NGF: Use consistent installation instructions for cert manager

content/ngf/install/manifests/open-source-experimental.md

@@ -28,7 +28,6 @@ To complete this guide, you will need the following pre-requisites:
 
 - [A supported Kubernetes version]({{< ref "/ngf/overview/technical-specifications.md" >}})
 - A functional Kubernetes cluster
-- [cert-manager](https://cert-manager.io/docs/installation/)
 
 ## Install the Gateway API resources
 
@@ -40,6 +39,10 @@ You should also create the _nginx-gateway_ namespace, which is used by the Manif
 kubectl create namespace nginx-gateway
 ```
 
+## Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
+
 ## Add certificates for secure authentication
 
 {{< include "/ngf/installation/manifests/secure-certificates.md" >}}

content/ngf/install/manifests/open-source.md

@@ -28,7 +28,6 @@ To complete this guide, you will need the following pre-requisites:
 
 - [A supported Kubernetes version]({{< ref "/ngf/overview/technical-specifications.md" >}})
 - A functional Kubernetes cluster
-- [cert-manager](https://cert-manager.io/docs/installation/)
 
 ## Install the Gateway API resources
 
@@ -40,6 +39,10 @@ You should also create the _nginx-gateway_ namespace, which is used by the Manif
 kubectl create namespace nginx-gateway
 ```
 
+## Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
+
 ## Add certificates for secure authentication
 
 {{< include "/ngf/installation/manifests/secure-certificates.md" >}}

content/ngf/install/manifests/plus-experimental.md

@@ -28,7 +28,6 @@ To complete this guide, you will need the following pre-requisites:
 - An active NGINX Plus subscription (Purchased or trial)
 - [A supported Kubernetes version]({{< ref "/ngf/overview/technical-specifications.md" >}})
 - A functional Kubernetes cluster
-- [cert-manager](https://cert-manager.io/docs/installation/)
 
 ## Download your JSON web token
 
@@ -85,6 +84,10 @@ nplus-license                Opaque                           1      21s
 
 {{< include "/ngf/installation/manifests/api-resources-experimental.md" >}}
 
+## Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
+
 ## Add certificates for secure authentication
 
 {{< include "/ngf/installation/manifests/secure-certificates.md" >}}

content/ngf/install/manifests/plus.md

@@ -28,7 +28,6 @@ To complete this guide, you will need the following pre-requisites:
 - An active NGINX Plus subscription (Purchased or trial)
 - [A supported Kubernetes version]({{< ref "/ngf/overview/technical-specifications.md" >}})
 - A functional Kubernetes cluster
-- [cert-manager](https://cert-manager.io/docs/installation/)
 
 ## Download your JSON web token
 
@@ -85,6 +84,10 @@ nplus-license                Opaque                           1      21s
 
 {{< include "/ngf/installation/manifests/api-resources.md" >}}
 
+## Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
+
 ## Add certificates for secure authentication
 
 {{< include "/ngf/installation/manifests/secure-certificates.md" >}}

content/ngf/traffic-security/jwt-authentication.md

@@ -31,7 +31,6 @@ NGINX Gateway Fabric supports two JWKS source types, set using the `source` fiel
 ## Before you begin
 
 - [Install]({{< ref "/ngf/install/" >}}) NGINX Gateway Fabric with NGINX Plus.
-- [Install cert-manager](https://cert-manager.io/docs/installation/) in your cluster.
 
 ## Common setup
 
@@ -395,6 +394,10 @@ Request ID: c7eb0509303de1c160cb7e7d2ac1d99f
 
 Use remote JWT authentication when your identity provider (IdP) exposes a JWKS endpoint. NGINX Plus fetches the JWKS from the URI at runtime using an internal subrequest, so keys are always up to date without requiring a Secret or NGINX reload.
 
+### Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
+
 ### Generate certificates
 
 {{< include "/ngf/keycloak-certs.md" >}}

content/ngf/traffic-security/oidc-authentication.md

@@ -39,7 +39,10 @@ You can consolidate multiple keys in a single Secret or use separate Secrets for
 To follow this guide, you need the following:
 
 - [Install]({{< ref "/ngf/install/" >}}) NGINX Gateway Fabric with NGINX Plus.
-- [Install cert-manager](https://cert-manager.io/docs/installation/) in your cluster.
+
+### Install cert-manager
+
+{{< include "ngf/deploy-cert-manager.md" >}}
 
 ### Generate certificates