Plugins for Google Cloud Platform (GCP)

Overview

This repository contains these plugins to support running Velero on GCP:

An object store plugin for persisting and retrieving backups on Google Cloud Storage. Content of backup is log files, warning/error files, restore logs.
A volume snapshotter plugin for creating snapshots from volumes (during a backup) and volumes from snapshots (during a restore) on Google Compute Engine Disks.

You can run Kubernetes on Google Cloud Platform in either:

Kubernetes on Google Compute Engine virtual machines
Google Kubernetes Engine

For common use-cases, take a look at the Examples page.

Compatibility

Below is a listing of plugin versions and respective Velero versions that are compatible.

Plugin Version	Velero Version
v1.1.x	v1.4.x
v1.0.x	v1.3.x
v1.0.x	v1.2.0

Setup

To set up Velero on GCP, you:

Create an GCS bucket
Set permissions for Velero
Install and start Velero

If you do not have the gcloud and gsutil CLIs locally installed, follow the user guide to set them up.

Create an GCS bucket

Velero requires an object storage bucket in which to store backups, preferably unique to a single Kubernetes cluster (see the FAQ for more details). Create a GCS bucket, replacing the <YOUR_BUCKET> placeholder with the name of your bucket:

BUCKET=<YOUR_BUCKET>

gsutil mb gs://$BUCKET/

Set permissions for Velero

If you run Google Kubernetes Engine (GKE), make sure that your current IAM user is a cluster-admin. This role is required to create RBAC objects. See the GKE documentation for more information.

Option 1: Set permissions with a Service Account

To integrate Velero with GCP, create a Velero-specific Service Account:

View your current config settings:
```
gcloud config list
```
Store the project value from the results in the environment variable $PROJECT_ID.
```
PROJECT_ID=$(gcloud config get-value project)
```
Create a service account:
```
gcloud iam service-accounts create velero \
    --display-name "Velero service account"
```
If you'll be using Velero to backup multiple clusters with multiple GCS buckets, it may be desirable to create a unique username per cluster rather than the default velero.

Then list all accounts and find the velero account you just created:
```
gcloud iam service-accounts list
```
Set the $SERVICE_ACCOUNT_EMAIL variable to match its email value.
```
SERVICE_ACCOUNT_EMAIL=$(gcloud iam service-accounts list \
  --filter="displayName:Velero service account" \
  --format 'value(email)')
```

Attach policies to give velero the necessary permissions to function:

ROLE_PERMISSIONS=(
    compute.disks.get
    compute.disks.create
    compute.disks.createSnapshot
    compute.snapshots.get
    compute.snapshots.create
    compute.snapshots.useReadOnly
    compute.snapshots.delete
    compute.zones.get
)

gcloud iam roles create velero.server \
    --project $PROJECT_ID \
    --title "Velero Server" \
    --permissions "$(IFS=","; echo "${ROLE_PERMISSIONS[*]}")"

gcloud projects add-iam-policy-binding $PROJECT_ID \
    --member serviceAccount:$SERVICE_ACCOUNT_EMAIL \
    --role projects/$PROJECT_ID/roles/velero.server

gsutil iam ch serviceAccount:$SERVICE_ACCOUNT_EMAIL:objectAdmin gs://${BUCKET}

Create a service account key, specifying an output file (credentials-velero) in your local directory:

gcloud iam service-accounts keys create credentials-velero \
    --iam-account $SERVICE_ACCOUNT_EMAIL

Option 2: Set permissions with using Workload Identity (Optional)

If you are running Velero on a GKE cluster with workload identity enabled, you may want to bind Velero's Kubernetes service account to a GCP service account with the appropriate permissions instead of providing the key file during installation.

To do this, you must grant the GCP service account(the one you created in Step 3) the 'iam.serviceAccounts.signBlob' role. This is so that Velero's Kubernetes service account can create signed urls for the GCP bucket.

Next, add an IAM policy binding to grant Velero's Kubernetes service account access to your created GCP service account.

gcloud iam service-accounts add-iam-policy-binding \
    --role roles/iam.workloadIdentityUser \
    --member serviceAccount:[PROJECT_ID].svc.id.goog[velero/velero] \
    [GSA_NAME]@[PROJECT_ID].iam.gserviceaccount.com

For more information on configuring workload identity on GKE, look at the official GCP documentation for more details.

Install and start Velero

Download Velero

Install Velero, including all prerequisites, into the cluster and start the deployment. This will create a namespace called velero, and place a deployment named velero in it.

If using a Service Account:

velero install \
    --provider gcp \
    --plugins velero/velero-plugin-for-gcp:v1.1.0 \
    --bucket $BUCKET \
    --secret-file ./credentials-velero

If using Workload Identity:

You must add a service account annotation to the Kubernetes service account so that it will know which GCP service account to use. You can do this during installation with --sa-annotations. Use the flag --no-secret so that Velero will know not to look for a key file. You must also add the GCP service account name in --backup-location-config.

velero install \
    --provider gcp \
    --plugins velero/velero-plugin-for-gcp:v1.1.0 \
    --bucket $BUCKET \
    --no-secret \
    --sa-annotations iam.gke.io/gcp-service-account=[GSA_NAME]@[PROJECT_ID].iam.gserviceaccount.com \
    --backup-location-config serviceAccount=[GSA_NAME]@[PROJECT_ID].iam.gserviceaccount.com \

Additionally, you can specify --use-restic to enable restic support, and --wait to wait for the deployment to be ready.

(Optional) Specify additional configurable parameters for the --backup-location-config flag.

(Optional) Specify additional configurable parameters for the --snapshot-location-config flag.

(Optional) Customize the Velero installation further to meet your needs.

For more complex installation needs, use either the Helm chart, or add --dry-run -o yaml options for generating the YAML representation for the installation.

pantelis-karamolegkos/velero-plugin-for-gcp