[Release-1.27] - Snapshot retention does not work with etcd-s3-folder about k3s

[aganesh-suse]

Validated on release-1.27 branch with version v1.27.15-rc3+k3s1

Environment Details

Infrastructure

• Cloud
• Hosted

Node(s) CPU architecture, OS, and Version:

$ cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.2 LTS"

$ uname -m
x86_64

Cluster Configuration:

HA: 3 server/ 1 agent

Config.yaml:

token: xxxx
cluster-init: true
write-kubeconfig-mode: "0644"
node-external-ip: 1.1.1.1
node-label:
- k3s-upgrade=server

etcd-snapshot-retention: 2
etcd-snapshot-schedule-cron: "* * * * *"
etcd-s3: true
etcd-s3-access-key: <access-key>
etcd-s3-secret-key: <secret-key>
etcd-s3-bucket: <s3-bucket>
etcd-s3-folder: <s3-folder>
etcd-s3-region: <region>

debug: true

Testing Steps

1. Copy config.yaml

$ sudo mkdir -p /etc/rancher/k3s && sudo cp config.yaml /etc/rancher/k3s

2. Install k3s

curl -sfL https://get.k3s.io | sudo INSTALL_K3S_VERSION='v1.27.15-rc3+k3s1' sh -s - server

3. Verify Cluster Status:

kubectl get nodes -o wide
kubectl get pods -A

4. Perform:

$ sudo k3s etcd-snapshot prune
$ sudo k3s etcd-snapshot list 

pruned snapshot should not be listed after being deleted.

Replication Results:

• k3s version used for replication:

$ k3s -v
k3s version v1.27.14+k3s1 (b0b34e4d)
go version go1.21.9

 $ sudo /usr/local/bin/k3s etcd-snapshot prune 
time="2024-06-21T18:27:45Z" level=warning msg="Unknown flag --etcd-snapshot-schedule-cron found in config.yaml, skipping\n"
time="2024-06-21T18:27:45Z" level=warning msg="Unknown flag --cluster-init found in config.yaml, skipping\n"
time="2024-06-21T18:27:45Z" level=warning msg="Unknown flag --write-kubeconfig-mode found in config.yaml, skipping\n"
time="2024-06-21T18:27:45Z" level=warning msg="Unknown flag --node-external-ip found in config.yaml, skipping\n"
time="2024-06-21T18:27:45Z" level=warning msg="Unknown flag --node-label found in config.yaml, skipping\n"
time="2024-06-21T18:27:45Z" level=warning msg="Cluster CA certificate is not trusted by the host CA bundle, but the token does not include a CA hash. Use the full token from the server's node-token file to enable Cluster CA validation."
time="2024-06-21T18:27:46Z" level=info msg="Snapshot on-demand-ip-172-31-30-182-1718994392 deleted."
time="2024-06-21T18:27:46Z" level=info msg="Snapshot <s3-folder>/on-demand-ip-172-31-30-182-1718994392 deleted."

 $ sudo /usr/local/bin/k3s etcd-snapshot list 2>/dev/null On SERVER1: 18.188.91.198
Name                                      Location                                                                                         Size    Created
etcd-snapshot-ip-172-31-30-182-1718994001 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994001 770080  2024-06-21T18:20:01Z
etcd-snapshot-ip-172-31-30-182-1718994062 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994062 3358752 2024-06-21T18:21:02Z
etcd-snapshot-ip-172-31-30-182-1718994125 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994125 3813408 2024-06-21T18:22:05Z
etcd-snapshot-ip-172-31-30-182-1718994181 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994181 4214816 2024-06-21T18:23:01Z
etcd-snapshot-ip-172-31-30-182-1718994242 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994242 4423712 2024-06-21T18:24:02Z
etcd-snapshot-ip-172-31-30-182-1718994302 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994302 5296160 2024-06-21T18:25:02Z
etcd-snapshot-ip-172-31-30-182-1718994363 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994363 5521440 2024-06-21T18:26:03Z
etcd-snapshot-ip-172-31-30-182-1718994363 file:///var/lib/rancher/k3s/server/db/snapshots/etcd-snapshot-ip-172-31-30-182-1718994363        5521440 2024-06-21T18:26:03Z
on-demand-ip-172-31-30-182-1718994392     s3://<s3-bucket>/<s3-folder>/on-demand-ip-172-31-30-182-1718994392     5619744 2024-06-21T18:26:32Z
on-demand-ip-172-31-30-182-1718994399     s3://<s3-bucket>/<s3-folder>/on-demand-ip-172-31-30-182-1718994399     5664800 2024-06-21T18:26:39Z
on-demand-ip-172-31-30-182-1718994399     file:///var/lib/rancher/k3s/server/db/snapshots/on-demand-ip-172-31-30-182-1718994399            5664800 2024-06-21T18:26:39Z
on-demand-ip-172-31-30-182-1718994408     s3://<s3-bucket>/<s3-folder>/on-demand-ip-172-31-30-182-1718994408     5713952 2024-06-21T18:26:48Z
on-demand-ip-172-31-30-182-1718994408     file:///var/lib/rancher/k3s/server/db/snapshots/on-demand-ip-172-31-30-182-1718994408            5713952 2024-06-21T18:26:48Z
etcd-snapshot-ip-172-31-30-182-1718994421 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-30-182-1718994421 5791776 2024-06-21T18:27:01Z
etcd-snapshot-ip-172-31-30-182-1718994421 file:///var/lib/rancher/k3s/server/db/snapshots/etcd-snapshot-ip-172-31-30-182-1718994421        5791776 2024-06-21T18:27:01Z

on-demand-ip-172-31-30-182-1718994392 is still listed above - after it was supposed to be deleted.

Validation Results:

• k3s version used for validation:

$ k3s -v
k3s version v1.27.15-rc3+k3s1 (3ced503a)
go version go1.21.11

 $ sudo /usr/local/bin/k3s etcd-snapshot prune 
time="2024-06-21T18:27:37Z" level=warning msg="Unknown flag --etcd-snapshot-schedule-cron found in config.yaml, skipping\n"
time="2024-06-21T18:27:37Z" level=warning msg="Unknown flag --cluster-init found in config.yaml, skipping\n"
time="2024-06-21T18:27:37Z" level=warning msg="Unknown flag --write-kubeconfig-mode found in config.yaml, skipping\n"
time="2024-06-21T18:27:37Z" level=warning msg="Unknown flag --node-external-ip found in config.yaml, skipping\n"
time="2024-06-21T18:27:37Z" level=warning msg="Unknown flag --node-label found in config.yaml, skipping\n"
time="2024-06-21T18:27:37Z" level=warning msg="Cluster CA certificate is not trusted by the host CA bundle, but the token does not include a CA hash. Use the full token from the server's node-token file to enable Cluster CA validation."
time="2024-06-21T18:27:38Z" level=info msg="Snapshot on-demand-ip-172-31-21-205-1718994386 deleted."
time="2024-06-21T18:27:38Z" level=info msg="Snapshot on-demand-ip-172-31-21-205-1718994386 deleted."

$ sudo /usr/local/bin/k3s etcd-snapshot list
Name                                      Location                                                                                            Size    Created
etcd-snapshot-ip-172-31-21-205-1718994364 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-21-205-1718994364 5492768 2024-06-21T18:26:04Z
etcd-snapshot-ip-172-31-21-205-1718994364 file:///var/lib/rancher/k3s/server/db/snapshots/etcd-snapshot-ip-172-31-21-205-1718994364           5492768 2024-06-21T18:26:04Z
on-demand-ip-172-31-21-205-1718994394     s3://<s3-bucket>/<s3-folder>/on-demand-ip-172-31-21-205-1718994394     5627936 2024-06-21T18:26:34Z
on-demand-ip-172-31-21-205-1718994394     file:///var/lib/rancher/k3s/server/db/snapshots/on-demand-ip-172-31-21-205-1718994394               5627936 2024-06-21T18:26:34Z
on-demand-ip-172-31-21-205-1718994402     s3://<s3-bucket>/<s3-folder>/on-demand-ip-172-31-21-205-1718994402     5697568 2024-06-21T18:26:42Z
on-demand-ip-172-31-21-205-1718994402     file:///var/lib/rancher/k3s/server/db/snapshots/on-demand-ip-172-31-21-205-1718994402               5697568 2024-06-21T18:26:42Z
etcd-snapshot-ip-172-31-21-205-1718994422 s3://<s3-bucket>/<s3-folder>/etcd-snapshot-ip-172-31-21-205-1718994422 5763104 2024-06-21T18:27:02Z
etcd-snapshot-ip-172-31-21-205-1718994422 file:///var/lib/rancher/k3s/server/db/snapshots/etcd-snapshot-ip-172-31-21-205-1718994422           5763104 2024-06-21T18:27:02Z

on-demand-ip-172-31-21-205-1718994386 is not on the list post delete.