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fix kubelet localStorageCapacityIsolation option #15336

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merged 1 commit into from
Nov 14, 2022
Merged

fix kubelet localStorageCapacityIsolation option #15336

merged 1 commit into from
Nov 14, 2022

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prezha
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@prezha prezha commented Nov 9, 2022 •
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fixes: #14728
fixes: #15099 (btrfs + k8s 1.25.2 + docker)
fixes: #15050 (btrfs + k8s 1.25.0 + docker)

it might help with #14819 (btrfs + docker, but k8s version is not shared: issue was reported on 20th Aug, so it, in theory, could be k8s v1.25.0-beta.0, but minikube is v1.26.1 shipped with DefaultKubernetesVersion = "v1.24.3")

i don't think i ever had issues with btrfs + docker + k8s/minikube and also, official OverlayFS and Docker Performance claims that:

In certain circumstances, overlay2 may perform better than btrfs as well. However, ...

but i know some users reported problems earlier, so, in case of such a combination, this pr should automatically:

  • enable LocalStorageCapacityIsolation as feature flag for k8s before v1.25.0-beta.0 and
  • enable localStorageCapacityIsolation as config option for k8s v1.25.0-beta.0 and newer

should they wish, users will also have the option to override this by passing eg, --extra-config="kubelet.localStorageCapacityIsolation=true" (which is default) for k8s >= v1.25.0-beta.0 (last example below demonstrates that case)

before

$ docker exec -ti docker /bin/bash
root@docker:/# journalctl -f

...
Nov 09 01:31:37 docker systemd[1]: kubelet.service: Main process exited, code=exited, status=1/FAILURE
Nov 09 01:31:37 docker systemd[1]: kubelet.service: Failed with result 'exit-code'.
Nov 09 01:31:38 docker systemd[1]: kubelet.service: Scheduled restart job, restart counter is at 3802.
Nov 09 01:31:38 docker systemd[1]: Stopped kubelet: The Kubernetes Node Agent.
Nov 09 01:31:38 docker systemd[1]: Started kubelet: The Kubernetes Node Agent.
Nov 09 01:31:38 docker kubelet[76607]: Flag --container-runtime has been deprecated, will be removed in 1.27 as the only valid value is 'remote'
Nov 09 01:31:38 docker kubelet[76607]: Flag --feature-gates has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.
Nov 09 01:31:38 docker kubelet[76607]: Flag --runtime-request-timeout has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.
Nov 09 01:31:38 docker kubelet[76607]: E1109 01:31:38.711920   76607 run.go:74] "command failed" err="failed to set feature gates from initial flags-based config: cannot set feature gate LocalStorageCapacityIsolation to false, feature is locked to true"
Nov 09 01:31:38 docker systemd[1]: kubelet.service: Main process exited, code=exited, status=1/FAILURE
Nov 09 01:31:38 docker systemd[1]: kubelet.service: Failed with result 'exit-code'.
...

after

$ time minikube start --driver=docker --kubernetes-version=1.25.3 -p btrfs-docker-k8s1.25.3

😄  [btrfs-docker-k8s1.25.3] minikube v1.28.0 on Opensuse-Tumbleweed
✨  Using the docker driver based on user configuration
❗  docker is currently using the btrfs storage driver, consider switching to overlay2 for better performance
📌  Using Docker driver with root privileges
👍  Starting control plane node btrfs-docker-k8s1.25.3 in cluster btrfs-docker-k8s1.25.3
🚜  Pulling base image ...
🔥  Creating docker container (CPUs=2, Memory=15900MB) ...
🐳  Preparing Kubernetes v1.25.3 on Docker 20.10.20 ...
    ▪ kubelet.localStorageCapacityIsolation=false
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔎  Verifying Kubernetes components...
    ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
🌟  Enabled addons: storage-provisioner, default-storageclass
🏄  Done! kubectl is now configured to use "btrfs-docker-k8s1.25.3" cluster and "default" namespace by default

real    0m31.322s
user    0m2.170s
sys     0m1.091s

$ docker exec -ti btrfs-docker-k8s1.25.3 cat /var/lib/kubelet/config.yaml | grep -A1 "kind: KubeletConfiguration"

kind: KubeletConfiguration
localStorageCapacityIsolation: false

$ docker exec -ti btrfs-docker-k8s1.25.3 cat /etc/systemd/system/kubelet.service.d/10-kubeadm.conf | grep -i "localStorageCapacityIsolation"

(null)

$ time minikube start --driver=docker --kubernetes-version=1.24.7 -p btrfs-docker-k8s1.24.7

😄  [btrfs-docker-k8s1.24.7] minikube v1.28.0 on Opensuse-Tumbleweed
✨  Using the docker driver based on user configuration
❗  docker is currently using the btrfs storage driver, consider switching to overlay2 for better performance
📌  Using Docker driver with root privileges
👍  Starting control plane node btrfs-docker-k8s1.24.7 in cluster btrfs-docker-k8s1.24.7
🚜  Pulling base image ...
🔥  Creating docker container (CPUs=2, Memory=15900MB) ...
🐳  Preparing Kubernetes v1.24.7 on Docker 20.10.20 ...
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔎  Verifying Kubernetes components...
    ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
🌟  Enabled addons: storage-provisioner, default-storageclass
🏄  Done! kubectl is now configured to use "btrfs-docker-k8s1.24.7" cluster and "default" namespace by default

real    0m28.820s
user    0m2.220s
sys     0m1.144s

$ docker exec -ti btrfs-docker-k8s1.24.7 cat /var/lib/kubelet/config.yaml | grep -A1 "kind: KubeletConfiguration"

kind: KubeletConfiguration
logging:

$ docker exec -ti btrfs-docker-k8s1.24.7 cat /etc/systemd/system/kubelet.service.d/10-kubeadm.conf | grep -i "localStorageCapacityIsolation"

ExecStart=/var/lib/minikube/binaries/v1.24.7/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --config=/var/lib/kubelet/config.yaml --container-runtime=remote --container-runtime-endpoint=/var/run/cri-dockerd.sock --feature-gates=LocalStorageCapacityIsolation=false --hostname-override=btrfs-docker-k8s1.24.7 --image-service-endpoint=/var/run/cri-dockerd.sock --kubeconfig=/etc/kubernetes/kubelet.conf --node-ip=192.168.58.2 --runtime-request-timeout=15m

$ time minikube start --driver=docker --kubernetes-version=1.25.3 -p btrfs-docker-k8s1.25.3-ec --extra-config="kubelet.localStorageCapacityIsolation=true"

😄  [btrfs-docker-k8s1.25.3-ec] minikube v1.28.0 on Opensuse-Tumbleweed
✨  Using the docker driver based on user configuration
❗  docker is currently using the btrfs storage driver, consider switching to overlay2 for better performance
📌  Using Docker driver with root privileges
👍  Starting control plane node btrfs-docker-k8s1.25.3-ec in cluster btrfs-docker-k8s1.25.3-ec
🚜  Pulling base image ...
🔥  Creating docker container (CPUs=2, Memory=15900MB) ...
🐳  Preparing Kubernetes v1.25.3 on Docker 20.10.20 ...
    ▪ kubelet.localStorageCapacityIsolation=true
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔎  Verifying Kubernetes components...
    ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
🌟  Enabled addons: default-storageclass, storage-provisioner
🏄  Done! kubectl is now configured to use "btrfs-docker-k8s1.25.3-ec" cluster and "default" namespace by default

real    0m29.488s
user    0m2.293s
sys     0m1.169s

$ docker exec -ti btrfs-docker-k8s1.25.3-ec cat /var/lib/kubelet/config.yaml | grep -A1 "kind: KubeletConfiguration"

kind: KubeletConfiguration
localStorageCapacityIsolation: true

$ docker exec -ti btrfs-docker-k8s1.25.3-ec cat /etc/systemd/system/kubelet.service.d/10-kubeadm.conf | grep -i "localStorageCapacityIsolation"

(null)

$ minikube profile list

|---------------------------|-----------|---------|--------------|------|---------|---------|-------|--------|
|          Profile          | VM Driver | Runtime |      IP      | Port | Version | Status  | Nodes | Active |
|---------------------------|-----------|---------|--------------|------|---------|---------|-------|--------|
| btrfs-docker-k8s1.24.7    | docker    | docker  | 192.168.58.2 | 8443 | v1.24.7 | Running |     1 |        |
| btrfs-docker-k8s1.25.3    | docker    | docker  | 192.168.49.2 | 8443 | v1.25.3 | Running |     1 |        |
| btrfs-docker-k8s1.25.3-ec | docker    | docker  | 192.168.67.2 | 8443 | v1.25.3 | Running |     1 |        |
|---------------------------|-----------|---------|--------------|------|---------|---------|-------|--------|

@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Nov 9, 2022
@k8s-ci-robot k8s-ci-robot added approved Indicates a PR has been approved by an approver from all required OWNERS files. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Nov 9, 2022
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medyagh commented Nov 11, 2022

/ok-to-test

@k8s-ci-robot k8s-ci-robot added the ok-to-test Indicates a non-member PR verified by an org member that is safe to test. label Nov 11, 2022
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kvm2 driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 15336) |
+----------------+----------+---------------------+
| minikube start | 54.3s    | 54.2s               |
| enable ingress | 28.1s    | 27.0s               |
+----------------+----------+---------------------+

Times for minikube start: 54.4s 54.5s 54.6s 54.1s 53.8s
Times for minikube (PR 15336) start: 55.9s 53.3s 53.3s 54.2s 54.3s

Times for minikube ingress: 29.1s 25.6s 29.6s 29.7s 26.6s
Times for minikube (PR 15336) ingress: 27.1s 28.1s 30.6s 25.2s 24.1s

docker driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 15336) |
+----------------+----------+---------------------+
| minikube start | 25.5s    | 26.9s               |
| enable ingress | 23.0s    | 21.8s               |
+----------------+----------+---------------------+

Times for minikube start: 24.5s 25.9s 25.9s 25.7s 25.6s
Times for minikube (PR 15336) start: 26.8s 26.0s 27.8s 25.3s 28.6s

Times for minikube ingress: 20.9s 25.4s 25.4s 20.9s 22.4s
Times for minikube (PR 15336) ingress: 21.5s 21.9s 21.9s 21.5s 21.9s

docker driver with containerd runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 15336) |
+----------------+----------+---------------------+
| minikube start | 22.2s    | 24.9s               |
| enable ingress | 27.3s    | 27.2s               |
+----------------+----------+---------------------+

Times for minikube start: 21.1s 21.8s 22.6s 21.2s 24.5s
Times for minikube (PR 15336) start: 36.0s 22.5s 21.8s 22.0s 22.3s

Times for minikube ingress: 27.4s 26.9s 27.5s 26.9s 27.4s
Times for minikube (PR 15336) ingress: 27.4s 26.9s 27.4s 26.9s 27.4s

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These are the flake rates of all failed tests.

Environment Failed Tests Flake Rate (%)
Hyper-V_Windows TestNetworkPlugins/group/bridge/Start (gopogh) 17.22 (chart)
Hyper-V_Windows TestNetworkPlugins/group/kubenet/Start (gopogh) 22.52 (chart)
Docker_macOS TestMultiNode/serial/RestartKeepsNodes (gopogh) 41.67 (chart)
Docker_Windows TestNetworkPlugins/group/enable-default-cni/DNS (gopogh) 42.28 (chart)
Docker_Windows TestStartStop/group/newest-cni/serial/Pause (gopogh) 53.02 (chart)
Docker_Windows TestNetworkPlugins/group/bridge/DNS (gopogh) 64.19 (chart)
Docker_Linux_containerd TestNetworkPlugins/group/enable-default-cni/DNS (gopogh) 78.12 (chart)
Docker_Linux_containerd TestNetworkPlugins/group/bridge/DNS (gopogh) 80.00 (chart)
Docker_Linux TestNetworkPlugins/group/calico/Start (gopogh) 83.66 (chart)
Docker_Linux TestNetworkPlugins/group/false/DNS (gopogh) 84.97 (chart)
Hyper-V_Windows TestNoKubernetes/serial/StartWithStopK8s (gopogh) 98.96 (chart)
Docker_Linux_containerd TestNetworkPlugins/group/calico/Start (gopogh) 99.17 (chart)
Docker_Linux_containerd TestKubernetesUpgrade (gopogh) 100.00 (chart)
Docker_Linux_containerd TestPreload (gopogh) 100.00 (chart)
Docker_Linux TestNetworkPlugins/group/kubenet/HairPin (gopogh) 100.00 (chart)
Docker_macOS TestIngressAddonLegacy/serial/ValidateIngressAddonActivation (gopogh) 100.00 (chart)
Docker_macOS TestIngressAddonLegacy/serial/ValidateIngressAddons (gopogh) 100.00 (chart)
Docker_macOS TestIngressAddonLegacy/serial/ValidateIngressDNSAddonActivation (gopogh) 100.00 (chart)
Docker_macOS TestIngressAddonLegacy/StartLegacyK8sCluster (gopogh) 100.00 (chart)
Docker_macOS TestKubernetesUpgrade (gopogh) 100.00 (chart)
Docker_macOS TestMissingContainerUpgrade (gopogh) 100.00 (chart)
Docker_macOS TestNetworkPlugins/group/kubenet/HairPin (gopogh) 100.00 (chart)
Docker_macOS TestRunningBinaryUpgrade (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/AddonExistsAfterStop (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/DeployApp (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/EnableAddonWhileActive (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/FirstStart (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/SecondStart (gopogh) 100.00 (chart)
Docker_macOS TestStartStop/group/old-k8s-version/serial/UserAppExistsAfterStop (gopogh) 100.00 (chart)
Docker_macOS TestStoppedBinaryUpgrade/Upgrade (gopogh) 100.00 (chart)
More tests... Continued...

Too many tests failed - See test logs for more details.

To see the flake rates of all tests by environment, click here.

medyagh
medyagh approved these changes Nov 14, 2022
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@prezha looks good, thanks for the fix :) and good to see your contribution again

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: medyagh, prezha

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@medyagh medyagh merged commit ccb569f into kubernetes:master Nov 14, 2022
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prezha commented Nov 27, 2022

@prezha looks good, thanks for the fix :) and good to see your contribution again

my pleasure, @medyagh ! :)

@afbjorklund afbjorklund mentioned this pull request Jan 2, 2023
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@medyagh medyagh medyagh approved these changes

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