docekr nginx vhost

try dev branch ~

docker Load Balancing

https://www.nginx.com/resources/glossary/load-balancing/

step 1

docker rm * rmi

$ sudo docker images
REPOSITORY   TAG       IMAGE ID   CREATED   SIZE
$ sudo docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

step2

$ docker run -itd -p 8002:80 --name serv-a nginx
$ docker run -itd -p 8003:80 --name serv-b nginx
$ docker run -itd -p 8001:80 --name lb nginx:latest

$ sudo docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                                   NAMES
2fe6b3ebdb6e   nginx          "/docker-entrypoint.…"   5 seconds ago    Up 4 seconds    0.0.0.0:8002->80/tcp, :::8002->80/tcp   serv-a
fafba17b8cf6   nginx          "/docker-entrypoint.…"   18 seconds ago   Up 17 seconds   0.0.0.0:8003->80/tcp, :::8003->80/tcp   serv-b
fd3ca54a154a   nginx:latest   "/docker-entrypoint.…"   3 minutes ago    Up 3 minutes    0.0.0.0:8001->80/tcp, :::8001->80/tcp   lb

step 3

/home/rahee/code/docker-nginx-vhost 위치에 config 폴더 생성 후 default.conf 파일 생성

upstream serv {
        server serv-a:80;
        server serv-b:80;
}
server {
        listen 80;

        location /
        {
                proxy_pass http://serv;
        }
}

step 4

lb 폴더에도 default.conf 복사하기

$sudo docker cp config/default.conf lb:/etc/nginx/conf.d

step 5

mv config lb 로 옮기기


.
├── README.md
├── lb
│   └── config
│       └── default.conf
├── serv-a
│   └── index.html
└── serv-b
└── index.html

### step 6

$ vi serv-a/index.html

A

$ cp serv-a/index.html serv-b $ vi serv-b/index.html

B

각각 파일 만들어서 컨테이너 /usr/share/nginx/html/ 밑에 각각 cp하기 $ sudo docker cp serv-a/index.html serv-a:/usr/share/nginx/html/ $ sudo docker cp serv-b/index.html serv-b:/usr/share/nginx/html/

$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 00973b69b91e nginx "/docker-entrypoint.…" 52 minutes ago Up 52 minutes 0.0.0.0:8003->80/tcp, :::8003->80/tcp serv-b 2282216488a5 nginx "/docker-entrypoint.…" 54 minutes ago Up 54 minutes 0.0.0.0:8002->80/tcp, :::8002->80/tcp serv-a

- lb 에 각각 담겨 있기 때문에 a,b 번갈아가면서 화면 노출됨
- lb가 대리자 프록시 역할

### step 7
- https://github.com/raheego/docker-nginx-vhost/issues/2
- bridge 네트워크는 하나의 호스트 컴퓨터 내에서 여러 컨테이너 연결
- host 네트워크는 컨터이너를 호스트 컴퓨터와 동일한 네트워크에서 컨테이너를 돌리기 위해서 사용
- overlay 네트워크는 여러 호스트에 분산되어 돌아가는 컨테이너들 간에 네트워킹을 위해서 사용

$ docker network ls

$ sudo docker network ls $ sudo docker network create abc

$ sudo docker network inspect abc [ { "Name": "abc", "Id": "890893d530e45b36c7c7c01e465773935b1bf5e2fd79e3a63b683c966f8a5609", "Created": "2024-02-14T12:48:07.928438906+09:00", "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": {} } ]

$ sudo docker network inspect host [ { "Name": "host", "Id": "a1f6e3af6ac79d9cf675f18ec804e1932d6de94a89edd033489d3900a9c88f10", "Created": "2024-01-29T14:27:58.523572411+09:00", "Scope": "local", "Driver": "host", "EnableIPv6": false, "IPAM": { "Driver": "default", "Options": null, "Config": null }, "Internal": false, "Attachable": false, "Ingress": false, "ConfigFrom": { "Network": "" }, "ConfigOnly": false, "Containers": {}, "Options": {}, "Labels": {} } ]

connect $ sudo docker network connect abc serv-a $ sudo docker network connect abc serv-b $ sudo docker network connect abc lb

$ sudo docker network inspect abc

[ { "Name": "abc", "Id": "890893d530e45b36c7c7c01e465773935b1bf5e2fd79e3a63b683c966f8a5609", "Created": "2024-02-14T12:48:07.928438906+09:00", "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": { "00973b69b91e1bf2dadd610db75f366344e4476e87b906d8256e0c0b5afb37bc": { "Name": "serv-b", "EndpointID": "8fa424cceec9fb39b988c06a1fd2a9235b5a756a326125a78b110524b87a2de7", "MacAddress": "02:42:ac:12:00:03", "IPv4Address": "172.18.0.3/16", "IPv6Address": "" }, "03ea8ce41073136024943447964f41c03a2196bdff99142329e05f327bdd2239": { "Name": "lb", "EndpointID": "46a2860c4d1fc104a65a6cd9705c4a0c7da322091848ec8fe9a7cfc36dfe78b7", "MacAddress": "02:42:ac:12:00:04", "IPv4Address": "172.18.0.4/16", "IPv6Address": "" }, "2282216488a515eaefd3f4867df46b9fab7b4929d22f85b20fd76958c6176f77": { "Name": "serv-a", "EndpointID": "e487e42e02ae059bc69cb80ef68beaf808f8e87d608594c9ff2373b582ca1eda", "MacAddress": "02:42:ac:12:00:02", "IPv4Address": "172.18.0.2/16", "IPv6Address": "" } }, "Options": {}, "Labels": {} } ]


## Try
- serv-a 와 serv-b의 포트번호인 8002,8003 을 없애고, 8001 포트인 lb만을 통해서 접속하는 실습
- pull 하지 않고 commit만 해도 됨

1. serv-a, serv-b commit 해서 image로 만들기
2. serv-a, serv-b 삭제하기
3. serv-a serv-b run 하기 (-p옵션 X)
4. serv-a serv-b 다시 abc로 connect해주기

$ sudo docker commit serv-a rahee/serv-a $ sudo docker commit serv-b rahee/serv-b

$ docker rm serv-a $ docker rm serv-b

$ sudo docker run --name serv-a -d rahee/serv-a // -p옵션 없이 run 하기 $ sudo docker run --name serv-b -d rahee/serv-b // -p옵션 없이 run 하기

$ sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 11b057d6e7ec rahee/serv-b "/docker-entrypoint.…" 3 minutes ago Up 3 minutes 80/tcp serv-b a18cd1a18fff rahee/serv-a "/docker-entrypoint.…" 3 minutes ago Up 3 minutes 80/tcp serv-a 03ea8ce41073 nginx:latest "/docker-entrypoint.…" 4 hours ago Up About an hour 0.0.0.0:8001->80/tcp, :::8001->80/tcp lb

$ sudo docker network connect abc serv-a $ sudo docker network connect abc serv-b

$ sudo docker network inspect abc // 컨테이너 확인


### Try 2(Dockerfile 생성 후 build, run)

도커 파일 생성 $ vi lb/Dockerfile From nginx COPY config/default.conf /etc/nginx/conf.d/

$ vi serv-a/Dockerfile FROM nginx COPY index.html /usr/share/nginx/html

$ vi serv-b/Dockerfile FROM nginx COPY index.html /usr/share/nginx/html

build $ sudo docker build -t serv-b:\n0.1.0 . $ sudo docker build -t serv-b:0.1.0 . $ sudo docker build -t lb:0.1.0 .

run $ sudo docker run -d --name lb -p 8001:80 lb:0.1.0 $ sudo docker run -d --name serv-a serv-a:0.1.0 $ sudo docker run -d --name serv-b serv-b:0.1.0

network $ docker network create dockerfileNW $ sudo docker network connect dockerfileNW serv-a $ sudo docker network connect dockerfileNW serv-b $ sudo docker network connect dockerfileNW lb



## ref
- https://hub.docker.com/_/nginx
- https://github.com/pySatellite/docker-nginx-vhost

raheego / docker-nginx-vhost

readme