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Co-authored-by: John Gardiner Myers <jgmyers@proofpoint.com>
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Ciprian Hacman 2020-08-13 08:32:13 +03:00 committed by Ciprian Hacman
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docs/operations/images.md
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# Images
Starting Kubernetes 1.18, the default images used by _kops_ are the **[official Ubuntu 20.04](#ubuntu-2004-focal)** images.
As of Kubernetes 1.18 the default images used by _kops_ are the **[official Ubuntu 20.04](#ubuntu-2004-focal)** images.
You can choose a different image for an instance group by editing it with `kops edit ig nodes`. You should see an `image` field in one of the following formats:
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* `<owner>/<name>` specifies an AMI by its owner's account ID and name properties
* `<alias>/<name>` specifies an AMI by its [owner's alias](#owner-aliases) and name properties
Using the AMI id is precise, but ids vary by region. It is often more convenient to use the `<owner/alias>/<name>`, if equivalent images have been copied to various regions with the same name.
Using the AMI id is precise, but ids vary by region. It is often more convenient to use the `<owner/alias>/<name>` if equivalent images with the same name have been copied to other regions.
```yaml
image: ami-00579fbb15b954340
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### Debian 9 (Stretch)
Debian 9 is based on Kernel version **4.9** which has number of known bugs that affect it and may be noticed with larger clusters:
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.
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### Ubuntu 18.04 (Bionic)
Ubuntu 18.04 is based on Kernel version **4.15** which has number of known bugs that affect it and may be noticed with larger clusters:
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)
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### CoreOS
Support for CoreOS is deprecated and was removed in _kops_ 1.18.
Support for CoreOS was removed in _kops_ 1.18.
You should consider using [Flatcar](#flatcar) as a replacement.
### Debian 8 (Jessie)
Support for Debian 8 (Jessie) is deprecated and was removed in _kops_ 1.18.
Support for Debian 8 (Jessie) was removed in _kops_ 1.18.
### Kope.io