Last week, the Velero team announced the availability of release candidate (RC) version 1.0.0. I was eager to get my hands on it and try it out. Since it is RC (and not GA), I thought I would just deploy a fresh environment for testing. The guidance from the Velero team is to test it out in your non-critical environments! On a number of Velero github sites, the links to download the binaries do not appear to be working, plus some of the install guidance is a little sparse. Anyhow, after some trial and error, I decided it might be useful to document the steps I went through to fully deploy a 1.0.0 RC version.
First of all, the site to get the 1.0.0-rc.1 tar-ball is here – https://github.com/heptio/velero/releases/tag/v1.0.0-rc.1. From here, you can download the appropriate tar-ball, and this will provide you with the velero client binary.
cormac@pks-cli:~/Velero_v1.0rc$ tar zxvf velero-v1.0.0-rc.1-linux-amd64.tar.gz velero-v1.0.0-rc.1-linux-amd64/LICENSE velero-v1.0.0-rc.1-linux-amd64/examples/README.md velero-v1.0.0-rc.1-linux-amd64/examples/minio velero-v1.0.0-rc.1-linux-amd64/examples/minio/00-minio-deployment.yaml velero-v1.0.0-rc.1-linux-amd64/examples/nginx-app velero-v1.0.0-rc.1-linux-amd64/examples/nginx-app/README.md velero-v1.0.0-rc.1-linux-amd64/examples/nginx-app/base.yaml velero-v1.0.0-rc.1-linux-amd64/examples/nginx-app/with-pv.yaml velero-v1.0.0-rc.1-linux-amd64/velero
From here, you can retrieve the client side binary ‘velero’. Simpy copy this to your local PATH, e.g. /usr/local/bin. You are now good to go from a client perspective.
When you examine the extracted RC tar-ball, you will see that some files are noticeably missing when compared to Velero v0.11. The files are the following:
config/common/00-prereqs.yaml config/minio/00-minio-deployment.yaml config/minio/05-backupstoragelocation.yaml config/minio/20-deployment.yaml config/minio/30-restic-daemonset.yaml
Now, in my original Velero post, I modified config/minio/00-minio-deployment.yaml to give me a decent sized Minio S3 for my on-prem, on-vSphere backups. You can find the details in this post here. Therefore, I was very interested in keeping this configuration. Therefore, I simply copied these YAML files from my v0.11 deployment folder to my v1.0.0-rc.1 deployment folder. There were only 2 additional changes needed to the files, and these changes are simply to use the latest Velero server and restic images. The files that needed updating were 20-deployment.yaml and 30-restic-deployment.yaml.
If everything is working correctly after you have deployed Velero (applied the new common and minio folders), you should get the following new RC version numbers.
cormac@pks-cli:~$ velero version Client: Version:v1.0.0-rc.1 Git commit: d05f8e53d8ecbdb939d5d3a3d24da7868619ec3d Server: Version:v1.0.0-rc.1
It would also be worth making sure that the velero and restic pods, as well as the minio pod, has started successfully. But as mentioned, this should be no different to v0.11. It should look something like this. Again, refer to my earlier blog post if you want full setup instructions.
cormac@pks-cli:~$ kubectl get pod -n velero NAME READY STATUS RESTARTS AGE minio-67fc7ffcdf-r8r4g 1/1 Running 0 4m51s minio-setup-hj24t 0/1 Completed 1 4m51s restic-bjdp2 1/1 Running 0 4m50s restic-cj8sx 1/1 Running 0 4m50s restic-cljrk 1/1 Running 0 4m50s restic-q4xdn 1/1 Running 0 4m50s velero-6756989966-dmhrc 1/1 Running 0 4m50s
Backup and Restore
Now for the real test. Let’s do a backup of some application, delete the original, and see if we can restore it once more with this RC version of Velero. I’m going to use my tried and trusted Cassandra instance, running in its own namespace also called Cassandra. I’ve already populated it with some simple data. The idea is to take a backup with Velero, delete the namespace where Cassandra exists, then restore it once again with Velero. My Cassandra instance has a single PVC/PV, and since this is running on vSphere and PKS, we will be using the restic plugin for snapshot management that comes with Velero. I have also added the correct annotations to get the PV contents includes in the backup. Once I have completed the backup, and deleted the namespace, I will initiate a restore. I will then verify that my database contents are still intact.
Here are the complete steps. They should be quite easy to follow.
cormac@pks-cli:~$ kubectl -n cassandra annotate pod/cassandra-0 backup.velero.io/backup-volumes=cassandra-data --overwrite pod/cassandra-0 annotated cormac@pks-cli:~$ velero backup create cassandra Backup request "cassandra" submitted successfully. Run `velero backup describe cassandra` or `velero backup logs cassandra` for more detail cormac@pks-cli:~$ velero backup describe cassandra --exclude-namespaces default,kube-public,kube-system,pks-system,velero Name: cassandra Namespace: velero Labels: velero.io/storage-location=default Annotations: <none> Phase: Completed Namespaces: Included: * Excluded: default, kube-public, kube-system, pks-system, velero Resources: Included: * Excluded: <none> Cluster-scoped: auto Label selector: <none> Storage Location: default Snapshot PVs: auto TTL: 720h0m0s Hooks: <none> Backup Format Version: 1 Started: 2019-05-13 09:02:01 +0100 IST Completed: 2019-05-13 09:02:06 +0100 IST Expiration: 2019-06-12 09:02:01 +0100 IST Persistent Volumes: <none included> Restic Backups (specify --details for more information): Completed: 1
cormac@pks-cli:~$ velero backup get NAME STATUS CREATED EXPIRES STORAGE LOCATION SELECTOR cassandra Completed 2019-05-13 09:02:01 +0100 IST 29d default <none> cormac@pks-cli:~$ velero backup logs cassandra | grep restic time="2019-05-13T08:02:01Z" level=info msg="Skipping persistent volume\ snapshot because volume has already been backed up with restic."\ backup=velero/cassandra group=v1 logSource="pkg/backup/item_backupper.go:390"\ name=pvc-71eedeae-7328-11e9-b153-005056a29b20 namespace=cassandra\ persistentVolume=pvc-71eedeae-7328-11e9-b153-005056a29b20 resource=pods cormac@pks-cli:~$ kubectl delete ns cassandra namespace "cassandra" deleted cormac@pks-cli:~$ kubectl get ns NAME STATUS AGE default Active 15d kube-public Active 15d kube-system Active 15d pks-system Active 15d velero Active 21m cormac@pks-cli:~$ velero restore create cassandra-restore --from-backup cassandra Restore request "cassandra-restore" submitted successfully. Run `velero restore describe cassandra-restore` or `velero restore logs cassandra-restore` for more details. cormac@pks-cli:~$ velero restore describe cassandra-restore Name: cassandra-restore Namespace: velero Labels: <none> Annotations: <none> Phase: Completed Backup: cassandra Namespaces: Included: * Excluded: <none> Resources: Included: * Excluded: nodes, events, events.events.k8s.io, backups.velero.io, restores.velero.io, resticrepositories.velero.io Cluster-scoped: auto Namespace mappings: <none> Label selector: <none> Restore PVs: auto Restic Restores (specify --details for more information): Completed: 1 cormac@pks-cli:~$ velero restore get NAME BACKUP STATUS WARNINGS ERRORS CREATED SELECTOR cassandra-restore cassandra Completed 0 0 2019-05-13 09:13:34 +0100 IST <none> cormac@pks-cli:~$ kubectl get ns NAME STATUS AGE cassandra Active 51s default Active 15d kube-public Active 15d kube-system Active 15d pks-system Active 15d velero Active 22m cormac@pks-cli:~$ kubectl get pod -n cassandra NAME READY STATUS RESTARTS AGE cassandra-0 0/1 Running 0 49s cormac@pks-cli:~$ kubectl get pvc -n cassandra NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE cassandra-data-cassandra-0 Bound pvc-71eedeae-7328-11e9-b153-005056a29b20 1Gi RWO cass-sc 65s cormac@pks-cli:~$ kubectl get pv NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE pvc-71eedeae-7328-11e9-b153-005056a29b20 1Gi RWO Delete Bound cassandra/cassandra-data-cassandra-0 cass-sc 72s pvc-ba7ad6a0-7325-11e9-b153-005056a29b20 10Gi RWO Delete Bound velero/minio-pv-claim-1 minio-sc 19m cormac@pks-cli:~$ kubectl exec -it cassandra-0 -n cassandra -- nodetool status Datacenter: DC1-K8Demo ====================== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack UN 10.200.87.32 112.04 KiB 32 100.0% 581614a6-eb8a-4498-936a-427ec6d2897e Rack1-K8Demo cormac@pks-cli:~$ kubectl exec -it cassandra-0 -n cassandra -- cqlsh Connected to K8Demo at 127.0.0.1:9042. [cqlsh 5.0.1 | Cassandra 3.9 | CQL spec 3.4.2 | Native protocol v4] Use HELP for help. cqlsh> use demodb; cqlsh:demodb> select * from emp; emp_id | emp_city | emp_name | emp_phone | emp_sal --------+----------+----------+-----------+--------- 100 | Cork | Cormac | 999 | 1000000 (1 rows) cqlsh:demodb>
Looks good to me. I successfully backed up my Casandra app, deleted the namespace on which it was running (which removed any PODs and PVs), then successfully restored it from Velero, and validated that the data is still in place. Looks like RC is working for us.