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https://github.com/banzaicloud/pvc-operator
https://github.com/banzaicloud/pvc-operator
Last synced: 3 months ago
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- Host: GitHub
- URL: https://github.com/banzaicloud/pvc-operator
- Owner: banzaicloud
- License: apache-2.0
- Created: 2018-04-16T08:29:22.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2020-10-02T08:42:52.000Z (about 4 years ago)
- Last Synced: 2024-05-22T14:31:40.809Z (6 months ago)
- Language: Go
- Size: 4.42 MB
- Stars: 51
- Watchers: 9
- Forks: 11
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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## PVC Operator
This operator builds upon the new [Kubernetes operators SDK](https://banzaicloud.com/blog/operator-sdk/) and used on different cloud providers.
### Introduction
This operator makes using [Kubernetes Persistent Volumes](https://kubernetes.io/docs/concepts/storage/persistent-volumes/) easier on cloud providers, by dynamically creating the required accounts, classes and more. It allows to use exactly the same [Helm](https://helm.sh) chart on all the supported providers, there is no need to create cloud specific Helm charts.
The Currently supported list of Providers/StorageClasses are:
- Azure(AKS)
- AzureFile
- AzureDisk
- NFS
- Amazon
- AWSElasticBlockStore
- NFS
- Google
- GCEPersistentDisk
- NFS
### Installation
- Branch `0.0.2` contains an earlier version of this operator if you want to use this please follow this guide:
The user should use the [operator.yaml](https://github.com/banzaicloud/pvc-operator/blob/0.0.2/deploy/operator.yaml)
to deploy the operator to a Kubernetes cluster. If the cluster uses [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/) deploy the [rbac.yaml](https://github.com/banzaicloud/pvc-operator/blob/0.0.2/deploy/rbac.yaml) first and add the following line after the specs in the `operator.yaml`.
```serviceAccountName: pvc-operator```
- In case of `master` branch, please use the [crd.yaml](https://github.com/banzaicloud/pvc-operator/blob/master/deploy/crd.yaml) first then
deploy the operator itself by using the [operator.yaml](https://github.com/banzaicloud/pvc-operator/blob/master/deploy/operator.yaml).
If the cluster uses [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/) deploy the [rbac.yaml](https://github.com/banzaicloud/pvc-operator/blob/master/deploy/rbac.yaml).
### Cloud Specific Requirements
In case of `AzureFile` a Storage Account needs to be created. The operator handles the creation automatically
but some permissions have to be set.
- MSI has to be [enabled](https://docs.microsoft.com/en-us/azure/active-directory/managed-service-identity/tutorial-linux-vm-access-arm#enable-msi-on-your-vm)
- Grant Access to your VMs to [create](https://docs.microsoft.com/en-us/azure/active-directory/managed-service-identity/tutorial-linux-vm-access-arm#grant-your-vm-access-to-a-resource-group-in-azure-resource-manager) a Storage Account
Instead of adding `Read` role use the `Storage Account Owner`.
### Usage
The given chart should include a `Persistent Volume Claim` which includes a [StorageClass](https://kubernetes.io/docs/concepts/storage/storage-classes/) name and an `Access Mode`. If the chosen Access Mode is supported on the required cloud provider the operator will create a proper `StorageClass`. This class will be reused by other charts as well.
### FAQ
#### 1. How does this project uses Kubernetes Namespaces?
The operator supports multiple Kubernetes Namespaces.
#### 2. How is the cloud provider determined?
To determine the cloud provider we use the `metadata` server accessible from every virtual machine within the cloud.
#### 3. Do I need to add my cloud related credentials to this project?
No need, this project determines every credentials from the `metadata` server and uses the assumption that you have
a couple of right because this `Operator` runs inside a Kubernetes cluster (IAM or instance profile roles, etc).
#### 4. How come that the NFS type StorageClass can be used in any cloud provider?
The NFS StorageClass solution is based on the [Kubernetes external-storages](https://github.com/kubernetes-incubator/external-storage/tree/master/nfs) project. It uses it's own NFS server deployment which requires a `ReadWriteOnly` Kubernetes Persistent Volume and shares this across the cluster.
#### 5. Why this project exists?
Here at [Banzai Cloud](https://banzaicloud.com) we try to automate everything so you don't have to. If you need to provision a Kubernetes cluster please check out [Pipeline](https://github.com/banzaicloud/pipeline). If you already have one, but you are struggling to find and configure the right `Persistent Storage` for your need then this project is for you.
#### 6. What's next for this project for the near future?
- The priority will be to support more `ReadWriteMany` StorageClasses on all providers. We prefer to build on cloud
specific storage solutions, but more generic solutions will come as well.
- We would like to add support to create an object storage inside a Kubernetes Cluster. This approach will help e.g in case of
[Spark History Server](https://banzaicloud.com/blog/spark-history-server-cloud/).
#### 7. Is this project production ready?
Although we use it internally, it's not yet. We need to add at least some unit tests and potentially an integration test too.