## Integration with Kubernetes This Document decribes how to deploy Harbor on Kubernetes. It has been verified on **Kubernetes v1.6.5** and **Harbor v1.2.0** ### Prerequisite * You should have domain knowledge about Kubernetes (Replication Controller, Service, Persistent Volume, Persistent Volume Claim, Config Map). * **Optional**: Load the docker images onto woker nodes. *If you skip this step, worker node will pull images from Docker Hub when starting the pods.* * Download the offline installer of Harbor v1.2.0 from the [release](https://github.com/vmware/harbor/releases) page. * Uncompress the offline installer and get the images tgz file harbor.*.tgz, transfer it to each of the worker nodes. * Load the images into docker: ``` docker load -i harbor.*.tgz ``` ### Configuration We provide a python script `make/kubernetes/k8s-prepare` to generate Kubernetes ConfigMap files. The script is written in python, so you need a version of python in your deployment environment. Also the script need `openssl` to generate private key and certification, make sure you have a workable `openssl`. There are some args of the python script: - -f: Default Value is `../harbor.cfg`. You can specify other config file of Harbor. - -k: Path to https private key. This arg can overwrite the value of `ssl_cert_key` in `harbor.cfg`. - -c: Path to https certification. This arg can overwrite the value of `ssl_cert` in `harbor.cfg`. #### Basic Configuration These Basic Configuration must be set. Otherwise you can't deploy Harbor on Kubernetes. - `make/harbor.cfg`: Basic config of Harbor. Please refer to `harbor.cfg`. ``` #Hostname is the endpoint for accessing Harbor, #To accept access from outside of Kubernetes cluster, it should be set to a worker node. hostname = 10.192.168.5 ``` - `make/kubernetes/**/*.svc.yaml`: Specify the service of pods. In particular, the externalIP should be set in `make/kubernetes/nginx/nginx.svc.yaml`: ``` ... metadata: name: nginx spec: ports: - name: http port: 80 selector: name: nginx-apps externalIPs: - 10.192.168.5 ``` - `make/kubernetes/**/*.rc.yaml`: Specify configs of containers. - `make/kubernetes/pv/*.pvc.yaml`: Persistent Volume Claim. You can set capacity of storage in these files. example: ``` resources: requests: # you can set another value to adapt to your needs storage: 100Gi ``` - `make/kubernetes/pv/*.pv.yaml`: Persistent Volume. Be bound with `*.pvc.yaml`. PVs and PVCs are one to one correspondence. If you changed capacity of PVC, you need to set capacity of PV together. example: ``` capacity: # same value with PVC storage: 100Gi ``` In PV, you should set another way to store data rather than `hostPath`: ``` # it's default value, you should use others like nfs. hostPath: path: /data/registry ``` For more infomation about storage solution, Please check [Kubernetes Document](http://kubernetes.io/docs/user-guide/persistent-volumes/) Then you can generate ConfigMap files by : ``` python make/kubernetes/k8s-prepare ``` These files will be generated: - make/kubernetes/jobservice/jobservice.cm.yaml - make/kubernetes/mysql/mysql.cm.yaml - make/kubernetes/nginx/nginx.cm.yaml - make/kubernetes/registry/registry.cm.yaml - make/kubernetes/ui/ui.cm.yaml - make/kubernetes/adminserver/adminserver.cm.yaml #### Advanced Configuration If Basic Configuration was not covering your requirements, you can read this section for more details. `./k8s-prepare` has a specify format of placeholder: - `{{key}}`: It means we should replace the placeholder with the value in `config.cfg` which name is `key`. - `{{num key}}`: It's used for multiple lines text. It will add `num` spaces to the leading of every line in text. You can find all configs of Harbor in `make/kubernetes/templates/`. There are specifications of these files: - `jobservice.cm.yaml`: ENV and web config of jobservice - `mysql.cm.yaml`: Root passowrd of MySQL - `nginx.cm.yaml`: Https certification and nginx config. If you are fimiliar with nginx, you can modify it. - `registry.cm.yaml`: Token service certification and registry config Registry use filesystem to store data of images. You can find it like: ``` storage: filesystem: rootdirectory: /storage ``` If you want use another storage backend, please see [Docker Doc](https://docs.docker.com/datacenter/dtr/2.1/guides/configure/configure-storage/) - `ui.cm.yaml`: Token service private key, ENV and web config of ui. - `adminserver.cm.yaml`: Initial values of configuration attributes of Harbor. `ui`, `jobservice` and `adminserver` are powered by beego. If you are fimiliar with beego, you can modify configs in `ui.cm.yaml`, `jobservice.cm.yaml` and `adminserver.cm.yaml`. ### Running When you finished your configuring and generated ConfigMap files, you can run Harbor on kubernetes with these commands: ``` # create pv & pvc kubectl apply -f make/kubernetes/pv/log.pv.yaml kubectl apply -f make/kubernetes/pv/registry.pv.yaml kubectl apply -f make/kubernetes/pv/storage.pv.yaml kubectl apply -f make/kubernetes/pv/log.pvc.yaml kubectl apply -f make/kubernetes/pv/registry.pvc.yaml kubectl apply -f make/kubernetes/pv/storage.pvc.yaml # create config map kubectl apply -f make/kubernetes/jobservice/jobservice.cm.yaml kubectl apply -f make/kubernetes/mysql/mysql.cm.yaml kubectl apply -f make/kubernetes/nginx/nginx.cm.yaml kubectl apply -f make/kubernetes/registry/registry.cm.yaml kubectl apply -f make/kubernetes/ui/ui.cm.yaml kubectl apply -f make/kubernetes/adminserver/adminserver.cm.yaml # create service kubectl apply -f make/kubernetes/jobservice/jobservice.svc.yaml kubectl apply -f make/kubernetes/mysql/mysql.svc.yaml kubectl apply -f make/kubernetes/nginx/nginx.svc.yaml kubectl apply -f make/kubernetes/registry/registry.svc.yaml kubectl apply -f make/kubernetes/ui/ui.svc.yaml kubectl apply -f make/kubernetes/adminserver/adminserver.svc.yaml # create k8s rc kubectl apply -f make/kubernetes/registry/registry.rc.yaml kubectl apply -f make/kubernetes/mysql/mysql.rc.yaml kubectl apply -f make/kubernetes/jobservice/jobservice.rc.yaml kubectl apply -f make/kubernetes/ui/ui.rc.yaml kubectl apply -f make/kubernetes/nginx/nginx.rc.yaml kubectl apply -f make/kubernetes/adminserver/adminserver.rc.yaml ``` After the pods are running, you can access Harbor's UI via the configured endpoint `10.192.168.5` or issue docker commands such as `docker login 10.192.168.5` to interact with the registry. ####Limitation 1. Current deployment is http only, to enable https you need to either add another layer of proxy or modify the nginx.cm.yaml to enable https and include a correct certificate 2. Current deployment does not include Clair and Notary, which are supported in docker-compose deployment. They will be supported in near futuer, stay tuned.