Introduction to GitHub Actions

Introduction to
GitHub Actions2019/05/15
Bo-Yi Wu
https://github.com/appleboy

About me
• Software Engineer in Mediatek
• Member of Drone CI/CD Platform
• Member of Gitea Platform
• Member of Gin Golang Framework
• Teacher of Udemy Platform: Golang + Drone
https://blog.wu-boy.com

GitHub Flow
14
Develop
Git Push
Git Tag
Develop
Git Push
Git Tag
Testing
Deploy
Deploy
Deploy
Production
Staging
Production
Testing
Deploy
Staging

GitHub Flow + Git Flow
in opensource
https://github.com/go-gitea/gitea

CI/CD Platform
Drone Travis Jenkins
GitLab Circle Codeship

https://github.com/features/actions
Beta

https://github.com/marketplace?type=actions
Marketplace

https://developer.github.com/actions/
Developer Guide

Container Based
CI/CD Platform

Current runtime resource
• 1 virtual CPU
• Up to 3.75GB of memory
• 100GB of disk space

workflow "Remote ssh commands" {
on = "push"
resolves = [
"Remote ssh commands",
]
}
main.workﬂow

action "Remote ssh commands" {
uses = "appleboy/ssh-action@master"
secrets = [
"HOST",
"PASSWORD",
]
args = [
"--user", "actions",
"--script", "whoami",
]
}
main.workﬂow

https://github.com/appleboy/ssh-action/actions

Download the docker image for caching
Cache layer
http://bit.ly/docker-cache-build

Scheduling a workflow
┌───────────── minute (0 - 59)
│ ┌───────────── hour (0 - 23)
│ │ ┌───────────── day of the month (1 - 31)
│ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
│ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
│ │ │ │ │
│ │ │ │ │
│ │ │ │ │
* * * * *
workflow "New workflow" {
on = "schedule(*/15 * * * *)"
resolves = ["Hello World"]
}

You can’t see the log in progress job

But you can’t restart the job
http://www.thebrokeagent.com/wtf-listing-description-of-the-week/

$ git reset —soft HEAD^
$ git commit -a -m ‘foo’
$ git push origin master -f
Restart the job

Secrets in Github Actions
Setting -> Secrets in left sidebar

Introduction to GitHub Actions

Don’t support
organization secrets
duplicate of secrets in many repository of organization

Don’t support
thirty party
secret service

You need to write
CLI ﬂag in command
drone-ssh -u foo -p foopass -s whoami
drone-ssh -u bar -p barpass -s whoami

main.workﬂow
secrets = [
"PASSWORD",
]
args = [
]
secrets = [
"PASSWORD",
]
args = [
]
Server 01 Server 02
docker run -e PASSWORD=xxx appleboy/drone-ssh
-u actions -s whoami

main.workﬂow
secrets = [
"PASSWORD01",
]
args = [
"-p", "$PASSWORD01",
]
secrets = [
"PASSWORD02",
]
args = [
"-p", "$PASSWORD02",
]
Server 01 Server 02

action "Publish" {
needs = "Tag"
uses = "actions/npm@master"
args = "publish --access public"
secrets = ["NPM_AUTH_TOKEN"]
}
https://github.com/actions/npm

How to add multiple
auth token
of npm registry?

kind: pipeline
name: default
steps:
- name: build
image: appleboy/drone-ssh
environment:
USERNAME:
from_secret: username
PASSWORD:
from_secret: password

FROM appleboy/drone-ssh:1.5.0-linux-amd64
# Github labels
LABEL "com.github.actions.name"="SSH Commands"
LABEL "com.github.actions.description"="some description"
LABEL "com.github.actions.icon"="terminal"
LABEL “com.github.actions.color"="gray-dark"
LABEL "repository"="https://github.com/appleboy/ssh-action"
LABEL "homepage"="https://github.com/appleboy"
LABEL "maintainer"="Bo-Yi Wu <appleboy.tw@gmail.com>"
LABEL "version"="0.0.1"
ADD entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

#!/bin/sh
set -eu
export GITHUB="true"
sh -c "/bin/drone-ssh $*"

action "Tag Docker Image" {
needs = ["build"]
uses = "actions/docker/cli@master"
args = "tag hello:$GITHUB_SHA"
}

action "Tag Docker Image" {
needs = ["build"]
uses = "actions/docker/cli@master"
args = ["tag", "hello:$GITHUB_SHA"]
}

action "Hello World" {
uses = "./my-action"
env = {
FIRST_NAME = "Mona"
MIDDLE_NAME = "Lisa"
LAST_NAME = "Octocat"
}
}

GitHub Variable
• GITHUB_WORKFLOW
• GITHUB_ACTION
• GITHUB_EVNETNAME
• GITHUB_SHA
• GITHUB_REF

I don’t know how to
get the author
email, name or
commit message
Resolve this problem using GitHub API request?

Publishing your action
in the GitHub Marketplace

FROM appleboy/drone-ssh:1.5.0-linux-amd64
# Github labels
LABEL "com.github.actions.name"="SSH Commands"
LABEL "com.github.actions.description"="some description"
LABEL "com.github.actions.icon"="terminal"
LABEL “com.github.actions.color"="gray-dark"
LABEL "repository"="https://github.com/appleboy/ssh-action"
LABEL "homepage"="https://github.com/appleboy"
LABEL "maintainer"="Bo-Yi Wu <appleboy.tw@gmail.com>"
LABEL "version"="0.0.1"
ADD entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]
please make sure that there is no problem with Dockerfile in LABEL

Create New Tag and
Publish Release

https://github.com/marketplace/actions/ssh-commands

Some action I created
• appleboy/ssh-action
• appleboy/scp-action
• appleboy/facebook-action
• appleboy/telegram-action
• appleboy/jenkins-action
• appleboy/gitlab-ci-ation
• appleboy/discord-action

http://bit.ly/golang-2019

http://bit.ly/drone-2019

Introduction to GitHub Actions

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