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pkdone avatar pkdone commented on September 18, 2024

Hi, thanks for the notes. The scripts actually use the disks I explicitly create for the PVs/PVCs. What is actually redundant is the line "kubectl apply -f ../resources/gce-ssd-storageclass.yaml" in genrate.sh to craete a storage class. This is only needed if the Dynamic PVCs, but in my example I create the disks explicitly (partly to ensure XFS is used - may not be required anymore?). I've commented out that line with an explanation (I've left it in with a comment though as its a useful reference point for people to see). Both methods do result in persistent volume claims which are tolerant of recycling StatefulSet pods, I've just made it more explicit which method I'm using (Static PVs vs Dynamic PVs). See below which shows how the explicitly created disks via PVs are being used for the PVCs.. Thanks Paul

kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
data-volume-4g-1 4Gi RWO Retain Bound default/mongo-configdb-persistent-storage-claim-mongod-configdb-2 fast 2m
data-volume-4g-2 4Gi RWO Retain Bound default/mongo-configdb-persistent-storage-claim-mongod-configdb-0 fast 2m
data-volume-4g-3 4Gi RWO Retain Bound default/mongo-configdb-persistent-storage-claim-mongod-configdb-1 fast 2m
data-volume-8g-1 8Gi RWO Retain Bound default/mongo-shard1-persistent-storage-claim-mongod-shard1-0 fast 2m
data-volume-8g-2 8Gi RWO Retain Bound default/mongo-shard2-persistent-storage-claim-mongod-shard2-2 fast 2m
data-volume-8g-3 8Gi RWO Retain Bound default/mongo-shard2-persistent-storage-claim-mongod-shard2-0 fast 2m
data-volume-8g-4 8Gi RWO Retain Bound default/mongo-shard3-persistent-storage-claim-mongod-shard3-1 fast 2m
data-volume-8g-5 8Gi RWO Retain Bound default/mongo-shard1-persistent-storage-claim-mongod-shard1-1 fast 2m
data-volume-8g-6 8Gi RWO Retain Bound default/mongo-shard2-persistent-storage-claim-mongod-shard2-1 fast 2m
data-volume-8g-7 8Gi RWO Retain Bound default/mongo-shard3-persistent-storage-claim-mongod-shard3-2 fast 2m
data-volume-8g-8 8Gi RWO Retain Bound default/mongo-shard1-persistent-storage-claim-mongod-shard1-2 fast 2m
data-volume-8g-9 8Gi RWO Retain Bound default/mongo-shard3-persistent-storage-claim-mongod-shard3-0 fast 2m

from gke-mongodb-shards-demo.

marekaf avatar marekaf commented on September 18, 2024

what kubernetes version are you using?
because it works completely different for me..

root@vps:~/gke-mongodb-shards-demo/scripts# k get pv
NAME                                       CAPACITY   ACCESSMODES   RECLAIMPOLICY   STATUS      CLAIM                                                               REASON    AGE
data-volume-4g-1                           4Gi        RWO           Retain          Available                                                                                 3d
data-volume-4g-2                           4Gi        RWO           Retain          Available                                                                                 3d
data-volume-4g-3                           4Gi        RWO           Retain          Available                                                                                 3d
data-volume-50g-1                          50Gi       RWO           Retain          Available                                                                                 3d
data-volume-50g-2                          50Gi       RWO           Retain          Available                                                                                 3d
data-volume-50g-3                          50Gi       RWO           Retain          Available                                                                                 3d 
data-volume-50g-4                          50Gi       RWO           Retain          Available                                                                                 3d
data-volume-50g-5                          50Gi       RWO           Retain          Available                                                                                 3d
data-volume-50g-6                          50Gi       RWO           Retain          Available                                                                                 3d
pvc-4934d8ee-d5be-11e7-a4b9-42010a8401b3   4Gi        RWO           Delete          Bound       default/mongo-configdb-persistent-storage-claim-mongod-configdb-0             3d
pvc-49a57c43-d5be-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard1-persistent-storage-claim-mongod-shard1-0                 3d
pvc-501bc8b4-d5be-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard2-persistent-storage-claim-mongod-shard2-0                 3d
pvc-5600bd65-d5be-11e7-a4b9-42010a8401b3   4Gi        RWO           Delete          Bound       default/mongo-configdb-persistent-storage-claim-mongod-configdb-1             3d
pvc-56851c5b-d5be-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard3-persistent-storage-claim-mongod-shard3-0                 3d
pvc-5bc633d4-d5be-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard2-persistent-storage-claim-mongod-shard2-1                 3d
pvc-61dd56df-d5be-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard3-persistent-storage-claim-mongod-shard3-1                 3d
pvc-63215897-d5be-11e7-a4b9-42010a8401b3   4Gi        RWO           Delete          Bound       default/mongo-configdb-persistent-storage-claim-mongod-configdb-2             3d
pvc-87c17743-d60a-11e7-a4b9-42010a8401b3   50Gi       RWO           Delete          Bound       default/mongo-shard1-persistent-storage-claim-mongod-shard1-1                 3d

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pkdone avatar pkdone commented on September 18, 2024

I'm just using current GKE defaults.

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.2", GitCommit:"bdaeafa71f6c7c04636251031f93464384d54963", GitTreeState:"clean", BuildDate:"2017-10-24T19:48:57Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"7+", GitVersion:"v1.7.8-gke.0", GitCommit:"a7061d4b09b53ab4099e3b5ca3e80fb172e1b018", GitTreeState:"clean", BuildDate:"2017-10-10T18:48:45Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

$ gcloud container get-server-config
Fetching server config for europe-west1-b
defaultClusterVersion: 1.7.8-gke.0

Are you running the project on a Kubernetes platform that is not GKE?

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marekaf avatar marekaf commented on September 18, 2024 
# kubectl version
Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.2", GitCommit:"08e099554f3c31f6e6f07b448ab3ed78d0520507", GitTreeState:"clean", BuildDate:"2017-01-12T04:57:25Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"7+", GitVersion:"v1.7.8-gke.0", GitCommit:"a7061d4b09b53ab4099e3b5ca3e80fb172e1b018", GitTreeState:"clean", BuildDate:"2017-10-10T18:48:45Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

# gcloud container get-server-config
Fetching server config for europe-west1-d
defaultClusterVersion: 1.7.8-gke.0

could it be the client version?

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marekaf avatar marekaf commented on September 18, 2024

I upgraded my client kubectl version

Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.4", GitCommit:"9befc2b8928a9426501d3bf62f72849d5cbcd5a3", GitTreeState:"clean", BuildDate:"2017-11-20T05:28:34Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"7+", GitVersion:"v1.7.8-gke.0", GitCommit:"a7061d4b09b53ab4099e3b5ca3e80fb172e1b018", GitTreeState:"clean", BuildDate:"2017-10-10T18:48:45Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

and the persistentVolumes are created as intented.
We can close this issue now :) Thanks.

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pkdone avatar pkdone commented on September 18, 2024

Great, thanks for testing!

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