Rename PetSet to StatefulSet in docs and examples.

docs/design/indexed-job.md

@@ -481,7 +481,7 @@ The multiple substitution approach:
 for very large jobs, the work-queue style or another type of controller, such as
 map-reduce or spark, may be a better fit.)
 - Drawback: is a form of server-side templating, which we want in Kubernetes but
-have not fully designed (see the [PetSets proposal](https://github.com/kubernetes/kubernetes/pull/18016/files?short_path=61f4179#diff-61f41798f4bced6e42e45731c1494cee)).
+have not fully designed (see the [StatefulSets proposal](https://github.com/kubernetes/kubernetes/pull/18016/files?short_path=61f4179#diff-61f41798f4bced6e42e45731c1494cee)).
 
 The index-only approach:
 
@@ -874,24 +874,24 @@ admission time; it will need to understand indexes.
 previous container failures.
 - modify the job template, affecting all indexes.
 
-#### Comparison to PetSets
+#### Comparison to StatefulSets (previously named PetSets)
 
-The *Index substitution-only* option corresponds roughly to PetSet Proposal 1b.
-The `perCompletionArgs` approach is similar to PetSet Proposal 1e, but more
+The *Index substitution-only* option corresponds roughly to StatefulSet Proposal 1b.
+The `perCompletionArgs` approach is similar to StatefulSet Proposal 1e, but more
 restrictive and thus less verbose.
 
-It would be easier for users if Indexed Job and PetSet are similar where
-possible. However, PetSet differs in several key respects:
+It would be easier for users if Indexed Job and StatefulSet are similar where
+possible. However, StatefulSet differs in several key respects:
 
-- PetSet is for ones to tens of instances.  Indexed job should work with tens of
+- StatefulSet is for ones to tens of instances.  Indexed job should work with tens of
 thousands of instances.
-- When you have few instances, you may want to given them pet names. When you
-have many instances, you that many instances, integer indexes make more sense.
+- When you have few instances, you may want to give them names. When you have many instances,
+integer indexes make more sense.
 - When you have thousands of instances, storing the work-list in the JobSpec
-is verbose.  For PetSet, this is less of a problem.
-- PetSets (apparently) need to differ in more fields than indexed Jobs.
+is verbose.  For StatefulSet, this is less of a problem.
+- StatefulSets (apparently) need to differ in more fields than indexed Jobs.
 
-This differs from PetSet in that PetSet uses names and not indexes. PetSet is
+This differs from StatefulSet in that StatefulSet uses names and not indexes. StatefulSet is
 intended to support ones to tens of things.
 
 

docs/devel/updating-docs-for-feature-changes.md

@@ -11,7 +11,7 @@ Anyone making user facing changes to kubernetes.  This is especially important f
 ### When making Api changes
 
 *e.g. adding Deployments*
-* Always make sure docs for downstream effects are updated *(PetSet -> PVC, Deployment -> ReplicationController)*
+* Always make sure docs for downstream effects are updated *(StatefulSet -> PVC, Deployment -> ReplicationController)*
 * Add or update the corresponding *[Glossary](http://kubernetes.io/docs/reference/)* item
 * Verify the guides / walkthroughs do not require any changes:
   * **If your change will be recommended over the approaches shown in these guides, then they must be updated to reflect your change**

docs/proposals/image-provenance.md

@@ -165,7 +165,7 @@ due to a CVE that just came out (fictional scenario).  In this scenario:
   up and not scale down the old one.
 - an existing replicaSet will be unable to create Pods that replace ones which are terminated.  If this is due to
   slow loss of nodes, then there should be time to react before significant loss of capacity.
-- For non-replicated things (size 1 ReplicaSet, PetSet), a single node failure may disable it.
+- For non-replicated things (size 1 ReplicaSet, StatefulSet), a single node failure may disable it.
 - a node rolling update will eventually check for liveness of replacements, and would be throttled if
   in the case when the image was no longer allowed and so replacements could not be started.
 - rapid node restarts will cause existing pod objects to be restarted by kubelet.

docs/proposals/synchronous-garbage-collection.md

@@ -158,7 +158,7 @@ Finalizer breaks an assumption that many Kubernetes components have: a deletion
 
 **Replication controller manager**, **Job controller**, and **ReplicaSet controller** ignore pods in terminated phase, so pods with pending finalizers will not block these controllers.
 
-**PetSet controller** will be blocked by a pod with pending finalizers, so synchronous GC might slow down its progress.
+**StatefulSet controller** will be blocked by a pod with pending finalizers, so synchronous GC might slow down its progress.
 
 **kubectl**: synchronous GC can simplify the **kubectl delete** reapers. Let's take the `deployment reaper` as an example, since it's the most complicated one. Currently, the reaper finds all `RS` with matching labels, scales them down, polls until `RS.Status.Replica` reaches 0, deletes the `RS`es, and finally deletes the `deployment`. If using synchronous GC, `kubectl delete deployment` is as easy as sending a synchronous GC delete request for the deployment, and polls until the deployment is deleted from the key-value store.
 

docs/proposals/templates.md

@@ -11,7 +11,7 @@ There are two main motivators for Template functionality in Kubernetes:  Control
 Today the replication controller defines a PodTemplate which allows it to instantiate multiple pods with identical characteristics.
 This is useful but limited.  Stateful applications have a need to instantiate multiple instances of a more sophisticated topology
 than just a single pod (e.g. they also need Volume definitions).  A Template concept would allow a Controller to stamp out multiple
-instances of a given Template definition.  This capability would be immediately useful to the [PetSet](https://github.com/kubernetes/kubernetes/pull/18016) proposal.
+instances of a given Template definition.  This capability would be immediately useful to the [StatefulSet](https://github.com/kubernetes/kubernetes/pull/18016) proposal.
 
 Similarly the [Service Catalog proposal](https://github.com/kubernetes/kubernetes/pull/17543) could leverage template instantiation as a mechanism for claiming service instances.
 
@@ -47,7 +47,7 @@ values are appropriate for a deployer to tune or what the parameters control.
 * Providing a library of predefined application definitions that users can select from
 * Enabling the creation of user interfaces that can guide an application deployer through the deployment process with descriptive help about the configuration value decisions they are making, and useful default values where appropriate
 * Exporting a set of objects in a namespace as a template so the topology can be inspected/visualized or recreated in another environment
-* Controllers that need to instantiate multiple instances of identical objects (e.g. PetSets).
+* Controllers that need to instantiate multiple instances of identical objects (e.g. StatefulSets).
 
 
 ### Use cases for parameters within templates
@@ -65,7 +65,7 @@ values are appropriate for a deployer to tune or what the parameters control.
   a pod as a TLS cert).
 * Provide guidance to users for parameters such as default values, descriptions, and whether or not a particular parameter value
   is required or can be left blank.
-* Parameterize the replica count of a deployment or [PetSet](https://github.com/kubernetes/kubernetes/pull/18016)
+* Parameterize the replica count of a deployment or [StatefulSet](https://github.com/kubernetes/kubernetes/pull/18016)
 * Parameterize part of the labels and selector for a DaemonSet
 * Parameterize quota/limit values for a pod
 * Parameterize a secret value so a user can provide a custom password or other secret at deployment time

examples/cockroachdb/README.md

-# CockroachDB on Kubernetes as a PetSet
+# CockroachDB on Kubernetes as a StatefulSet
 
 This example deploys [CockroachDB](https://cockroachlabs.com) on Kubernetes as
-a PetSet. CockroachDB is a distributed, scalable NewSQL database. Please see
+a StatefulSet. CockroachDB is a distributed, scalable NewSQL database. Please see
 [the homepage](https://cockroachlabs.com) and the
 [documentation](https://www.cockroachlabs.com/docs/) for details.
 
 ## Limitations
 
-### PetSet limitations
+### StatefulSet limitations
 
-Standard PetSet limitations apply: There is currently no possibility to use
+Standard StatefulSet limitations apply: There is currently no possibility to use
 node-local storage (outside of single-node tests), and so there is likely
 a performance hit associated with running CockroachDB on some external storage.
 Note that CockroachDB already does replication and thus it is unnecessary to
 deploy it onto persistent volumes which already replicate internally.
 For this reason, high-performance use cases on a private Kubernetes cluster
-may want to consider a DaemonSet deployment until PetSets support node-local
+may want to consider a DaemonSet deployment until Stateful Sets support node-local
 storage (see #7562).
 
 ### Recovery after persistent storage failure
@@ -43,13 +43,13 @@ Follow the steps in [minikube.sh](minikube.sh) (or simply run that file).
 ## Testing in the cloud on GCE or AWS
 
 Once you have a Kubernetes cluster running, just run
-`kubectl create -f cockroachdb-petset.yaml` to create your cockroachdb cluster.
+`kubectl create -f cockroachdb-statefulset.yaml` to create your cockroachdb cluster.
 This works because GCE and AWS support dynamic volume provisioning by default,
 so persistent volumes will be created for the CockroachDB pods as needed.
 
 ## Accessing the database
 
-Along with our PetSet configuration, we expose a standard Kubernetes service
+Along with our StatefulSet configuration, we expose a standard Kubernetes service
 that offers a load-balanced virtual IP for clients to access the database
 with. In our example, we've called this service `cockroachdb-public`.
 
@@ -98,10 +98,10 @@ database and ensuring the other replicas have all data that was written.
 
 ## Scaling up or down
 
-Simply patch the PetSet by running
+Simply patch the Stateful Set by running
 
 ```shell
-kubectl patch petset cockroachdb -p '{"spec":{"replicas":4}}'
+kubectl patch statefulset cockroachdb -p '{"spec":{"replicas":4}}'
 ```
 
 Note that you may need to create a new persistent volume claim first. If you
@@ -116,7 +116,7 @@ Because all of the resources in this example have been tagged with the label `ap
 we can clean up everything that we created in one quick command using a selector on that label:
 
 ```shell
-kubectl delete petsets,pods,persistentvolumes,persistentvolumeclaims,services -l app=cockroachdb
+kubectl delete statefulsets,pods,persistentvolumes,persistentvolumeclaims,services -l app=cockroachdb
 ```
 
 

examples/cockroachdb/cockroachdb-petset.yaml → examples/cockroachdb/cockroachdb-statefulset.yaml

@@ -23,10 +23,10 @@ spec:
 apiVersion: v1
 kind: Service
 metadata:
-  # This service only exists to create DNS entries for each pet in the petset
-  # such that they can resolve each other's IP addresses. It does not create a
-  # load-balanced ClusterIP and should not be used directly by clients in most
-  # circumstances.
+  # This service only exists to create DNS entries for each pod in the stateful
+  # set such that they can resolve each other's IP addresses. It does not
+  # create a load-balanced ClusterIP and should not be used directly by clients
+  # in most circumstances.
   name: cockroachdb
   labels:
     app: cockroachdb
@@ -55,7 +55,7 @@ spec:
     app: cockroachdb
 ---
 apiVersion: apps/v1beta1
-kind: PetSet
+kind: StatefulSet
 metadata:
   name: cockroachdb
 spec:
@@ -71,8 +71,8 @@ spec:
         # it's started up for the first time. It has to exit successfully
         # before the pod's main containers are allowed to start.
         # This particular init container does a DNS lookup for other pods in
-        # the petset to help determine whether or not a cluster already exists.
-        # If any other pets exist, it creates a file in the cockroach-data
+        # the set to help determine whether or not a cluster already exists.
+        # If any other pods exist, it creates a file in the cockroach-data
         # directory to pass that information along to the primary container that
         # has to decide what command-line flags to use when starting CockroachDB.
         # This only matters when a pod's persistent volume is empty - if it has

examples/cockroachdb/minikube.sh

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Run the CockroachDB PetSet example on a minikube instance.
+# Run the CockroachDB StatefulSet example on a minikube instance.
 #
 # For a fresh start, run the following first:
 #   minikube delete
@@ -29,7 +29,7 @@
 set -exuo pipefail
 
 # Clean up anything from a prior run:
-kubectl delete petsets,pods,persistentvolumes,persistentvolumeclaims,services -l app=cockroachdb
+kubectl delete statefulsets,pods,persistentvolumes,persistentvolumeclaims,services -l app=cockroachdb
 
 # Make persistent volumes and (correctly named) claims. We must create the
 # claims here manually even though that sounds counter-intuitive. For details
@@ -69,4 +69,4 @@ spec:
 EOF
 done;
 
-kubectl create -f cockroachdb-petset.yaml
+kubectl create -f cockroachdb-statefulset.yaml

examples/examples_test.go

@@ -218,10 +218,10 @@ func TestExampleObjectSchemas(t *testing.T) {
 			"rbd-with-secret": &api.Pod{},
 		},
 		"../examples/storage/cassandra": {
-			"cassandra-daemonset":  &extensions.DaemonSet{},
-			"cassandra-controller": &api.ReplicationController{},
-			"cassandra-service":    &api.Service{},
-			"cassandra-petset":     &apps.StatefulSet{},
+			"cassandra-daemonset":   &extensions.DaemonSet{},
+			"cassandra-controller":  &api.ReplicationController{},
+			"cassandra-service":     &api.Service{},
+			"cassandra-statefulset": &apps.StatefulSet{},
 		},
 		"../examples/cluster-dns": {
 			"dns-backend-rc":      &api.ReplicationController{},

examples/storage/cassandra/cassandra-petset.yaml → examples/storage/cassandra/cassandra-statefulset.yaml

@@ -65,7 +65,7 @@ spec:
           timeoutSeconds: 5
         # These volume mounts are persistent. They are like inline claims,
         # but not exactly because the names need to match exactly one of
-        # the pet volumes.
+        # the stateful pod volumes.
         volumeMounts:
         - name: cassandra-data
           mountPath: /cassandra_data

examples/storage/cassandra/image/files/run.sh

@@ -18,7 +18,7 @@ set -e
 CONF_DIR=/etc/cassandra
 CFG=$CONF_DIR/cassandra.yaml
 
-# we are doing PetSet or just setting our seeds
+# we are doing StatefulSet or just setting our seeds
 if [ -z "$CASSANDRA_SEEDS" ]; then
   HOSTNAME=$(hostname -f)
 fi
@@ -78,7 +78,7 @@ echo "auto_bootstrap: ${CASSANDRA_AUTO_BOOTSTRAP}" >> $CFG
 # it will be able to get seeds from the seed provider
 if [[ $CASSANDRA_SEEDS == 'false' ]]; then
   sed -ri 's/- seeds:.*/- seeds: "'"$POD_IP"'"/' $CFG
-else # if we have seeds set them.  Probably PetSet
+else # if we have seeds set them.  Probably StatefulSet
   sed -ri 's/- seeds:.*/- seeds: "'"$CASSANDRA_SEEDS"'"/' $CFG
 fi
 

hack/make-rules/test-cmd.sh

@@ -2453,7 +2453,7 @@ __EOF__
   # Pre-condition: no statefulset exists
   kube::test::get_object_assert statefulset "{{range.items}}{{$id_field}}:{{end}}" ''
   # Command: create statefulset
-  kubectl create -f hack/testdata/nginx-petset.yaml "${kube_flags[@]}"
+  kubectl create -f hack/testdata/nginx-statefulset.yaml "${kube_flags[@]}"
 
   ### Scale statefulset test with current-replicas and replicas
   # Pre-condition: 0 replicas
@@ -2465,12 +2465,12 @@ __EOF__
   # Typically we'd wait and confirm that N>1 replicas are up, but this framework
   # doesn't start  the scheduler, so pet-0 will block all others.
   # TODO: test robust scaling in an e2e.
-  wait-for-pods-with-label "app=nginx-petset" "nginx-0"
+  wait-for-pods-with-label "app=nginx-statefulset" "nginx-0"
 
   ### Clean up
-  kubectl delete -f hack/testdata/nginx-petset.yaml "${kube_flags[@]}"
+  kubectl delete -f hack/testdata/nginx-statefulset.yaml "${kube_flags[@]}"
   # Post-condition: no pods from statefulset controller
-  wait-for-pods-with-label "app=nginx-petset" ""
+  wait-for-pods-with-label "app=nginx-statefulset" ""
 
 
   ######################

hack/testdata/nginx-petset.yaml → hack/testdata/nginx-statefulset.yaml

@@ -6,7 +6,7 @@ metadata:
     service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
   name: nginx
   labels:
-    app: nginx-petset
+    app: nginx-statefulset
 spec:
   ports:
   - port: 80
@@ -14,7 +14,7 @@ spec:
   # *.nginx.default.svc.cluster.local
   clusterIP: None
   selector:
-    app: nginx-petset
+    app: nginx-statefulset
 ---
 apiVersion: apps/v1beta1
 kind: StatefulSet
@@ -26,7 +26,7 @@ spec:
   template:
     metadata:
       labels:
-        app: nginx-petset
+        app: nginx-statefulset
       annotations:
         pod.alpha.kubernetes.io/initialized: "true"
     spec:
@@ -41,4 +41,3 @@ spec:
         - sh
         - -c
         - 'while true; do sleep 1; done'
-