1 //查看conusl信息
 2 [root@master ~]# consul  info
 3 agent:
 4     check_monitors = 0
 5     check_ttls = 0
 6     checks = 0
 7     services = 0
 8 build:
 9     prerelease = 
10     revision = 40cec984
11     version = 1.5.1
12 consul:
13     acl = disabled
14     bootstrap = true
15     known_datacenters = 1
16     leader = true
17     leader_addr = 192.168.1.1:8300  #consul节点IP：端口
18     server = true
19 raft:
20     applied_index = 60
21     commit_index = 60
22     fsm_pending = 0
23     last_contact = 0
24     last_log_index = 60
25     last_log_term = 2
26     last_snapshot_index = 0
27     last_snapshot_term = 0
28     latest_configuration = [{Suffrage:Voter ID:e2448f78-f220-e848-4316-128872e93ea1 Address:192.168.1.1:8300}]
29     latest_configuration_index = 1
30     num_peers = 0
31     protocol_version = 3
32     protocol_version_max = 3
33     protocol_version_min = 0
34     snapshot_version_max = 1
35     snapshot_version_min = 0
36     state = Leader
37     term = 2
38 runtime:
39     arch = amd64
40     cpu_count = 4
41     goroutines = 81
42     max_procs = 4
43     os = linux
44     version = go1.12.1
45 serf_lan:
46     coordinate_resets = 0
47     encrypted = false
48     event_queue = 1
49     event_time = 2
50     failed = 0
51     health_score = 0
52     intent_queue = 0
53     left = 0
54     member_time = 1
55     members = 1
56     query_queue = 0
57     query_time = 1
58 serf_wan:
59     coordinate_resets = 0
60     encrypted = false
61     event_queue = 0
62     event_time = 1
63     failed = 0
64     health_score = 0
65     intent_queue = 0
66     left = 0
67     member_time = 1
68     members = 1
69     query_queue = 0
70     query_time = 1

1 [root@master ~]#  consul  members
2 Node    Address           Status  Type    Build  Protocol  DC   Segment
3 master  192.168.1.1:8301  alive   server  1.5.1  2         dc1  <all>

//依赖环境
# yum -y install gcc openssl openssl-devel zlib zlib-devel pcre pcre-devel 
# useradd -M -s /sbin/nologin nginx
# tar -zxf nginx-1.14.0.tar.gz
# ./configure --user=nginx --group=nginx \--with-http_stub_status_module --with-http_realip_module --with-pcre --with-http_ssl_module
# make && make install
# ln -s /usr/local/nginx/sbin/* /usr/local/bin/
# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
# nginx 
------------------------------------------------------------------------
#PS:  这里nginx作为反向代理，代理后端docker02、docker03上nginx的 容器服务，所以我们先去docker02、docker03上部署一些服务，为了方便等会看到负载的效果，所以，我们运行完成容器之后，做一个主界面内容的区分。

 1 #创建nginx容器-p 随意映射容器内的80端口到宿主机
 2 [root@node1 ~]# docker run -itd --name web1 -p 80 nginx:latest 
 3 77d39af9c5c8bcaa1839b9002bd09ac093f1e0699cef5bd04515ae38b1ceace8
 4 [root@node1 ~]# docker run -itd --name web2 -p 80 nginx:latest 
 5 98ad0a4a5244cbb812ee1c5d2cee4818edc360d6eaea25c70c88f07e88d04a68
 6 #修改容器的nginx首页
 7 [root@node1 ~]# docker exec  -it web1 sh
 8 # echo web1 > /usr/share/nginx/html/index.html
 9 # curl 127.0.0.1
10 web1
11 [root@node1 ~]# docker exec  -it web2 sh
12 # echo web2 > /usr/share/nginx/html/index.html
13 # curl 127.0.0.1
14 web2

 1 #创建容器
 2 [root@node2 ~]# docker run -itd --name web3 -p 80 nginx:latest 
 3 29e0495b3a9c1db99f33374115d626fa37217ab67313e1e20845ccf2dd7ccb82
 4 [root@node2 ~]# docker run -itd --name web4 -p 80 nginx:latest 
 5 2b2fcd9bd3742b9f806d1804a59a61c1f320bd616e66d5d216d6b2c85231fc20
 6 #修改首页
 7 [root@node2 ~]# docker exec  -it web3  sh
 8 # echo web3 > /usr/share/nginx/html/index.html
 9 # curl 127.0.0.1
10 web3
11 # 
12 [root@node2 ~]# docker exec  -it web4  sh
13 # echo web4 > /usr/share/nginx/html/index.html
14 # curl 127.0.0.1
15 web4

vim /usr/local/nginx/consul/nginx.ctmpl
upstream http_backend {
        {{range service "nginx"}}
        server {{ .Address }}:{{ .Port }};
        {{ end }}
}
server {
        listen 8000;
        server_name localhost;
        location / {
        proxy_pass http://http_backend;
        }
}

1 [root@master ~]# vim /usr/local/nginx/conf/nginx.conf
2 116     include /usr/local/nginx/consul/*.conf;
3 [root@master ~]# nginx  -t
4 nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
5 nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

[root@master soft]# unzip consul-template_0.19.5_linux_amd64.zip 
Archive:  consul-template_0.19.5_linux_amd64.zip
  inflating: consul-template         
[root@master soft]# mv consul-template /usr/local/bin/
[root@master soft]# chmod  +x /usr/local/bin/consul-template 
[root@master soft]# nohup consul-template -consul-addr 192.168.1.1:8500 -template "/usr/local/nginx/consul/nginx.ctmpl:/usr/local/nginx/consul/vhost.conf:/usr/local/bin/nginx -s reload" &
[2] 5729
[root@master soft]# nohup: 忽略输入并把输出追加到"nohup.out"
[root@master soft]# cat /usr/local/nginx/consul/vhost.conf 
upstream http_backend {
        
        server 192.168.1.2:32768;
        
        server 192.168.1.2:32769;
        
        server 192.168.1.4:32768;
        
        server 192.168.1.4:32769;
        
}
server {
        listen 8000;
        server_name localhost;
        location / {
        proxy_pass http://http_backend;
        }
}

#访问，实现了负载均衡
[root@master soft]# curl  localhost:8000
web1
[root@master soft]# curl  localhost:8000
web2
[root@master soft]# curl  localhost:8000
web3
[root@master soft]# curl  localhost:8000
web4
[root@master soft]# curl  localhost:8000
web1
[root@master soft]# curl  localhost:8000
web2
[root@master soft]# curl  localhost:8000
web3
[root@master soft]# curl  localhost:8000
web4
#停止node1主机的容器，查看实时发现效果
[root@node1 sfot]# docker stop web1 
^[[Aweb1
[root@node1 sfot]# docker stop web2
web2
#在master访问
[root@master soft]# curl  localhost:8000
web3
[root@master soft]# curl  localhost:8000
web4
[root@master soft]# curl  localhost:8000
web3
[root@master soft]# curl  localhost:8000
web4