# ArangoDB Kubernetes Operator [![Docker Pulls](https://img.shields.io/docker/pulls/arangodb/kube-arangodb.svg)](https://hub.docker.com/r/arangodb/kube-arangodb/) ArangoDB Kubernetes Operator helps to run ArangoDB deployments on Kubernetes clusters. To get started, follow the Installation instructions below and/or read the [tutorial](https://www.arangodb.com/docs/stable/tutorials-kubernetes.html). ## State The ArangoDB Kubernetes Operator is still in **development**. Running ArangoDB deployments (single, active-failover or cluster) is reasonably stable, and we're in the process of validating production readiness of various Kubernetes platforms. The feature set of the ArangoDB Kubernetes Operator is close to what it is intended to be. [Documentation](./docs/README.md) ### Production readiness state Beginning with Version 0.3.11 we maintain a production readiness state for individual new features, since we expect that new features will first be released with an "alpha" or "beta" readiness state and over time move to full "production readiness". The following table has the general readiness state, the table below covers individual newer features separately. | Platform | Kubernetes Version | ArangoDB Version | ArangoDB Operator Version | State | Remarks | Provider Remarks | |---------------------|--------------------|------------------|---------------------------|-------------|-----------------------|------------------------------------| | Google GKE | 1.14 | >= 3.3.13 | | Production | Don't use micro nodes | | | Google GKE | 1.15 | >= 3.3.13 | | Production | Don't use micro nodes | | | Azure AKS | 1.14 | >= 3.3.13 | | Production | | | | Azure AKS | 1.15 | >= 3.3.13 | | Production | | | | Amazon EKS | 1.14 | >= 3.3.13 | | Production | | [Amazon EKS](./docs/providers/eks) | | IBM Cloud | 1.14 | >= 3.4.6.1 | >= 0.3.11 | Production | | | | OpenShift | 3.11 | >= 3.3.13 | | Production | | | | OpenShift | 4.2 | >= 3.3.13 | | In Progress | | | | BareMetal (kubeadm) | 1.14 | >= 3.3.13 | | Production | | | | Minikube | 1.14 | >= 3.3.13 | | Devel Only | | | | Other | 1.14 | >= 3.3.13 | | Devel Only | | | Feature-wise production readiness table: | Feature | ArangoDB K8s Operator Version | Production Readiness | Remarks | |------------------------------|---------------------------------------|---------------------------|-------------------| | Pod Disruption Budgets | 0.3.10 | new - alpha | | | | 0.3.11 | beta | | | Volume Resizing | 0.3.10 | new - beta | | | | 0.3.11 | beta | | | Disabling of liveness probes | 0.3.10 | new - beta | | | | 0.3.11 | production ready | | | Volume Claim Templates | 0.3.11 | new - alpha | | | Prometheus Metrics export | 0.3.11 | new - alpha | needs Prometheus | | User sidecar containers | 0.3.11 | new - alpha | | ## Release notes for 0.3.16 In this release we have reworked the Helm charts. One notable change is that we now create a new service account specifically for the operator. The actual deployment still runs by default under the `default` service account unless one changes that. Note that the service account under which the ArangoDB runs needs a small set of extra permissions. For the `default` service account we grant them when the operator is deployed. If you use another service account you have to grant these permissions yourself. See [here](docs/Manual/Deployment/Kubernetes/DeploymentResource.md#specgroupserviceaccountname-string) for details. ## Installation of latest release using Kubectl ```bash kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/0.4.5/manifests/arango-crd.yaml kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/0.4.5/manifests/arango-deployment.yaml # To use `ArangoLocalStorage`, also run kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/0.4.5/manifests/arango-storage.yaml # To use `ArangoDeploymentReplication`, also run kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/0.4.5/manifests/arango-deployment-replication.yaml ``` This procedure can also be used for upgrades and will not harm any running ArangoDB deployments. ## Installation of latest release using Helm Only use this procedure for a new install of the operator. See below for upgrades. ```bash # The following will install the custom resources required by the operators. helm install https://github.com/arangodb/kube-arangodb/releases/download/0.4.5/kube-arangodb-crd-0.4.5.tgz # The following will install the operator for `ArangoDeployment` & # `ArangoDeploymentReplication` resources. helm install https://github.com/arangodb/kube-arangodb/releases/download/0.4.5/kube-arangodb-0.4.5.tgz # To use `ArangoLocalStorage`, set field `operator.features.storage` to true helm install https://github.com/arangodb/kube-arangodb/releases/download/0.4.5/kube-arangodb-0.4.5.tgz --set "operator.features.storage=true" ``` ## Upgrading the operator using Helm To upgrade the operator to the latest version with Helm, you have to delete the previous deployment and then install the latest. **HOWEVER**: You *must not delete* the deployment of the custom resource definitions (CRDs), or your ArangoDB deployments will be deleted! Therefore, you have to use `helm list` to find the deployments for the operator (`kube-arangodb`) and of the storage operator (`kube-arangodb-storage`) and use `helm delete` to delete them using the automatically generated deployment names. Here is an example of a `helm list` output: ``` % helm list NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE steely-mule 1 Sun Mar 31 21:11:07 2019 DEPLOYED kube-arangodb-crd-0.3.9 default vetoed-ladybird 1 Mon Apr 8 11:36:58 2019 DEPLOYED kube-arangodb-0.3.10-preview default ``` So here, you would have to do ```bash helm delete vetoed-ladybird ``` but **not delete `steely-mule`**. Then you could install the new version with `helm install` as normal: ```bash # The following will install the operator for `ArangoDeployment` & # `ArangoDeploymentReplication` resources. helm install https://github.com/arangodb/kube-arangodb/releases/download/0.4.5/kube-arangodb-0.4.5.tgz # To use `ArangoLocalStorage`, set field `operator.features.storage` to true helm install https://github.com/arangodb/kube-arangodb/releases/download/0.4.5/kube-arangodb-0.4.5.tgz --set "operator.features.storage=true" ``` ## Building ```bash DOCKERNAMESPACE= make kubectl apply -f manifests/arango-deployment-dev.yaml # To use `ArangoLocalStorage`, also run kubectl apply -f manifests/arango-storage-dev.yaml # To use `ArangoDeploymentReplication`, also run kubectl apply -f manifests/arango-deployment-replication-dev.yaml ```