A Pod is the smallest deployable units of computing in a Kubernetes environment. A pod can host just one application (container) or several.<\/p>\n
Let us see if there are any pods running in the default namespace “default”<\/p>\n
[root@kubmaster01 ~]#<\/strong> kubectl get pod Now let us run an application (container) [root@kubmaster01 ~]#<\/strong> kubectl get pod The above command ran the app1 container using imperative<\/em> method. However, Kubernetes created the container using other default settings. Let us find out the configuration of the container in a yaml format. It reads that there is a pod named app1<\/em> running a container named app1<\/em>. One<\/em> out of One<\/em> container is running.<\/p>\n The below command displays the app1<\/em> pod in a yaml format<\/p>\n [root@kubmaster01 ~]#<\/strong> kubectl get pod app1 -o yaml<\/p>\n [root@kubmaster01 ~]#<\/strong> kubectl describe pod app1<\/p>\n ====== ===\u00a0<\/em> [root@kubmaster01 ~]#<\/strong> kubectl describe pod app1<\/p>\n ===== =====<\/em> [root@kubmaster01 ~]#<\/strong> kubectl explain pods<\/p>\n The above command explains the fields that are part of a yaml manifest file. However, it explains only the top-level parameters such as apiVersion, kind, metadata, spec, etc. If we need to see an explanation of the parameter that declared the name of the container in a pod, we will have to use the below command.<\/p>\n [root@kubmaster01 ~]#<\/strong> kubectl explain pod.spec.containers.name<\/p>\n An alternate method will be to use the “recursive” switch that explains all parameters\u00a0from top level to low-level as show below.<\/p>\n <\/p>\n [root@kubmaster01 ~]#<\/strong> kubectl get pod -o wide<\/p>\n","protected":false},"excerpt":{"rendered":"
\nNo resources found in default namespace.<\/p>\n
\n[root@kubmaster01 ~]#<\/strong> kubectl run app1 –image=httpd
\npod\/app1 created<\/p>\n
\n=======
\nNAME\u00a0 \u00a0 READY\u00a0 \u00a0 \u00a0STATUS\u00a0 \u00a0 \u00a0RESTARTS\u00a0 \u00a0 \u00a0AGE
\napp1\u00a0 \u00a0 1\/1\u00a0 \u00a0 Running\u00a0 \u00a0 \u00a00\u00a0 \u00a0 \u00a084s
\n========<\/p>\n
\nName: app1<\/em>
\nNamespace: default<\/em>
\nPriority: 0<\/em>
\nService Account: default<\/em>
\nNode: kubworker01\/192.168.146.130<\/em>
\nStart Time: Thu, 15 Aug ……<\/em>
\n===== ===<\/em><\/p>\n
\nName: app1<\/em>
\nNamespace: default<\/em>
\nPriority: 0<\/em>
\nService Account: default<\/em>
\nNode: kubworker01\/192.168.146.130<\/span><\/em>
\nStart Time: Thu, 15 Aug 2024 18:14:04 +0530<\/em>
\nLabels: run=app1<\/em>
\nAnnotations: cni.projectcalico.org\/containerID: b175aaf32640bea4bb365e3b41cdf901b0ae0d33b26113c18f5eb06025449b78<\/em>
\n cni.projectcalico.org\/podIP: 172.16.135.65\/32<\/em>
\n cni.projectcalico.org\/podIPs: 172.16.135.65\/32<\/em>
\nStatus: Running<\/em>
\nIP: 172.16.135.65<\/span><\/em>
\nIPs:<\/em>
\n IP: 172.16.135.65<\/span><\/em>
\nContainers:<\/em>
\n app1:<\/em>
\n Container ID: con<\/em>
\n===== =====<\/em><\/p>\n