If you are using automatic building and testing with Travis CI, it would be nice to automatically deploy code. So your pull requests will be tested and after you merge them to master branch - code will be redeployed.

Prepare SSH key for Travis

We need to store private key base64 encoded to Travis.

• Create or reuse private key which can connect to your production server
• Ensure key is NOT encrypted
• Encode key to base64

  cat ~/.ssh/your_private_key | base64 > privkey.base64
  

Save private key in Travis

In your repository settings create environment variable ssh_key with base64 encoded private key.

Variable should be created this way:

Add deployment steps to .travis.yml

Add server to known hosts

You need to add your server’s IP address or domain to known hosts or your deployment job will stuck on something like this

The authenticity of host '...' can't be established.
ECDSA key fingerprint is ....
Are you sure you want to continue connecting (yes/no)? 

You can fix it this way

addons:
  ssh_known_hosts: 188.226.180.247

Add key to ssh-agent

Before deployment we need to decode key from base64 format and add it to ssh-agent

before_deploy:
  - echo "$ssh_key" | base64 -d > /tmp/deploy_key
  - eval "$(ssh-agent -s)"
  - chmod 600 /tmp/deploy_key
  - ssh-add /tmp/deploy_key

Deploy with rsync

Copy builded artifact to server everytime there is new commit to master branch in your GIT repository.

deploy:
  provider: script
  skip_cleanup: true
  script:
    - rsync -r --delete-after --quiet $TRAVIS_BUILD_DIR/PATH_TO_ARTIFACT root@YOUR_SERVER:PATH_ON_SERVER
  on:
    branch: master

Change these constants

• PATH_TO_ARTIFACT - path to builded code in Travis workspace
• YOUR_SERVER - IP address or name of your server
• PATH_ON_SERVER - Path where should be code on your server

Restart service

If you need to restart something after code is deployed, you can do it this way

after_deploy:
  - ssh root@YOUR_SERVER "service XXX restart"

This will restart any service on Ubuntu. But you can run any bash command instead of it.