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Deprecate old OS versions #11696

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Deprecate old OS versions #11696

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160 changes: 74 additions & 86 deletions docs/operations/images.md
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Expand Up @@ -36,18 +36,18 @@ The following table provides the support status for various distros with regards
| Distro | Experimental | Stable | Deprecated | Removed |
| ------------ | -----------: | -----: | ---------: | ------: |
| [Amazon Linux 2](#amazon-linux-2) | 1.10 | 1.18 | - | - |
| [CentOS 7](#centos-7) | - | 1.5 | - | - |
| [CentOS 8](#centos-8) | 1.15 | - | - | - |
| [CoreOS](#coreos) | 1.6 | 1.9 | 1.17 | 1.18 |
| [Debian 8](#debian-8-jessie) | - | 1.5 | 1.17 | 1.18 |
| [Debian 9](#debian-9-stretch) | 1.8 | 1.10 | - | - |
| [CentOS 7](#centos-7) | - | 1.5 | 1.21 | - |
| [CentOS 8](#centos-8) | 1.15 | - | 1.21 | - |
| CoreOS | 1.6 | 1.9 | 1.17 | 1.18 |
| Debian 8 | - | 1.5 | 1.17 | 1.18 |
| [Debian 9](#debian-9-stretch) | 1.8 | 1.10 | 1.21 | - |
| [Debian 10](#debian-10-buster) | 1.13 | 1.17 | - | - |
| [Flatcar](#flatcar) | 1.15.1 | 1.17 | - | - |
| [Kope.io](#kopeio) | - | - | 1.18 | - |
| [RHEL 7](#rhel-7) | - | 1.5 | - | - |
| [RHEL 7](#rhel-7) | - | 1.5 | 1.21 | - |
| [RHEL 8](#rhel-8) | 1.15 | 1.18 | - | - |
| [Ubuntu 16.04](#ubuntu-1604-xenial) | 1.5 | 1.10 | 1.17 | 1.20 |
| [Ubuntu 18.04](#ubuntu-1804-bionic) | 1.10 | 1.16 | - | - |
| Ubuntu 16.04 | 1.5 | 1.10 | 1.17 | 1.20 |
| [Ubuntu 18.04](#ubuntu-1804-bionic) | 1.10 | 1.16 | 1.21 | - |
| [Ubuntu 20.04](#ubuntu-2004-focal) | 1.16.2 | 1.18 | - | - |

## Supported Distros
Expand All @@ -67,55 +67,6 @@ aws ec2 describe-images --region us-east-1 --output table \
--filters "Name=name,Values=amzn2-ami-hvm-2*-x86_64-gp2"
```

### CentOS 7

CentOS 7 is based on Kernel version **3.10** which has a considerable number of known bugs that affect it and may be noticed in production clusters:

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

The minimum supported version is **7.4**. Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 125523088429 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=CentOS 7.*x86_64"
```

### CentOS 8

CentOS 8 is based on Kernel version **4.18** which fixes some of the bugs present in RHEL/CentOS 7 and effects are less visible.

One notable change is the addition of `iptables` NFT, which is the only iptables backend available. This may not be supported by some CNI plugins and should be used with care.

Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 125523088429 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=CentOS 8.*x86_64"
```

### Debian 9 (Stretch)

Debian 9 is based on Kernel version **4.9** which has a number of known bugs that affect it and which may be noticed with larger clusters:

This release is **EOL**, which means that the Debian Security Team no longer handles security fixes. That is now the responsibility/purview of the LTS team, which is a group of volunteers who are paid by donations to Debian LTS.

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 379101102735 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=debian-stretch-hvm-x86_64-gp2-*"
```

### Debian 10 (Buster)

Debian 10 is based on Kernel version **4.19** which fixes some of the bugs present in Debian 9 and effects are less visible.
Expand Down Expand Up @@ -156,87 +107,124 @@ aws ec2 describe-images --region us-east-1 --output table \
--filters "Name=name,Values=Flatcar-stable-*-hvm"
```

### RHEL 7
### RHEL 8

RHEL 7 is based on Kernel version **3.10** which has a considerable number of known bugs that affect it and may be noticed in production clusters:
RHEL 8 is based on Kernel version **4.18** which fixes some of the bugs present in RHEL/CentOS 7 and effects are less visible.

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)
One notable change is the addition of `iptables` NFT, which is the only iptables backend available. This may not be supported by some CNI plugins and should be used with care.

The minimum supported version is **7.4**. Available images can be listed using:
Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 309956199498 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=RHEL-7.*x86_64*"
--filters "Name=name,Values=RHEL-8.*x86_64*"
```

### RHEL 8

RHEL 8 is based on Kernel version **4.18** which fixes some of the bugs present in RHEL/CentOS 7 and effects are less visible.
### Ubuntu 20.04 (Focal)

One notable change is the addition of `iptables` NFT, which is the only iptables backend available. This may not be supported by some CNI plugins and should be used with care.
Ubuntu 20.04 is based on Kernel version **5.4** which fixes all the known major Kernel bugs.

Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 309956199498 \
--owners 099720109477 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=RHEL-8.*x86_64*"
--filters "Name=name,Values=ubuntu/images/hvm-ssd/ubuntu-focal-20.04-amd64-*"
```

### Ubuntu 18.04 (Bionic)
## Deprecated Distros

Ubuntu 18.04 is based on Kernel version **4.15** which has a number of known bugs that affect it and which may be noticed with larger clusters:
### CentOS 7

CentOS 7 is based on Kernel version **3.10** which has a considerable number of known bugs that affect it and may be noticed in production clusters:

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

Available images can be listed using:
The minimum supported version is **7.4**. Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 099720109477 \
--owners 125523088429 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-*"
--filters "Name=name,Values=CentOS 7.*x86_64"
```

### Ubuntu 20.04 (Focal)
### CentOS 8

Ubuntu 20.04 is based on Kernel version **5.4** which fixes all the known major Kernel bugs.
CentOS 8 has announced its End Of Life is December 31, 2021.

CentOS 8 is based on Kernel version **4.18** which fixes some of the bugs present in RHEL/CentOS 7 and effects are less visible.

One notable change is the addition of `iptables` NFT, which is the only iptables backend available. This may not be supported by some CNI plugins and should be used with care.

Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 099720109477 \
--owners 125523088429 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=ubuntu/images/hvm-ssd/ubuntu-focal-20.04-amd64-*"
--filters "Name=name,Values=CentOS 8.*x86_64"
```

## Deprecated Distros
### Debian 9 (Stretch)

### CoreOS
Debian 9 is based on Kernel version **4.9** which has a number of known bugs that affect it and which may be noticed with larger clusters:

Support for CoreOS was removed in kOps 1.18.
This release is **EOL**, which means that the Debian Security Team no longer handles security fixes. That is now the responsibility/purview of the LTS team, which is a group of volunteers who are paid by donations to Debian LTS.

You should consider using [Flatcar](#flatcar) as a replacement.
* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

### Debian 8 (Jessie)
Available images can be listed using:

Support for Debian 8 (Jessie) was removed in kOps 1.18.
```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 379101102735 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=debian-stretch-hvm-x86_64-gp2-*"
```

### Kope.io

Support for _kope.io_ images is deprecated. These images were the default until Kubernetes 1.18, when they were replaced by the [official Ubuntu 20.04](#ubuntu-2004-focal) images.

The _kope.io_ images were based on [Debian 9 (Stretch)](#debian-9-stretch) and had all packages required by kOps pre-installed. Other than that, the changes to the official Debian images were [minimal](https://github.com/kubernetes-sigs/image-builder/blob/master/images/kube-deploy/imagebuilder/templates/1.18-stretch.yml#L174-L198).

### Ubuntu 16.04 (Xenial)
### RHEL 7

RHEL 7 is based on Kernel version **3.10** which has a considerable number of known bugs that affect it and may be noticed in production clusters:

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

The minimum supported version is **7.4**. Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 309956199498 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=RHEL-7.*x86_64*"
```

### Ubuntu 18.04 (Bionic)

Ubuntu 18.04 is based on Kernel version **4.15** which has a number of known bugs that affect it and which may be noticed with larger clusters:

* [kubernetes/kubernetes#56903](https://github.com/kubernetes/kubernetes/issues/56903)
* [kubernetes/kubernetes#67577](https://github.com/kubernetes/kubernetes/issues/67577)

Support for Ubuntu 16.04 (Xenial) is deprecated and will be removed in kOps 1.20.
Available images can be listed using:

```bash
aws ec2 describe-images --region us-east-1 --output table \
--owners 099720109477 \
--query "sort_by(Images, &CreationDate)[*].[CreationDate,Name,ImageId]" \
--filters "Name=name,Values=ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-*"
```

## Owner aliases

Expand Down
12 changes: 11 additions & 1 deletion docs/releases/1.21-NOTES.md
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Expand Up @@ -44,10 +44,20 @@ See the [warm pool](https://kops.sigs.k8s.io/instance_groups/#warmpool-aws-only)

# Deprecations

* Support for Kubernetes versions 1.15 and 1.16 are deprecated and will be removed in kOps 1.22.
* Support for Kubernetes versions 1.15 and 1.16 is deprecated and will be removed in kOps 1.22.

* Support for Kubernetes version 1.17 is deprecated and will be removed in kOps 1.23.

* Support for CentOS 7 is deprecated and will be removed in future versions of kOps.

* Support for CentOS 8 is deprecated and will be removed in future versions of kOps.

* Support for Debian 9 (Stretch) is deprecated and will be removed in future versions of kOps.

* Support for RHEL 7 is deprecated and will be removed in future versions of kOps.

* Support for Ubuntu 18.04 (Bionic) is deprecated and will be removed in future versions of kOps.

* The legacy location for downloads `s3://https://kubeupv2.s3.amazonaws.com/kops/` has been deprecated and will not be used as of kOps 1.22. The new canonical downloads location is `https://artifacts.k8s.io/binaries/kops/`.

* The [manifest based metrics server addon](https://github.com/kubernetes/kops/tree/master/addons/metrics-server) has been deprecated in favour of a configurable addon.
Expand Down
10 changes: 10 additions & 0 deletions docs/releases/1.22-NOTES.md
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Expand Up @@ -22,6 +22,16 @@ This is a document to gather the release notes prior to the release.

* Support for Kubernetes version 1.18 is deprecated and will be removed in kOps 1.24.

* Support for CentOS 7 is deprecated and will be removed in future versions of kOps.

* Support for CentOS 8 is deprecated and will be removed in future versions of kOps.

* Support for Debian 9 (Stretch) is deprecated and will be removed in future versions of kOps.

* Support for RHEL 7 is deprecated and will be removed in future versions of kOps.

* Support for Ubuntu 18.04 (Bionic) is deprecated and will be removed in future versions of kOps.

* The [manifest based metrics server addon](https://github.com/kubernetes/kops/tree/master/addons/metrics-server) has been deprecated in favour of a configurable addon.

* The [manifest based cluster autoscaler addon](https://github.com/kubernetes/kops/tree/master/addons/cluster-autoscaler) has been deprecated in favour of a configurable addon.
Expand Down