What is AutoCD and what can it do for me? Docker and Kubernetes are everywhere, everybody wants to use it but it is not always simple to write a fitting docker file that satisfies all constrains. Even though it would be possible do generate an image by coping and pasting all the bits you might need, the chance of an error are not insignificant. To prevent errors like that and to make docker/kubernetes more accessible we created AutoCD.
AutoCD helps you to get your project ready for your k8s cluster. The program will automatically generate a fitting docker image and deploy that to your cluster. To do this AutoCD detects the project language (Java 8+, Go, Vue.js, Node.js are supported) and uses the matching, predefined docker image (if there is none found within your root folder), to deploy the project to your cluster. It can also take down old, not used projects from the cluster. All you have to do to use AutoCD is, to include it into your gitlab-ci.yml file and, if you have one, include a JSON file for configure AutoCD. The JSON file allows you to make specific changes to the configuration (e.g. port, volumes).
The latest version can be found here.
If you want to integrate AutoCD to your project, you need to adjust the gitlab-ci.yml. Add the following to the .script option.
script:
- curl -L https://github.com/worldiety/AutoCD/releases/latest/download/AutoCD.jar -o app.jar
- java -jar app.jar ${KUBE_URL}${KUBE_TOKEN}${KUBE_CA_PEM_FILE}${BUILDTYPE}This will download and execute the AutoCD tool. All other variables will be obtained from your global GitLab configuration. The final configuration should look like this:
image: fredlahde/dind-java
services:
- docker:dind
variables:
DOCKER_TLS_CERTDIR: ""
stages:
- deploy-prod
- deploy-dev
.deploy:
stage: deploy
before_script:
- apk add curl
- apk add git
- git --no-pager show $(git log --pretty=format:'%h' -n 2 | tail -n 1):autocd.json 2>/dev/null 1>oldautocd.json ||true
environment: default #Needed for CI to autopopulate KUBE_ fields
tags:
- docker-build-runner
script:
- curl -L https://github.com/worldiety/AutoCD/releases/latest/download/AutoCD.jar -o app.jar
- java -jar app.jar ${KUBE_URL}${KUBE_TOKEN}${KUBE_CA_PEM_FILE}${BUILDTYPE}
deploy-prod:
extends: .deploy
stage: deploy-prod
variables:
BUILDTYPE: prod
only:
- master
In case you want change certain values, set them in a JSON file. See the table below for parameters to specify. As an example, here is a JSON file
{
"otherImages": [
{
"registryImagePath": "redis:latest",
"containerPort": 6379,
"servicePort": 6379,
"publiclyAccessible": "false",
"serviceName": "redis"
},
{
"registryImagePath": "path/to/registry/service/image",
"serviceName": "content-service",
"subdomains": {
"dev": "yourapp.dev.com",
"edit": "yourapp.edit.com",
"stage": "yourapp.com"
},
"environmentVariables": {
"dev": {
"SPRING_PROFILES_ACTIVE": "dev",
"REDIS_URL": "redis",
"SYNC_URL": "http://sync-service"
},
"edit": {
"SPRING_PROFILES_ACTIVE": "stage",
"REDIS_URL": "redis",
"SYNC_URL": "http://sync-service",
},
"stage": {
"SPRING_PROFILES_ACTIVE": "prod",
"REDIS_URL": "redis",
}
}
},
{
"registryImagePath": "path/to/registry/service/image",
"serviceName": "sync-service",
"subdomains": {
"dev": "yourapp.dev.com",
"edit": "yourapp.edit.com",
"stage": "yourapp.com"
},
"environmentVariables": {
"dev": {
"SPRING_PROFILES_ACTIVE": "dev",
"REDIS_URL": "redis"
},
"edit": {
"SPRING_PROFILES_ACTIVE": "stage",
"REDIS_URL": "redis"
},
"stage": {
"SPRING_PROFILES_ACTIVE": "prod",
"REDIS_URL": "redis"
}
}
}
],
"containerPort": 3000,
"environmentVariables": {
"dev": {
"ENVIRONMENT": "dev",
"CONTENT_SERVICE_URL": "https://content-dev.de",
"NEWSLETTER_SERVICE_URL": "https://newsletter.de",
"EDITOR_URL": "https://cms-editor.de/js/app.js"
},
"edit": {
"ENVIRONMENT": "edit",
"NEWSLETTER_SERVICE_URL": "https://newsletter.de"
},
"stage": {
"ENVIRONMENT": "stage",
"NEWSLETTER_SERVICE_URL": "https://newsletter.de",
}
},
"serviceName":"website",
"subdomains": {
"dev": "yourapp.dev.com",
"edit": "yourapp.edit.com",
"stage": "yourapp.com"
},
"resources": {
"limits": {
"cpu": "0.1",
"memory": "200Mi"
},
"requests": {
"cpu": "0.01",
"memory": "50Mi"
}
}| Parameter | Function | Example | Type | default |
|---|---|---|---|---|
| containerPort | defines which port should be exposed | 8080 | int | 8080 |
| servicePort | defines which port will be exposed to the outside | 80 | int | 80 |
| replicas | number of stable sets of replica Pods running at any given time | 1 | int | 1 |
| publiclyAccessible | allows to connect from the outside. Note: if false, you will not receive a subdomain | true/false | Boolean | true |
| terminationGracePeriod | time to shut down the container, if exceeded, container will be terminated forcefully | 60L | long | 60L |
| dockerImagePath | Path to the Docker Image(Docker images residing in the root directory will be picked up automatically) | path/to/image/ | String | |
| registryImagePath | Path to images from the registry(note: if this is set inside the root autocd configuration, autocd will not attempt to build a new image) Usually only set in "otherImages" or for debugging | registry.worldiety.net/flahde/redistest | String | |
| subdomains | maps the environment to a fitting URL | "dev": "yourapp.dev.worldiety.de" | String | |
| shouldHost | if true, deployment to cluster, not if false | true/false | boolean | true |
| volumes | list of volumes to mount | List | ||
| environmentVariables | define environments variables for a container | Map<String, String> | ||
| otherImages | list of autoCD objects which will be processed recursively | List | ||
| args | define arguments that will run in the Pod | "HOSTNAME", "KUBERNETES_PORT" | List | |
| serviceName | name for your service, can be used as for example: redis to access the redis instance in the cluster | String | null | |
| subdomain | subdomain for your webapp(If none is specified, one will be generated and announced at the end of the CI build | yourapp.cloudiety.de | String | null |
{
"otherImages": [
{
"volumes": [
{
"volumeMount": "/var/redis",
"folderPermission": "777"
}
],
"registryImagePath": "redis:latest",
"args": [
"--save 15 1",
"--dir /var/redis"
],
"containerPort": 6379,
"servicePort": 6379,
"publiclyAccessible": "false",
"serviceName": "redistest-redis-dev-service"
}
]
}To run the autoCD.jar, Java 12 is necessary. Variables, for example KUBE_URL, KUBE_TOKEN, KUBE_CA_PEM_FILE, BUILDTYPE should be set in your GitLab deployment variables. You do not need to worry about these, since they are created by GitLab when establishing a cluster or linking your GitLab instance to an already existing cluster. Therefore they have nothing to do with the AutoCD tool directly. If you want to learn more about kubernetes and Gitlab, please refer to the official GitLab documentation.
The parameter class 'volume' has parameters of its own:
- volumeMount: name of the Volume
- volumeSize: size string from k8s (e.g. 1Gi, 100Mi)
- folderPermission: permissions within the folder
- retainVolume: boolean value with determines if the volume should be retained after a restart
If AutoCD finds any file named 'build.sh' within your project rood folder, AutoCD will use the build.sh file you provide. If there is none, AutoCD will use a default build.sh file. However, after executing the build.sh, AutoCD expects a compiled project with fitting files (e.g. yourProject.jar inside of /build/libs if it's a Java project).
If there is any need for static data (e.g. images, fonts) make sure, that those files are located within the static folder (folder must be named static) inside your project root directory. AutoCD will make sure, that the static folder will be copied onto the pod and available at the working directory.