Merge pull request #58605 from opayne1/OSDOCS-5675

OSDOCS#5675: Adds etcd configuration options

Author: opayne1

microshift_support/microshift-etcd.adoc

@@ -12,4 +12,5 @@ toc::[]
 :FeatureName: MicroShift
 include::snippets/microshift-tech-preview-snip.adoc[leveloffset=+1]
 
-include::modules/microshift-observe-debug-etcd-server.adoc[leveloffset=+1]
+include::modules/microshift-observe-debug-etcd-server.adoc[leveloffset=+1]
+include::modules/microshift-configuration.adoc[leveloffset=+1]

modules/microshift-configuration.adoc

@@ -0,0 +1,36 @@
+// Module included in the following assemblies:
+//
+//* microshift_support/microshift-etcd.adoc
+
+:_content-type: PROCEDURE
+[id="microshift-configuration_{context}"]
+= Configuring the `memoryLimitMB` value to set parameters for the {product-title} etcd server
+
+By default, etcd will use as much memory as necessary to handle the load on the system. In some memory constrained systems, it might be necessary to limit the amount of memory etcd is allowed to use at a given time.
+
+.Procedure
+
+* Edit the `/etc/microshift/config.yaml` file to set the `memoryLimitMB` value.
++
+[source,yaml]
+----
+etcd:
+  memoryLimitMB: 128
+----
++
+[NOTE]
+====
+128mb is the minimum permissible value for memoryLimitMB on {product-title}. Values close to the minimum value are more likely to impact etcd performance. The lower the limit, the longer it will take to respond to queries. In addition, if the limit is low or the etcd usage is high, queries will time request out.
+====
+
+.Verification
+
+. After modifying the `memoryLimitMB` value in `/etc/microshift/config.yaml`, restart {product-title} by running the following command:
+----
+$ sudo systemctl restart microshift
+----
+
+. Verify the new `memoryLimitMB` value is in use by running the following command:
+----
+$ systemctl status microshift
+----