101 lines
3 KiB
Markdown
101 lines
3 KiB
Markdown
Travis CI Tests
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====================
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This directory contains a script `run_tests.sh` that is executed by Travis CI.
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The script builds a test firmware, deploys it on one of the test servers and
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runs it.
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The script will not return an error if deployment to one of the test servers has
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failed. It is done this way not to fail a build if a test server is down.
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The script will return an error if deployment was successful but tests failed.
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Test servers
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------------
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Test server is a linux host that is accessible from the Internet by a static IP.
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It should have at least one ESP8266 module connected to a USB port. The module
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should be capable restarting and switching to boot mode via a serial port.
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All popular **NodeMCU** and **Wemos** modules will work.
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To run tests on a server it should provide SSH access. SSH daemon should be
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configured to authenticate using keys.
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Test server running on Raspberry PI:
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![Raspberry PI Test server][example-test-server]
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### Test server requirements
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* Linux host
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* Public static IP
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* One or two ESP8266 modules connected to USB ports
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* SSH access from the Internet (with public key from Travis CI)
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* Python3
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* [esptool.py] installed
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* pySerial python module `pip install pyserial`
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### Create SSH keys for Travis
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[Here][travis-ssh-deploy] is a good article about Travis deployment using SSH.
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The problem with SSH access from Travis to a server is that it should have
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a private key. But this key should not be publicly available.
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Hopefully Travis allows to encrypt certain files and only decrypt them at build
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stage. So the sensitive file is stored in the repository encrypted.
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Generate a new key pair:
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```bash
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ssh-keygen -t rsa -b 4096 -C '<repo>@travis-ci.org' -f ./<server_name>_rsa
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```
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To encrypt a private key you need a command line Travis client.
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To install it run:
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```bash
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gem install travis
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```
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Or refer [the official installation instructions][travis-install].
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The following command will encrypt a file and modify .travis.yml:
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```bash
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travis encrypt-file <server_name>_rsa --add
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```
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Deploy public key to a test server:
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```bash
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ssh-copy-id -i <server_name>_rsa.pub <ssh-user>@<deploy-host>
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```
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Add the following lines in the .travis.yml:
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```yml
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addons:
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ssh_known_hosts: <server_ip>
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```
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```yml
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before_install:
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- openssl aes-256-cbc aes-256-cbc -K $encrypted_<...>_key -iv $encrypted_<...>_iv -in <server_name>_rsa.enc -out /tmp/<server_name>_rsa -d
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- eval "$(ssh-agent -s)"
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- chmod 600 /tmp/<server_name>_rsa
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- ssh-add /tmp/<server_name>_rsa
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```
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Remove keys and stage files for commit:
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```bash
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rm -f <server_name>_rsa <server_name>_rsa.pub
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git add <server_name>_rsa.enc .travis.yml
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```
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### Add test server
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The final step is to add a server to the test runner script.
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Add a new item into an array in `run_tests.sh`:
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```bash
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TEST_SERVERS[2]="IP=<server_ip>;User=<ssh_user_name>;Type=<solo|dual>"
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```
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[esptool.py]: https://github.com/espressif/esptool
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[travis-ssh-deploy]: https://oncletom.io/2016/travis-ssh-deploy
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[travis-install]: https://github.com/travis-ci/travis.rb#installation
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[example-test-server]: ./test_server_example.png
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