feat: add support for Kubernetes 1.21.0-beta.1

[mboersma]

Reason for Change:

See https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md#changelog-since-v1210-beta0

Issue Fixed:

Credit Where Due:

Does this change contain code from or inspired by another project?

• No
• Yes

Requirements:

• Kubernetes artifacts built and pushed by Azure Pipelines
• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[codecov]

Codecov Report

Merging #4321 (4d4541f) into master (75d6b07) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4321   +/-   ##
=======================================
  Coverage   72.07%   72.07%           
=======================================
  Files         141      141           
  Lines       21640    21640           
=======================================
  Hits        15596    15596           
  Misses       5093     5093           
  Partials      951      951           

Impacted Files	Coverage Δ
pkg/api/common/versions.go	96.37% <ø> (ø)

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[jackfrancis]

/lgtm

[jackfrancis]

@marosset @jsturtevant 1.21.0-beta.1 + containerd looks to have a regression compared to beta.0:

Warning  Failed     30m   kubelet            Error: failed to create containerd task: hcsshim::CreateComputeSystem validate-bing: The directory name is invalid.
(extra info: {"Owner":"containerd-shim-runhcs-v1.exe","SchemaVersion":{"Major":2,"Minor":1},"Container":{"GuestOs":{"HostName":"validate-dns-windows-tdhkg"},"Storage":{"Layers":[{"Id":"fd99f5a1-d5be-57d1-ac12-5f04d4e788e3","Path":"C:\\ProgramData\\containerd\\root\\io.containerd.snapshotter.v1.windows\\snapshots\\2"},{"Id":"65ed1907-894d-50ff-bdcb-cc63fb515966","Path":"C:\\ProgramData\\containerd\\root\\io.containerd.snapshotter.v1.windows\\snapshots\\1"}],"Path":"\\\\?\\Volume{5959079b-7046-47ee-aae5-5428de968dcf}\\"},"MappedDirectories":[{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\containers\\validate-bing\\527f3363","ContainerPath":"c:\\dev\\termination-log"},{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\volumes\\kubernetes.io~projected\\kube-api-access-wbwdx","ContainerPath":"c:\\var\\run\\secrets\\kubernetes.io\\serviceaccount","ReadOnly":true},{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\etc-hosts","...
  Normal   Pulled   30m  kubelet  Container image "mcr.microsoft.com/windows/servercore:ltsc2019" already present on machine
  Normal   Created  30m  kubelet  Created container validate-google
  Warning  Failed   30m  kubelet  Error: failed to create containerd task: hcsshim::CreateComputeSystem validate-google: The directory name is invalid.
(extra info: {"Owner":"containerd-shim-runhcs-v1.exe","SchemaVersion":{"Major":2,"Minor":1},"Container":{"GuestOs":{"HostName":"validate-dns-windows-tdhkg"},"Storage":{"Layers":[{"Id":"fd99f5a1-d5be-57d1-ac12-5f04d4e788e3","Path":"C:\\ProgramData\\containerd\\root\\io.containerd.snapshotter.v1.windows\\snapshots\\2"},{"Id":"65ed1907-894d-50ff-bdcb-cc63fb515966","Path":"C:\\ProgramData\\containerd\\root\\io.containerd.snapshotter.v1.windows\\snapshots\\1"}],"Path":"\\\\?\\Volume{5959079b-7046-47ee-aae5-5428de968dcf}\\"},"MappedDirectories":[{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\containers\\validate-google\\a59acf60","ContainerPath":"c:\\dev\\termination-log"},{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\volumes\\kubernetes.io~projected\\kube-api-access-wbwdx","ContainerPath":"c:\\var\\run\\secrets\\kubernetes.io\\serviceaccount","ReadOnly":true},{"HostPath":"c:\\var\\lib\\kubelet\\pods\\9c9dff15-eff4-4c54-9b84-4ab498a541bc\\etc-hosts"...

Any thoughts?

[marosset]

aks-engine/test/e2e/test_cluster_configs/containerd.json

Line 54 in b24cda7

"windowsSku": "2019-datacenter-core-smalldisk-containerd-2005",

needs to be updated to 2019-datacenter-core-smalldisk-containerd-2103

Do you want to include that change in this PR or should I open another one?

[jackfrancis]

@marosset I'll make the change here, yay for the clear resolution!

[marosset]

We enabled some functionality in k/k for containerd that that requires the Windows nodes have at least the Oct 2020 security patches. The image being used by the e2e tests here has May 2020 security patches :(

[marosset]

/lgtm

[marosset]

Oops sorry this needs to be 2019-datacenter-core-ctrd-2103

[marosset]

Same as above (2019-datacenter-core-ctrd-2103)

[jackfrancis]

/lgtm

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