Deploying Application

Create your Virtual Machine

  • login into https://horizon.neo.id/. Ask the credential to your team.

  • create new vm:

    • go to "compute → instances", select "launch instance"
    • fill appropriate "instance name" and other fields.
    • choose CentOS in "source" for the sake of similarity.
    • choose your flavour size
    • ask your team what "network" to use.
    • ask your team what "security group" to use.
    • ask your team what "keypair" to use.
    • Ignore "network prort", "configuration", "server group", "scheduler", and "metadata" for now.
    • select "launch instance"

Get your private key

  • get the "private-key" by visiting "orchestration → stack → your-vm-key → overview"
  • copy that "private-key" to write that to a file with appropriate name in your local machine. e.g key.pem
  • run chmod 600 key.pem

Accessing your VM

Do it with ssh:

  • ssh -i /path/to/your/vm-key.pem <your-vm-username>@<public-ip>

then do your business there. Commonly installing docker and docker-compose

sudo yum install docker # installing docker

# installing docker-compose (yes, it's not in centos repo)
sudo yum install epel-release
sudo yum install -y python-pip
sudo pip install docker-compose

Taking your image to your vm

Note

It's advicable to avoid using Docker Hub for our development image. It's also not suitable way of doing managing internal projects.

Use scp for the win!

Sadly, scp will not work seamlessly in centos. You need to change:

'PasswordAuthentication no'
# to
'PasswordAuthentication yes'

in "/etc/ssh/sshd_config", then re-started the service sudo systemctl restart sshd

Prepare your image to be transferred using SCP

  • save docker as tar

    docker save -o <path for generated tar file> <image name>

  • move from your local machine to remote vm

    scp -i /path/to/key.pem whois-api.tar <username>@<public-ip>:~/your/destination/dir/

  • cd to your "destionation/dir" then load the image

    docker load -i <path to image tar file>

Run the app

Run the app as you did in local machine

$ docker-compose up