Merge master into dev-1.22 to keep in sync

content/en/docs/concepts/workloads/controllers/daemonset.md

@@ -230,6 +230,8 @@ storage servers).
 Use a Deployment for stateless services, like frontends, where scaling up and down the
 number of replicas and rolling out updates are more important than controlling exactly which host
 the Pod runs on.  Use a DaemonSet when it is important that a copy of a Pod always run on
-all or certain hosts, and when it needs to start before other Pods.
+all or certain hosts, if the DaemonSet provides node-level functionality that allows other Pods to run correctly on that particular node.
+
+For example, [network plugins](/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/) often include a component that runs as a DaemonSet. The DaemonSet component makes sure that the node where it's running has working cluster networking.
 
 

content/en/docs/concepts/workloads/pods/init-containers.md

@@ -291,7 +291,8 @@ Given the ordering and execution for init containers, the following rules
 for resource usage apply:
 
 * The highest of any particular resource request or limit defined on all init
-  containers is the *effective init request/limit*
+  containers is the *effective init request/limit*. If any resource has no
+  resource limit specified this is considered as the highest limit.
 * The Pod's *effective request/limit* for a resource is the higher of:
   * the sum of all app containers request/limit for a resource
   * the effective init request/limit for a resource

content/en/docs/concepts/workloads/pods/pod-lifecycle.md

@@ -379,7 +379,7 @@ An example flow:
    as terminating (a graceful shutdown duration has been set), the kubelet begins the local Pod
    shutdown process.
    1. If one of the Pod's containers has defined a `preStop`
-      [hook](/docs/concepts/containers/container-lifecycle-hooks/#hook-details), the kubelet
+      [hook](/docs/concepts/containers/container-lifecycle-hooks), the kubelet
       runs that hook inside of the container. If the `preStop` hook is still running after the
       grace period expires, the kubelet requests a small, one-off grace period extension of 2
       seconds.