OSSM-4815: updated files

Author: rh-tokeefe

modules/ossm-configuring-istio-ha-autoscaling.adoc

@@ -17,48 +17,52 @@ Configure the {istio} control plane in High Availability (HA) mode to prevent a
 
 .Procedure
 
-. Modify the {istio} custom resource by defining the autoscaleMin and autoscaleMax parameters.
+. Obtain the name of the {istio} resource by running the following command:
 +
-.Example configuration
-[source,yaml,subs="attributes,verbatim"]
+[source,terminal]
 ----
-apiVersion: sailoperator.io/v1
-kind: Istio
-metadata:
-  name: default
-spec:
-  namespace: istio-system
-  values:
-    pilot:
-      autoscaleMin: 2 # <1>
-      autoscaleMax: 5 # <2>  
+$ oc get istio -n istio-system
 ----
-<1> Defines the minimum number of {istio} control plane replicas that always run. 
-<2> Defines the maximum number of {istio} control plane replicas, allowing for scaling based on load. To support HA, there must be at least two replicas.
++
+.Example output
+[source,terminal]
+----
+NAME      REVISIONS   READY   IN USE   ACTIVE REVISION   STATUS    VERSION   AGE
+default   1           1       0        default           Healthy   v1.24.6   24m
+----
++
+The name of the {istio} resource is `default`.
 
-. Apply the configuration changes by running the following command:
+. Update the {istio} custom resource by adding the `autoscaleMin` and `autoscaleMax` parameters by running the following command:
 +
 [source,terminal]
 ----
-$ oc apply -f <filename>.yaml
+$ oc patch istio default -n istio-system --type merge -p '
+spec:
+  values:
+    pilot:
+      autoscaleMin: 2 <1>
+      autoscaleMax: 5 <2>
+'
 ----
+<1> Defines the minimum number of {istio} control plane replicas that always run. 
+<2> Defines the maximum number of {istio} control plane replicas, allowing for scaling based on load. To support HA, there must be at least two replicas.
 
 .Verification
 
-Verify the status of the {Istio} control pods by running the following command:
+. Verify the status of the {Istio} control pods by running the following command:
 +
 [source,terminal]
 ----
 $ oc get pods -n istio-system -l app=istiod
 ----
 +
 .Example output
-+
 [source,terminal]
 ----
 NAME                      READY   STATUS    RESTARTS   AGE
 istiod-7c7b6564c9-nwhsg   1/1     Running   0          70s
 istiod-7c7b6564c9-xkmsl   1/1     Running   0          85s
 ----
 +
-Two `istiod` pods are running, which indicates HA was successfully configured.
+Two `istiod` pods are running, which indicates HA was successfully configured.

modules/ossm-configuring-istio-ha-replicacount.adoc

@@ -17,43 +17,47 @@ Configure the {istio} control plane in High Availability (HA) mode to prevent a
 
 .Procedure
 
-. Modify the {istio} custom resource by defining the autoscaleMin and autoscaleMax parameters.
+. Obtain the name of the {istio} resource by running the following command:
 +
-.Example configuration
-[source,yaml,subs="attributes,verbatim"]
+[source,terminal]
 ----
-apiVersion: sailoperator.io/v1
-kind: Istio
-metadata:
-  name: default
-spec:
-  namespace: istio-system
-  values:
-    pilot:
-      autoscaleEnabled: false # <1> 
-      replicaCount: 2 # <2>
+$ oc get istio -n istio-sytem
 ----
-<1> Disables autoscaling and ensures that the number of replicas remains fixed.
-<2> Defines the number of {istio} control plane replicas. To support HA, there must be at least two replicas.
++
+.Example output
+[source,terminal]
+----
+NAME      REVISIONS   READY   IN USE   ACTIVE REVISION   STATUS    VERSION   AGE
+default   1           1       0        default           Healthy   v1.24.6   24m
+----
++
+The name of the {istio} resource is `default`.
 
-. Apply the configuration changes by running the following command:
+. Update the {istio} custom resource by adding the `autoscaleEnabled` and `replicaCount` parameters by running the following command:
 +
 [source,terminal]
 ----
-$ oc apply -f <filename>.yaml
+$ oc patch istio default -n istio-system --type merge -p '
+spec:
+  values:
+    pilot:
+      autoscaleEnabled: false <1> 
+      replicaCount: 2 <2>
+'
 ----
+<1> Disables autoscaling and ensures that the number of replicas remains fixed.
+<2> Defines the number of {istio} control plane replicas. To support HA, there must be at least two replicas.
 
 .Verification
 
-Verify the status of the {Istio} control pods by running the following command:
+. Verify the status of the {Istio} control pods by running the following command:
 +
 [source,terminal]
 ----
 $ oc get pods -n istio-system -l app=istiod
 ----
 +
 .Example output
-+
 [source,terminal]
 ----
 NAME                      READY   STATUS    RESTARTS   AGE