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# Build Docker image
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* [Reference](https://nodejs.org/en/docs/guides/nodejs-docker-webapp/)
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* Useful Command
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```bash
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// run with interactive shell
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$ docker run -it <image> /bin/bash
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// list running process
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$ docker ps
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// list images
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$ docker images
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//
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$ docker exec -it <container id> /bin/bash
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// print app output
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$ docker logs <container id>
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// build docker image. image name cannot use camel case
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$ docker build -t <target-image-name> .
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// store image in tart file
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$ docker save <generated-image-name> -o ./store/<generated-image-name>.tar
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// upload tar image to server
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$ rsync -rzvP ./store/<generated-image-name>.tar ubuntu@<serverip>:~/apps/<image-name>/
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$ ssh ubuntu@<serverip>
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$ cd ~/apps/<image-name>
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$ docker-compose stop
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$ docker load -i <image-name>.tar
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$ docker-compose up -d --build
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```
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* testing http
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```bash
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$ curl -i localhost:5000
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HTTP/1.1 200 OK
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X-Powered-By: Express
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Content-Type: text/html; charset=utf-8
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Content-Length: 12
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ETag: W/"c-M6tWOb/Y57lesdjQuHeB1P/qTV0"
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Date: Mon, 13 Nov 2017 20:53:59 GMT
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Connection: keep-alive
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Hello world
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```
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* sample deploy script
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```bash
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# docker way
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docker build -t razer-pay-direct-fast-middleware:latest .
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docker save razer-pay-direct-fast-middleware:latest -o ./docker-local/razer-pay-direct-fast-middleware.tar
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# upload docker image and compose file to the server
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rsync -rzvP ./docker-local/razer-pay-direct-fast-middleware.tar docker-compose.yml ubuntu@172.88.1.101:~/apps/razer-pay-direct-fast-middleware/
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ssh ubuntu@172.88.1.101 << EOF
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cd ~/apps/razer-pay-direct-fast-middleware
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pwd
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echo "Stopping Container..."
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docker-compose stop
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echo "Loading new Docker image..."
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docker load -i razer-pay-direct-fast-middleware.tar
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echo "Restarting Container..."
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docker-compose up -d --build
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echo "Container restarted."
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EOF
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echo "Deployed successfully."
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```
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* user permission
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```shell
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// create docker group
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$ sudo groupadd docker
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// add current user to group
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$ sudo usermod -aG docker ${USER}
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// reboot system for group privillege to take effect
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// test run
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$ docker run hello-world
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```
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