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* Don't need to define a specific dated image. Managed instance groups do not delete instances when new images are released to a channel
30 lines
1.2 KiB
Markdown
30 lines
1.2 KiB
Markdown
# Container Linux Update Operator
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The [Container Linux Update Operator](https://github.com/coreos/container-linux-update-operator) (i.e. CLUO) coordinates reboots of auto-updating Container Linux nodes so that one node reboots at a time and nodes are drained before reboot. CLUO enables the auto-update behavior Container Linux clusters are known for, but does so in a Kubernetes native way.
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## Create
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Create the `update-operator` deployment and `update-agent` DaemonSet.
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```sh
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kubectl apply -f addons/cluo -R
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```
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## Usage
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`update-agent` runs as a DaemonSet and annotates a node when `update-engine.service` indicates an update has been installed and a reboot is needed. It also adds additional labels and annotations to nodes.
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```
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$ kubectl get nodes --show-labels
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...
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container-linux-update.v1.coreos.com/group=stable
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container-linux-update.v1.coreos.com/version=1632.3.0
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```
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`update-operator` ensures one node reboots at a time and that pods are drained prior to reboot.
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!!! note ""
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CLUO replaces `locksmithd` reboot coordination. The `update_engine` systemd unit on hosts still performs the Container Linux update check, download, and install to the inactive partition.
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