Nginx Server Docker

Example for nginx migration from x86 to ARM

The materials in H-Container Tutorial are needed.

In Dockerfile, the CMD ["./popcorn-nginx","-g","daemon off;"].

Because in Container, nginx is process 1, docker will exit when nginx initilazation is over

In order to keep container running, it needs args '-g daemon off;' to force it hang on.	

cp -r nginx /usr/local 
	
cd nginx_bin

cp popcorn-nginx_x86-64 popcorn-nginx

cp -r ../nginx_bin /app	

docker build -t mynginx_x86 .

docker run --cap-add all -d -v /usr/local/nginx/logs/:/usr/local/nginx/logs/ -v /usr/local/nginx/conf/:/usr/local/nginx/conf/ mynginx_x86

 	4e6f433906d85a874acdc1b3138ffc9389e74e7120e11f5e0aa25dd08d3270f4

Directly run docker image to create a Container of nginx.

--cap-add all : it will add all capabilities, no need for change config file

-v: volumn to mount system file system with docker file system.(**THIS IS RESON WHY NGINX DOCKERFILE NEED UBUNTU IMAGE LOAD**)

/usr/local/nginx/logs: Nginx needs error.log to run   

/user/local/nginx/conf: Nginx needs nginx.conf to run

-d: Run in background, this args cause running image will create Container 

docker ps

ps -A | grep nginx
	
	755 ?        00:00:00 popcorn-nginx
	756 ?        00:00:00 popcorn-nginx

popcorn-notify 755 aarch64

popcorn-notify 756 aarch64

docker checkpoint create 4e6f433906d85a874acdc1b3138ffc9389e74e7120e11f5e0aa25dd08d3270f4 simple

./scripts/recode.sh 4e6f433906d85a874acdc1b3138ffc9389e74e7120e11f5e0aa25dd08d3270f4 simple aarch64

scp -r simple $target@x86_machine:~

ssh $target@ARM_machine

cp -r nginx_bin /app

cd nginx_bin

cp -r nginx /usr/local/

cp popcorn-nginx_aarch64 popcorn-nginx

docker build -t mynginx_arm .

# Likewise the capabilities and volumn mapping and port mapping can be done in hostconfig and config.v2.json file. 
docker run --cap-add all -d -v /usr/local/nginx/logs/:/usr/local/nginx/logs/ -v /usr/local/nginx/conf/:/usr/local/nginx/conf/ mynginx_arm
	
	10877d6d99969b4bdc0a4fc1dc144615cb1e0d1bbbb727324adc7538f473b394

Since we run image to create a container, so this time, we need stop it first.

docker container stop 10877d6d99969b4bdc0a4fc1dc144615cb1e0d1bbbb727324adc7538f473b394

Copy the transferred recoded checkpoint in /tmp to the sub-directory checkpoints inside the Container directory, then restart the Nginx Container on target Machine

cp -r ~/simple /var/lib/docker/containers/10877d6d99969b4bdc0a4fc1dc144615cb1e0d1bbbb727324adc7538f473b394/checkpoints

docker container start --checkpoint simple 10877d6d99969b4bdc0a4fc1dc144615cb1e0d1bbbb727324adc7538f473b394 

docker ps