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为什么要用英文写呢？为了去外企，为了摆脱自己对英语的恐惧，不是装B。
1-1: Nacos Cluster Architecture Nacos集群架构
The picutre comes from Nacos. It shows the main nacos cluster arch. As I understand it, there maybe an Nginx server exist in front of docker nacos cluster. So, I try to deploy an nacos cluster by using docker-compose technology and an Nginx server. This article aims to record the process of deploying and the peoblems during completing it.
Docker-compose v2.2.2 : Different docker-compose version don’t seem to be a problem.Nacos: v2.0.3 the latestMySQL: v5.7Nginx: v1.18.0 1-3: Project Arch and Nacos Deploment in Docker
nacos-hostname.env
#nacos dev env PREFER_HOST_MODE=hostname # docker实例别名，可以换成ip port must be 8848 NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848 MYSQL_SERVICE_HOST=mysql # 指定保存数据的数据库名称 MYSQL_SERVICE_DB_NAME=nacos_devtest # 访问mysql端口 MYSQL_SERVICE_PORT=3306 # 访问mysql的用户名 MYSQL_SERVICE_USER=root # 访问mysql的密码 MYSQL_SERVICE_PASSWORD=rootcustom.properties
#spring.security.enabled=false #management.security=false #security.basic.enabled=false #nacos.security.ignore.urls=/** #management.metrics.export.elastic.host=http://localhost:9200 # metrics for prometheus management.endpoints.web.exposure.include=* # metrics for elastic search #management.metrics.export.elastic.enabled=false #management.metrics.export.elastic.host=http://localhost:9200 # metrics for influx #management.metrics.export.influx.enabled=false #management.metrics.export.influx.db=springboot #management.metrics.export.influx.uri=http://localhost:8086 #management.metrics.export.influx.auto-create-db=true #management.metrics.export.influx.consistency=one #management.metrics.export.influx.compressed=truedocker-compose.yml
version: "3"
services:
mysql:
container_name: mysql
# 最新的mysql8版本
image: mysql:5.7
environment:
# mysql root用户密码
MYSQL_ROOT_PASSWORD: root
command:
--default-authentication-plugin=mysql_native_password
--character-set-server=utf8mb4
--collation-server=utf8mb4_general_ci
--explicit_defaults_for_timestamp=true
--lower_case_table_names=1
--max_allowed_packet=128M;
volumes:
# mysql的数据文件
- ./mysql/data:/var/lib/mysql
# mysql配置文件
- ./mysql/config:/etc/mysql/conf.d
ports:
- "3306:3306"
nacos1:
hostname: nacos1
container_name: nacos1
image: nacos/nacos-server:latest
volumes:
# 需要添加mysql8的插件
#- ./nacos/plugins/mysql/:/home/nacos/plugins/mysql/
# 把日志文件映射出来
- ./nacos/cluster-logs/nacos1:/home/nacos/logs
# 把配置文件映射出来
- ./nacos/init.d/custom.properties:/home/nacos/init.d/custom.properties
environment: # 设置环境变量,相当于docker run命令中的-e
- JVM_XMS=512m
- JVM_XMX=512m
- JVM_XMN=128m
#- MODE=standalone
ports:
- "8848:8848"
- "9555:9555"
env_file:
# 集群配置文件
- ./nacos/env/nacos-hostname.env
restart: always
depends_on:
- mysql
nacos2:
hostname: nacos2
image: nacos/nacos-server:latest
container_name: nacos2
volumes:
#- ./nacos/plugins/mysql/:/home/nacos/plugins/mysql/
- ./nacos/cluster-logs/nacos2:/home/nacos/logs
- ./nacos/init.d/custom.properties:/home/nacos/init.d/custom.properties
environment: # 设置环境变量,相当于docker run命令中的-e
- JVM_XMS=512m
- JVM_XMX=512m
- JVM_XMN=128m
ports:
- "8849:8848"
env_file:
- ./nacos/env/nacos-hostname.env
restart: always
depends_on:
- mysql
nacos3:
hostname: nacos3
image: nacos/nacos-server:latest
container_name: nacos3
volumes:
#- ./nacos/plugins/mysql/:/home/nacos/plugins/mysql/
- ./nacos/cluster-logs/nacos3:/home/nacos/logs
- ./nacos/init.d/custom.properties:/home/nacos/init.d/custom.properties
environment: # 设置环境变量,相当于docker run命令中的-e
- JVM_XMS=512m
- JVM_XMX=512m
- JVM_XMN=128m
ports:
- "8850:8848"
env_file:
- ./nacos/env/nacos-hostname.env
restart: always
depends_on:
- mysql
Remember!!! The sql file should be imported into db nacos_devtest. sql file downloadThe files above refer to get source code from gitee and offical nacos group.
Success: All nodes status are up.
Create a dataId in one node and you will get the same in another.
Notes:
In most cases, we may add port mappings in docker services. e.x. - port "8849:8848" i.e. Expose the 8848 port inside the container to the outside 8849 port. However, we may omits one problem. Let me show you. Firstly, when the docker-compose.yml is finished and deployed by docker-compose up command. Docker engine will create an network called ${dir}_defalut like this:
(base) ➜ docker-compose-nacos-mysql-master docker network list NETWORK ID NAME DRIVER SCOPE 72eddc5e38ac bridge bridge local 7348f4641015 docker-nacos_default bridge local <-----
We can inspect this network:
"Containers": {
"185a008b417d09201c8e8efdc5b4b68776f994d797c32d9fbd523327c80cff80": {
"Name": "nacos2",
"EndpointID": "be3a4eba47b6d5908682ece4a9465390385ec5a10ab8b5730d7eb8c2d436c309",
"MacAddress": "02:42:ac:1b:00:05",
"IPv4Address": "172.27.0.5/16",
"IPv6Address": ""
},
"1f09159bc54c43a4fb86eb84e083ab35354e727d1c1bd0a4cab448298e4c2b71": {
"Name": "nacos1",
"EndpointID": "a61935035f6940ad624ac68cd49af76faa1461146130bf1c4349157eed53232f",
"MacAddress": "02:42:ac:1b:00:06",
"IPv4Address": "172.27.0.6/16",
"IPv6Address": ""
},
"b11c0f47fafb15b7523be1c63d5d8f9134c2705dad128ba46630bbff48fe40d8": {
"Name": "nacos3",
"EndpointID": "59d1641bff3f8250bb0c3e13e78c5e44e3c3caeaf8ed48ca7d72b6df6fd32f5b",
"MacAddress": "02:42:ac:1b:00:03",
"IPv4Address": "172.27.0.3/16",
"IPv6Address": ""
},
"e0d5e0d03a07dfea11cd061097a3e1ef2fee6f851c282bff8b8a89d228a5194e": {
"Name": "mysql",
"EndpointID": "f20dd0ed478656e497c502d74541e2c57d30f27b45b0360f25ca766f89edd2e4",
"MacAddress": "02:42:ac:1b:00:02",
"IPv4Address": "172.27.0.2/16",
"IPv6Address": ""
}
}
This shows us the ip of containers(mysql, nacos1, nacos2, nacos3) in docker.
Ok, if I deploy MySQL - port "3307:3306", my host reaches MySQL at 127.0.0.1:3307. Thinking of it, how does nacos1 in the docker container reach MySQL which is in another container? 3307 or 3306? YES ! 3306 is right ! So, let’s check the nacos-hostname.env confiuration file. NACOS_SERVERS=nacos1:8848 nacos2:8848 nacos3:8848 We use the hostname nacos1 instead of the real ip. The ports are also 8848 rather than 8849,8850… so it is MYSQL_SERVICE_PORT=3306.
How to know whether the services could communicate with each other? you can use ping utils in one contaniner. Like this:ping ${antoher container ip adress}, the ip address must be in docker network, such as docker-nacos_default above.
If there has been a MySQL service in your docker container, you must put them(nacos1…3, MySQL) in the same network in order to communicate with each other.
1-4: Nginx Reverse ProxyAs mentioned above, the Nacos cluster won’t be exposed to the outer environment. Each request reaches Nginx first, then Nginx dispatches requests to the Nacos cluster. In this article, I deploy nginx on my host, not docker. Yes, I failed to deploy it on the docker. The main reason is the network in docker. I put nginx on the same docker network docker-nacos_default. Many times I have tried I failed. QAQ. Fortunately, I realized my idea on my host machine-Ubuntu.You can install it by apt-get install nginx . Here is my config.
(base) ➜ docker-compose-nacos-mysql-master cd /etc/nginx
(base) ➜ nginx ls
conf.d koi-utf modules-available proxy_params sites-enabled win-utf
fastcgi.conf koi-win modules-enabled scgi_params snippets
fastcgi_params mime.types nginx.conf sites-available uwsgi_params
(base) ➜ nginx cat nginx.conf
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 768;
# multi_accept on;
}
http {
##
# Basic Settings
##
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
##
# Gzip Settings
##
gzip on;
# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
upstream nacos {
server 192.168.1.4:8848 weight=10;
server 192.168.1.4:8849 weight=10;
server 192.168.1.4:8850 weight=10;
}
server{
listen 80;
server_name 192.168.1.4;
location / {
proxy_pass http://nacos;
}
}
##
# Virtual Host Configs
##
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
In my host, access nacos must from 192.168.1.4:8848; 192.168.1.4:8849; 192.168.1.4:8850; 192.168.1.4 is my ip. Nacos expose their internal port 8848 by 8848, 8849 and 8850 to the outside world. Like the picture below:
Success: Chrome access
http://192.168.1.4/nacos/#/configurationManagement?dataId=&group=&appName=&namespace=&pageSize=&pageNo=
We can arrive nacos terminal.
Install NginxChange Apt Source in Docker ContainerMySQL master-servant + Nacos cluster + Nginx master-servantGitee Deployment Written by a CoderCommunication Between ContainersOfficial Naco Group. There are examples of docker deployment in it.Docker Cluster Deployment If You Has A MySQL Container Aleardy. i.e Different Docer Network Deploymentnacos-mysql.sqlNacos Cluster Deployment document
