Docker Test Environment Variable

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root@docker:~# apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
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root@docker:~# echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
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deb https://apt.dockerproject.org/repo ubuntu-xenial main
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root@docker:~# apt-get update
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root@docker:~# apt-cache policy docker-engine
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root@docker:~# apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual

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root@docker:~#  docker run hello-world
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Unable to find image 'hello-world:latest' locally
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latest: Pulling from library/hello-world
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c04b14da8d14: Pull complete
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Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
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Status: Downloaded newer image for hello-world:latest
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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To generate this message, Docker took the following steps:
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 1. The Docker client contacted the Docker daemon.
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 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
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 3. The Docker daemon created a new container from that image which runs the
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    executable that produces the output you are currently reading.
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 4. The Docker daemon streamed that output to the Docker client, which sent it
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    to your terminal.
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To try something more ambitious, you can run an Ubuntu container with:
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 $ docker run -it ubuntu bash
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Share images, automate workflows, and more with a free Docker Hub account:
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 https://hub.docker.com
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For more examples and ideas, visit:
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 https://docs.docker.com/engine/userguide/

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root@docker:~# groupadd docker
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groupadd: group 'docker' already exists
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root@docker:~# usermod -aG docker rrosso
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rrosso@docker:~$ docker run hello-world
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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To generate this message, Docker took the following steps:
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 1. The Docker client contacted the Docker daemon.
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 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
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 3. The Docker daemon created a new container from that image which runs the
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    executable that produces the output you are currently reading.
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 4. The Docker daemon streamed that output to the Docker client, which sent it
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    to your terminal.
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To try something more ambitious, you can run an Ubuntu container with:
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 $ docker run -it ubuntu bash
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Share images, automate workflows, and more with a free Docker Hub account:
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 https://hub.docker.com
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For more examples and ideas, visit:
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 https://docs.docker.com/engine/userguide/

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root@docker:~# systemctl enable docker
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Synchronizing state of docker.service with SysV init with /lib/systemd/systemd-sysv-install...
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Executing /lib/systemd/systemd-sysv-install enable docker

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rrosso@docker:~$ docker run -d -P training/webapp python app.py
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Unable to find image 'training/webapp:latest' locally
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latest: Pulling from training/webapp
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e190868d63f8: Pull complete
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909cd34c6fd7: Pull complete
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0b9bfabab7c1: Pull complete
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a3ed95caeb02: Pull complete
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10bbbc0fc0ff: Pull complete
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fca59b508e9f: Pull complete
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e7ae2541b15b: Pull complete
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9dd97ef58ce9: Pull complete
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a4c1b0cb7af7: Pull complete
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Digest: sha256:06e9c1983bd6d5db5fba376ccd63bfa529e8d02f23d5079b8f74a616308fb11d
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Status: Downloaded newer image for training/webapp:latest
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331df8667f005e40555944b7e61108525e843b6262275808f016695aacd7fc67
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rrosso@docker:~$ docker ps -l
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CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                     NAMES
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331df8667f00        training/webapp     "python app.py"     34 seconds ago      Up 33 seconds       0.0.0.0:32768->5000/tcp   focused_jang
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rrosso@docker:~$ docker inspect focused_jang
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[
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    {
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        "Id": "331df8667f005e40555944b7e61108525e843b6262275808f016695aacd7fc67",
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        "Created": "2016-10-31T21:18:32.596139908Z",
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        "Path": "python",
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        "Args": [
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            "app.py"
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        ],
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        "State": {
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            "Status": "running",
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[.. snip ..]
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                    "Gateway": "172.17.0.1",
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                    "IPAddress": "172.17.0.2",
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                    "IPPrefixLen": 16,
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                    "IPv6Gateway": "",
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                    "GlobalIPv6Address": "",
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                    "GlobalIPv6PrefixLen": 0,
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                    "MacAddress": "02:42:ac:11:00:02"
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                }
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            }
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        }
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    }
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]
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rrosso@docker:~$ docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' focused_jang
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172.17.0.2

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rrosso@docker:~$ docker run -e "PROVIDER=app1" -d -P training/webapp python app.py
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c300d87ef0a9ad3ca5f3c40fd5ae7d54f095ada52d1f092e991a2271652b573b
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rrosso@docker:~$ docker ps -l
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CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                     NAMES
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c300d87ef0a9        training/webapp     "python app.py"     11 seconds ago      Up 10 seconds       0.0.0.0:32770->5000/tcp   sleepy_varahamihira

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rrosso@docker:~$ docker stop sleepy_varahamihira
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sleepy_varahamihira
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rrosso@docker:~$ docker run -t -i training/webapp /bin/bash
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root@3c94c01cc795:/opt/webapp# vi app.py
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root@3c94c01cc795:/opt/webapp# cat app.py
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import os
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from flask import Flask
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app = Flask(__name__)
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@app.route('/')
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def hello():
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    provider = str(os.environ.get('PROVIDER', 'world'))
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    return 'Riaan added '+provider+'!'
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if __name__ == '__main__':
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    # Bind to PORT if defined, otherwise default to 5000.
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    port = int(os.environ.get('PORT', 5000))
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    app.run(host='0.0.0.0', port=port)
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root@3c94c01cc795:/opt/webapp# exit
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rrosso@docker:~$ docker run -e "PROVIDER=app1" -d -P training/webapp python app.py
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8116836ea65f7254e81671a58b68cf263b42427b066a1c3cfc971c70303b614d
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rrosso@docker:~$ docker stop evil_colden
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evil_colden
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rrosso@docker:~$ docker run -e "PROVIDER=app1" -d -P training/webapp python app.py
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190207e1eadad71205256a5127de982ad837dbad5a41896546ba480e2416ba20
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rrosso@docker:~$ docker ps -l
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CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                     NAMES
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190207e1eada        training/webapp     "python app.py"     8 seconds ago       Up 7 seconds        0.0.0.0:32772->5000/tcp   condescending_wilson
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rrosso@docker:~$ docker stop condescending_wilson
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condescending_wilson
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rrosso@docker:~$ docker run -t -i training/webapp /bin/bash
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root@f6dd40e4a838:/opt/webapp# vi app.py
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root@f6dd40e4a838:/opt/webapp# exit
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rrosso@docker:~$ docker ps -l
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CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS                     PORTS               NAMES
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f6dd40e4a838        training/webapp     "/bin/bash"         About a minute ago   Exited (0) 5 seconds ago                       determined_cray
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rrosso@docker:~$ docker commit f6dd40e4a838 training/webapp
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sha256:8392632ac934525ae846d6a2e0284a52de7cbfa1a682bf8a9804966c5c3e15c9
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rrosso@docker:~$ docker run -e "PROVIDER=app1" -d -P training/webapp python app.py
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594d6edb3ab7400ae3c38584c0d48276f24973a4328c3f60c1b1bc4cce16f17a
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rrosso@docker:~$ docker ps -l
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CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                     NAMES
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594d6edb3ab7        training/webapp     "python app.py"     5 seconds ago       Up 4 seconds        0.0.0.0:32773->5000/tcp   focused_hawking

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sudo docker run -d -t -i -e REDIS_NAMESPACE='staging' \
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-e POSTGRES_ENV_POSTGRES_PASSWORD='foo' \
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-e POSTGRES_ENV_POSTGRES_USER='bar' \
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-e POSTGRES_ENV_DB_NAME='mysite_staging' \
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-e POSTGRES_PORT_5432_TCP_ADDR='docker-db-1.hidden.us-east-1.rds.amazonaws.com' \
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-e SITE_URL='staging.mysite.com' \
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-p 80:80 \
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--link redis:redis \
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--name container_name dockerhub_id/image_name