run.sh"]
[root@nginx-php nginx]# vim run.sh
#!/bin/bash
/usr/local/nginx/sbin/nginx
## 创建yml文件
[root@nginx-php compose_nginx]# vim docker-compose.yml
version: '3'
services:
nginx:
hostname: nginx
build:
context: ./nginx
dockerfile: Dockerfile
ports:
- 1216:80
- 1217:443
networks:
- abc
volumes:
- ./wwwroot:/usr/local/nginx/html
networks:
abc:
## 编写网页
[root@nginx-php compose_nginx]# mkdir wwwroot && cd wwwroot
[root@nginx-php wwwroot]# vi index.html
<h1>this is docker-compose</h1>
## 开启docker-compose
[root@nginx-php compose_nginx]# docker-compose -f docker-compose.yml up -d
## 查看容器运行是否up
[root@nginx-php compose_nginx]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
76ada8a0b0c2 compose_nginx_nginx "/run.sh" 28 minutes ago Up 28 minutes 0.0.0.0:1216->80/tcp, 0.0.0.0:1217->443/tcp compose_nginx_nginx_1
访问网页验证
二、consul容器服务更新与发现
2.1 配置consul服务器:
[root@consul ~]# mkdir consul && cd consul
[root@consul consul]# unzip consul_0.9.2_linux_amd64.zip
[root@consul consul]# mv consul /usr/bin/
## 建立consul服务:
[root@consul consul]# consul agent -server -bootstrap -ui -data-dir=/var/lib/consul-data -bind=192.168.10.60 -client=0.0.0.0 -node=consul-server01 &> /var/log/consul.log &
[1] 23185
## 查看集群信息
[root@consul consul]# consul members
Node Address Status Type Build Protocol DC
consul-server01 192.168.10.60:8301 alive server 0.9.2 2 dc1
[root@consul consul]# consul info | grep leader
leader = true
leader_addr = 192.168.10.60:8300
2.2 通过httpd api可以获取集群信息
curl 127.0.0.1:8500/v1/status/peers ##查看群集server成员
curl 127.0.0.1:8500/v1/status/leaders ##群集中 Raf leader
curl 127.0.0.1:8500/v1/catalog/services ##注册的所有服务
curl 127.0.0.1:8500/v1/catalog/nodes ##群集节点详细信息
curl 127.0.0.1:8500/v1/catalog/nginx ##查看 nginx 服务信息
2.3 配置容器服务自动加入NGINX集群
## 配置192.168.10.50节点
[root@localhost ~]# docker run -d --name=registrator \
> --net=host \
> -v /var/run/docker.sock:/tmp/docker.sock \
> --restart=always \
> gliderlabs/registrator:latest \
> -ip=192.168.10.50 \
> consul://192.168.10.60:8500
2.4 查看效果
浏览器输入192.168.10.60:8500
测试服务是否正常
[root@localhost ~]# docker run -itd -p:83:80 --name test1 -h test01 nginx
Unable to find image 'nginx:latest' locally
latest: Pulling from library/nginx
a076a628af6f: Pull complete
0732ab25fa22: Pull complete
d7f36f6fe38f: Pull complete
f72584a26f32: Pull complete
7125e4df9063: Pull complete
Digest: sha256:10b8cc432d56da8b61b070f4c7d2543a9ed17c2b23010b43af434fd40e2ca4aa
Status: Downloaded newer image for nginx:latest
29ba0c2508e4b74f5fae2c20bae408b4fe45edf6714a9505b37ac100f482d922
[root@localhost ~]# docker run -itd -p:84:80 --name test2 -h test02 nginx
cea37208c398c409863dc16cf2b422f0608ffa347a282768b1ca5f2323edb4e9
刷新网页查看:
2.5 删除一个容器,验证自动删除容器效果
[root@localhost ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8f50391d9e5d httpd "httpd-foreground" 38 seconds ago Up 37 seconds 0.0.0.0:85->80/tcp test4
ae0f0931cf7a httpd "httpd-foreground" 4 minutes ago Created test3
cea37208c398 nginx "/docker-entrypoint.…" 10 minutes ago Up 10 minutes 0.0.0.0:84->80/tcp test2
29ba0c2508e4 nginx "/docker-entrypoint.…" 21 minutes ago Up 21 minutes 0.0.0.0:83->80/tcp test1
40965b98cb10 gliderlabs/registrator:latest "/bin/registrator -i…" 37 minutes ago Up 37 minutes registrator
1fc1f68fa7a8 nginx-php:my "/bin/sh -c '/usr/sb…" 2 days ago Exited (137) 2 days ago nginx-php
53d0d5464590 f51c0a3356eb "/bin/sh -c 'yum ins…" 2 days ago Exited (1) 2 days ago quizzical_kalam
[root@localhost ~]# docker stop ae
ae
[root@localhost ~]# docker rm ae
ae
[root@localhost ~]# docker stop ce
ce
[root@localhost ~]# docker rm ce
ce
刷新网页验证效果
三、consul-template
3.1 consu-template介绍
1、是基于consul的自动替换配置文件的应用
2、可以查询consul中的服务目录:key、key-values等
3、适合动态的创建配置文件
4、是一个守护进程、用于实时查询consul集群信息
3.2 准备template nginx模板文件
## 在consul服务器上创建一个模板文件
[root@consul ~]# vi /root/consul/nginx.ctmpl
upstream http_backend {
{{range service "nginx"}}
server {{.Address}}:{{.Port}};
{{end}}
}
server {
listen 83;
server_name localhost 192.168.10.60;
access_log /var/log/nginx/lqy.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-Fprwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://http_backend;
}
}
3.3 编译安装nginx
[root@consul ~]# yum -y install gcc gcc-c++ make pcre pcre-devel zlib zlib-devel
[root@consul ~]# tar zxf nginx-1.12.2.tar.gz -C /opt/
[root@consul ~]# cd nginx-1.12.2/
[root@consul ~]# ./configure --prefix=/usr/local/nginx
[root@consul ~]# make && make install
##配置nginx
[root@consul ~]# vi /usr/local/nginx/conf/nginx.conf
http {
include mime.types;
include vhost/*.conf; ###添加虚拟主机目录
3.4 创建虚拟主机目录和日志文件目录
[root@consul ~]# mkdir /usr/local/nginx/conf/vhost
[root@consul ~]# mkdir /var/log/nginx
3.5 启动nginx
/usr/local/nginx/sbin/nginx
3.6 配置启动template
[root@consul ~]# yum -y install lrzsz
[root@consul ~]# cd /usr/bin
[root@consul bin~]# rz -E
[root@consul bin~]# unzip consul-template_0.19.3_linux_amd64.zip
## 启动
[root@consul ~]# consul-template -consul-addr 192.168.10.60:8500 -template "/root/consul/nginx.ctmpl:/usr/local/nginx/conf/vhost/lqy.conf:/usr/local/nginx/sbin/nginx -s reload" --log-level=info
##查看lqy。conf配置文件可以看到自动加入的节点
[root@consul ~]# cat /usr/local/nginx/conf/vhost/lqy.conf
upstream http_backend {
server 192.168.10.50:83;
server 192.168.10.50:81;
server 192.168.10.50:84;
}
server {
listen 83;
server_name localhost 192.168.10.60;
access_log /var/log/nginx/lqy.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-Fprwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://http_backend;
}
}
3.6 在服务端新建一个容器节点,查看跟新内容
[root@localhost ~]# docker run -itd -p:89:80 --name test6 -h test06 nginx
0056bdc7baed13787cbac72e272066550dc23f8bfb83f17a741700ea9cb4c454
[root@consul ~]# cat /usr/local/nginx/conf/vhost/lqy.conf
upstream http_backend {
server 192.168.10.50:81;
server 192.168.10.50:84;
server 192.168.10.50:89;
}
server {
listen 83;
server_name localhost 192.168.10.60;
access_log /var/log/nginx/lqy.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-Fprwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://http_backend;
}
}
3.7 删除一个容器查看配置文件变化
[root@localhost ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0056bdc7baed nginx "/docker-entrypoint.…" 4 minutes ago Up 4 minutes 0.0.0.0:89->80/tcp test6
b1c532bd0de9 nginx "/docker-entrypoint.…" 26 minutes ago Up 26 minutes 0.0.0.0:84->80/tcp test5
e150da2a26bb nginx "/docker-entrypoint.…" 26 minutes ago Up 26 minutes 0.0.0.0:81->80/tcp test3
8f50391d9e5d httpd "httpd-foreground" 3 hours ago Up 3 hours 0.0.0.0:85->80/tcp test4
40965b98cb10 gliderlabs/registrator:latest "/bin/registrator -i…" 3 hours ago Up 3 hours registrator
1fc1f68fa7a8 nginx-php:my "/bin/sh -c '/usr/sb…" 2 days ago Exited (137) 2 days ago nginx-php
53d0d5464590 f51c0a3356eb "/bin/sh -c 'yum ins…" 2 days ago Exited (1) 2 days ago quizzical_kalam
[root@localhost ~]# docker stop 00
00
[root@localhost ~]# docker rm 00
00
[root@consul ~]# cat /usr/local/nginx/conf/vhost/lqy.conf
upstream http_backend {
server 192.168.10.50:81;
server 192.168.10.50:84;
}
server {
listen 83;
server_name localhost 192.168.10.60;
access_log /var/log/nginx/lqy.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-Fprwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://http_backend;
}
}
3.8 使用logs命令,查看nginx容器日志,可以发现是处于轮询状态,都是现实来自同一个ip的访问
[root@localhost ~]# docker logs -f test3
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2021/03/14 12:56:17 [error] 29#29: *1 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such file or directory), client: 192.168.10.60, server: localhost, request: "GET /favicon.ico HTTP/1.0", host: "192.168.10.60", referrer: "http://192.168.10.60:83/"
192.168.10.60 - - [14/Mar/2021:12:56:17 +0000] "GET /favicon.ico HTTP/1.0" 404 555 "http://192.168.10.60:83/" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:57:00 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:57:04 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:57:06 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:43 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:43 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:44 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
[root@localhost ~]# docker logs -f test5
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
192.168.10.60 - - [14/Mar/2021:12:56:20 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:57:03 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:57:04 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:41 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:43 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:44 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:44 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:45 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"
192.168.10.60 - - [14/Mar/2021:12:59:46 +0000] "GET / HTTP/1.0" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36" "-"