8.6 KiB
ArangoDB Kubernetes Operator
ArangoDB Kubernetes Operator helps to run ArangoDB deployments on Kubernetes clusters.
To get started, follow the Installation instructions below and/or read the tutorial.
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.
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 | ||
| 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
for details.
Installation of latest release using Kubectl
kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/1.0.3/manifests/arango-crd.yaml
kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/1.0.3/manifests/arango-deployment.yaml
# To use `ArangoLocalStorage`, also run
kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/1.0.3/manifests/arango-storage.yaml
# To use `ArangoDeploymentReplication`, also run
kubectl apply -f https://raw.githubusercontent.com/arangodb/kube-arangodb/1.0.3/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.
# The following will install the custom resources required by the operators.
helm install https://github.com/arangodb/kube-arangodb/releases/download/1.0.3/kube-arangodb-crd-1.0.3.tgz
# The following will install the operator for `ArangoDeployment` &
# `ArangoDeploymentReplication` resources.
helm install https://github.com/arangodb/kube-arangodb/releases/download/1.0.3/kube-arangodb-1.0.3.tgz
# To use `ArangoLocalStorage`, set field `operator.features.storage` to true
helm install https://github.com/arangodb/kube-arangodb/releases/download/1.0.3/kube-arangodb-1.0.3.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
helm delete vetoed-ladybird
but not delete steely-mule. Then you could install the new version
with helm install as normal:
# The following will install the operator for `ArangoDeployment` &
# `ArangoDeploymentReplication` resources.
helm install https://github.com/arangodb/kube-arangodb/releases/download/1.0.3/kube-arangodb-1.0.3.tgz
# To use `ArangoLocalStorage`, set field `operator.features.storage` to true
helm install https://github.com/arangodb/kube-arangodb/releases/download/1.0.3/kube-arangodb-1.0.3.tgz --set "operator.features.storage=true"
Building
DOCKERNAMESPACE=<your dockerhub account> 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