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MGMT-16509: Documentation for OSImageCACertRef in AgentServiceConfig #5960

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MGMT-16509: Documentation for OSImageCACertRef in AgentServiceConfig #5960

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58 changes: 58 additions & 0 deletions docs/operator.md
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Expand Up @@ -242,6 +242,64 @@ Add the annotation to the AgentServiceConfig:
oc annotate --overwrite AgentServiceConfig agent unsupported.agent-install.openshift.io/assisted-image-service-skip-verify-tls=true
```

### Custom CA for Assisted Image Service OS Image Download

It is possible to specify a CA to be used when downloading OS images. This should be used when OS images are being served from HTTPS servers where the CA would not typically be known to assisted installer.

Start by creating a secret with a TLS certificate as the content, the key "tls.crt" should contain the certificate(s)
The ConfigMap should be installed in the same namespace as the infrastructure-operator (ie. `multicluster-engine` or `assisted-installer` depending on how the infrastucture operator was deployed).

```
oc -n multicluster-engine create configmap image-service-additional-ca --from-file=/root/tls.crt
```

Then in the `AgentServiceConfig`, this ConfigMap should be referenced, in `OSImageCACertRef`
The CA bundle defined in the ConfigMap referred to by `OSImageCACertRef` will then be used when pulling osImages.

``` bash
cat <<EOF | kubectl apply -f -
apiVersion: agent-install.openshift.io/v1beta1
kind: AgentServiceConfig
metadata:
name: agent
spec:
OSImageCACertRef:
name: image-service-additional-ca
osImages:
- openshiftVersion: "4.14"
version: "414.92.202310170514-0"
url: "https://some-os-image-server.io/rhcos-4.14.0-rc.0-x86_64-live.x86_64.iso"
cpuArchitecture: "x86_64"
- openshiftVersion: "4.15"
version: "414.92.202310170514-0"
url: "https://some-os-image-server.io/rhcos-4.15.0-rc.0-x86_64-live.x86_64.iso"
cpuArchitecture: "x86_64"
databaseStorage:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
filesystemStorage:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 20Gi
imageStorage:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
mirrorRegistryRef:
name: mirror-registry-config-map
EOF
```




### Mirror Registry Configuration

A ConfigMap can be used to configure assisted service to create installations using mirrored content. The ConfigMap contains two keys:
Expand Down