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zirain merged 1 commit into from
Aug 8, 2025
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docs: ClusterTrustBundle Support in BackendTLSPolicy #6714

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38 changes: 31 additions & 7 deletions site/content/en/latest/tasks/security/backend-tls.md
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Original file line number Diff line number Diff line change
Expand Up @@ -59,12 +59,35 @@ Store the cert/key in a Secret:
kubectl create secret tls example-cert --key=www.example.com.key --cert=www.example.com.crt
```

Store the CA Cert in another Secret:
Store the CA Cert in different ways:

{{< tabpane text=true >}}
{{% tab header="ConfigMap" %}}

```shell
kubectl create configmap example-ca --from-file=ca.crt
```

{{% /tab %}}

{{% tab header="ClusterTrustBundle" %}}

Save and apply the following resource to your cluster:

```shell
apiVersion: certificates.k8s.io/v1beta1
kind: ClusterTrustBundle
metadata:
name: example-ca
spec:
trustBundle: |
[content from ca.crt]
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@arkodg arkodg Aug 6, 2025

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is this valid ? will this command work ?

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@zirain zirain Aug 7, 2025

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it need users to handle the indentation correctly, I didn't figure out a easy way.

```

{{% /tab %}}

{{< /tabpane >}}

## Setup TLS on the backend

Patch the existing quickstart backend to enable TLS. The patch will mount the TLS certificate secret into the backend as volume.
Expand Down Expand Up @@ -159,7 +182,7 @@ Note: SectionName is an optional field that specifies the name of the port in th
If the target is a [Backend] resource, the `sectionName` field should be set to the port number of the backend.

{{< tabpane text=true >}}
{{% tab header="Apply from stdin" %}}
{{% tab header="ConfigMap" %}}
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@arkodg arkodg Aug 6, 2025

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curious why this changed

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@zirain zirain Aug 7, 2025

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we need to support both ConfigMap/ClusterTrustBundle.

TBH, that apply from file seems useless.


```shell
cat <<EOF | kubectl apply -f -
Expand All @@ -184,11 +207,11 @@ EOF
```

{{% /tab %}}
{{% tab header="Apply from file" %}}
Save and apply the following resource to your cluster:

```yaml
---
{{% tab header="ClusterTrustBundle" %}}

```shell
cat <<EOF | kubectl apply -f -
apiVersion: gateway.networking.k8s.io/v1alpha3
kind: BackendTLSPolicy
metadata:
Expand All @@ -204,8 +227,9 @@ spec:
caCertificateRefs:
- name: example-ca
group: ''
kind: ConfigMap
kind: ClusterTrustBundle
hostname: www.example.com
EOF
```

{{% /tab %}}
Expand Down