Nacos 高可用环境搭建（基于Docker）

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Nacos 高可用环境搭建

Nacos 高可用环境 = Nacos 集群 + Nacos 持久化

请添加图片描述

参考：<(￣︶￣)↗Nacos官网 - 集群部署说明

Nacos 高可用环境搭建
- 1、创建 Docker 局域网
- 2、创建并启动1个 Nginx 容器，将容器加入局域网
- 3、创建并启动1个 MySQL 容器，将容器加入局域网
- 4、创建并启动3个 Nacos 容器，将容器加入局域网
- 5、验证上述容器能否相互 ping 通
- 6、配置 Nacos 持久化、集群
- 7、验证 Nacos 持久化是否生效
- 8、配置 Nginx 对 Nacos 的负载均衡
- 9、验证 Nginx 负载均衡是否生效

1、创建 Docker 局域网

创建 Docker 局域网

PS C:\Users\xiao> docker network create MyNetwork
56b64b706d69bf2d3b30eb6d63c94bb110c74e16febf96c1b1b0aa687cc3d493

罗列所有局域网

PS C:\Users\xiao> docker network ls
NETWORK ID     NAME        DRIVER    SCOPE
56b64b706d69   MyNetwork   bridge    local
e19f31ab243a   bridge      bridge    local
09b9f7e52530   host        host      local
3bb55566e6c5   none        null      local

查看局域网详情

PS C:\Users\xiao> docker network inspect MyNetwork
[
    {
        "Name": "MyNetwork",
        "Id": "56b64b706d69bf2d3b30eb6d63c94bb110c74e16febf96c1b1b0aa687cc3d493",
        "Created": "2022-01-27T11:58:16.195894307Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

2、创建并启动1个 Nginx 容器，将容器加入局域网

创建并启动 Nginx 容器

<(￣︶￣)↗Nginx 实战 - 安装.md

将 Nginx 容器加入局域网

PS C:\Users\xiao> docker network connect MyNetwork MyNginx

检查 Nginx 容器是否成功加入局域网

PS C:\Users\xiao> docker network inspect MyNetwork
[
    {
        "Name": "MyNetwork",
        "Id": "56b64b706d69bf2d3b30eb6d63c94bb110c74e16febf96c1b1b0aa687cc3d493",
        "Created": "2022-01-27T11:58:16.195894307Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "9ba1cfa5e902ba3f4cfebb6404d03f8c4cbe1aa418fc4ae682722c5882c88811": {
                "Name": "MyNginx",
                "EndpointID": "22e350022928c6e597a0bc217b84270525ab8400bb84d04387d63632f0b028eb",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

3、创建并启动1个 MySQL 容器，将容器加入局域网

创建并启动 MySQL 容器

<(￣︶￣)↗MySQL 实战 - 安装.md

将 MySQL 容器加入局域网

PS C:\Users\xiao> docker network connect MyNetwork MyMySQL

检查 MySQL 容器是否成功加入局域网

PS C:\Users\xiao> docker network inspect MyNetwork
[
    {
        "Name": "MyNetwork",
        "Id": "56b64b706d69bf2d3b30eb6d63c94bb110c74e16febf96c1b1b0aa687cc3d493",
        "Created": "2022-01-27T11:58:16.195894307Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "9ba1cfa5e902ba3f4cfebb6404d03f8c4cbe1aa418fc4ae682722c5882c88811": {
                "Name": "MyNginx",
                "EndpointID": "22e350022928c6e597a0bc217b84270525ab8400bb84d04387d63632f0b028eb",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "45a4bca256c29842067cb324c67f3288c24b545a61cb796f4df1bfc5b1fcaae6": {
                "Name": "MyMySQL",
                "EndpointID": "f80a9fbd1f849a58f18b45d4d7684295e6d8e593c0b308af7215846692e2e57d",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

4、创建并启动3个 Nacos 容器，将容器加入局域网

创建并启动 Nacos 容器（集群模式）

<(￣︶￣)↗Nacos 实战 - 安装与使用.md

docker run -itd -p 8848:8848 --env MODE=cluster --name MyNacos1 nacos/nacos-server
docker run -itd -p 8849:8848 --env MODE=cluster --name MyNacos2 nacos/nacos-server
docker run -itd -p 8850:8848 --env MODE=cluster --name MyNacos3 nacos/nacos-server

将 Nacos 容器加入局域网

docker network connect MyNetwork MyNacos1
docker network connect MyNetwork MyNacos2
docker network connect MyNetwork MyNacos3

检查 Nacos 容器是否成功加入局域网

PS C:\Users\xiao> docker network inspect MyNetwork
[
    {
        "Name": "MyNetwork",
        "Id": "56b64b706d69bf2d3b30eb6d63c94bb110c74e16febf96c1b1b0aa687cc3d493",
        "Created": "2022-01-27T11:58:16.195894307Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "9ba1cfa5e902ba3f4cfebb6404d03f8c4cbe1aa418fc4ae682722c5882c88811": {
                "Name": "MyNginx",
                "EndpointID": "22e350022928c6e597a0bc217b84270525ab8400bb84d04387d63632f0b028eb",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "45a4bca256c29842067cb324c67f3288c24b545a61cb796f4df1bfc5b1fcaae6": {
                "Name": "MyMySQL",
                "EndpointID": "f80a9fbd1f849a58f18b45d4d7684295e6d8e593c0b308af7215846692e2e57d",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "IPv6Address": ""
            },
            "b2268309c7e072f7212fc10efc773636676243d40067e8f4511324786701aed7": {
                "Name": "MyNacos1",
                "EndpointID": "2d0c0db59c5918bac6955bdc24682576d0b8301ea67097110d5a4f6a8557966e",
                "MacAddress": "02:42:ac:12:00:04",
                "IPv4Address": "172.18.0.4/16",
                "IPv6Address": ""
            },
            "a07e465b71cd19c54caa26aeb58aad9714d03945d029648ec65e61affc3b1796": {
                "Name": "MyNacos2",
                "EndpointID": "0a5a371b04e2eb4087836a817785edaf86a356b1ad100f164328d6481a17b190",
                "MacAddress": "02:42:ac:12:00:05",
                "IPv4Address": "172.18.0.5/16",
                "IPv6Address": ""
            },
            "d29eceb1c4b5d6071a8e11d75dce038f27eae5e8800cafc7cbeb97429c3d5d95": {
                "Name": "MyNacos3",
                "EndpointID": "79cb067cd0d3c267fc51614fc794c31d8922e334132a3ae3efaabf4dd3bb7e60",
                "MacAddress": "02:42:ac:12:00:06",
                "IPv4Address": "172.18.0.6/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

5、验证上述容器能否相互 ping 通

注意：ping: command not found
解决：apt-get update + apt-get iputils-ping

请添加图片描述

6、配置 Nacos 持久化、集群

<(￣︶￣)↗Nacos实战 - 持久化.md

从 Nacos 官网获取 Nacos 数据库构建脚本，MySQL 执行脚本搭建 Nacos 数据库
进入 Nacos 实例，修改 /conf/application.properties 文件，配置 Nacos 持久化
修改 /conf/cluster.conf 配置文件，配置 Nacos 集群

7、验证 Nacos 持久化是否生效

重启所有 Nacos 实例
打开任意一个 Nacos 实例的控制面板，创建若干配置信息
检查配置信息是否存入数据库
打开其他 Nacos 实例的控制面板，检查是否获取到相同的配置信息

8、配置 Nginx 对 Nacos 的负载均衡

<(￣︶￣)↗Nginx 实战 - 负载均衡.md

进入 Nginx 容器，配置自定义配置文件 /etc/nginx/conf.d/nacosLoadBalance.conf

upstream serverInstance {
    # ip_hash;
    server 172.18.0.4:8848  weight=1;
    server 172.18.0.5:8848  weight=1;
    server 172.18.0.6:8848  weight=1;
}

server {
    listen       80;
    server_name  127.0.0.1;
    
    location ~ /nacos/ {
        proxy_pass http://serverInstance;
        proxy_connect_timeout 10;
    }
}

9、验证 Nginx 负载均衡是否生效

修改 Nginx 配置文件，改变日志格式

log_format  main  '$remote_addr --"$request"--> $http_host--> $upstream_addr [$status  $request_time]';

重启 Nginx
通过 Nginx 访问 Nacos 控制面板

刷新若干次后查看日志文件

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.4:8848 [200  0.012]

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.5:8848 [304  0.010]

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.6:8848 [304  0.009]

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.4:8848 [200  0.010]

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.5:8848 [200  0.010]

172.18.0.1 --"GET /nacos/ HTTP/1.1"--> 127.0.0.1--> 172.18.0.6:8848 [304  0.010]

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