12 CHAPTER 2. KUBERNETES ARCHITECTURE
3. View the details of the deployment, then the pod. Work through the output slowly. Knowing what a healthy deployment
and looks like can be helpful when troubleshooting issues. Again the Tab key can be helpful when using long auto-
generated object names. You should be able to type firstpodTab and the name will complete when viewing the pod.
student@ckad-1:~$ kubectl describe deployment firstpod
Name: firstpod
Namespace: default
CreationTimestamp: Fri, 25 Jul 2018 16:46:57 +0000
Labels: run=firstpod
Annotations: deployment.kubernetes.io/revision=1
Selector: run=firstpod
Replicas: 1 desired | 1 updated | 1 total | 1 available....
StrategyType: RollingUpdate
MinReadySeconds: 0
<output_omitted>
student@ckad-1:~$ kubectl describe pod firstpod-6bb4574d94-rqk76
Name: firstpod-6bb4574d94-rqk76
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: ckad-1/10.128.0.2
Start Time: Wed, 25 Jul 2018 06:13:18 +0000
Labels: pod-template-hash=2660130850
run=firstpod
Annotations: <none>
Status: Running
IP: 192.168.200.65
Controlled By: ReplicaSet/firstpod-6bb4574d94
<output_omitted>
4. Note that the resources are in the default namespace. Get a list of available namespaces.
student@ckad-1:~$ kubectl get namespaces
NAME STATUS AGE
default Active 20m
kube-public Active 20m
kube-system Active 20m
5. There are two other namespaces. Look at the pods in the kube-system namespace.
student@ckad-1:~$ kubectl get pod -n kube-system
NAME READY STATUS RESTARTS AGE
calico-etcd-rvrpk 1/1 Running 1 20m
calico-kube-controllers-d554689d5-lm687 1/1 Running 1 20m
calico-node-2ck9g 2/2 Running 4 19m
calico-node-kkxvl 2/2 Running 3 20m
etcd-ckad-1 1/1 Running 1 20m
<output_omitted>
6. Now look at the pods in a namespace that does not exist. Note you do not receive an error.
student@ckad-1:~$ kubectl get pod -n fakenamespace
No resources found.
7. You can also view resources in all namespaces at once. Use the --all-namespaces options to select objects in all
namespaces at once.
student@ckad-1:~$ kubectl get pod --all-namespaces
LFD259: V 2019-03-11 © Copyright the Linux Foundation 2019. All rights reserved.
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