kubectl Cheat Sheet – In-Depth Guide<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n line-height: 1.6;\n padding: 20px;\n background-color: #f9f9f9;\n color: #333;\n }\n h1, h2, h3 {\n color: #222;\n }\n pre {\n background: #f4f4f4;\n padding: 12px;\n border-left: 4px solid #ccc;\n overflow-x: auto;\n }\n code {\n background: #eee;\n padding: 2px 4px;\n border-radius: 4px;\n font-family: Consolas, monospace;\n }\n hr {\n border: none;\n border-top: 2px solid #ddd;\n margin: 40px 0;\n }\n <\/style>\n<\/head>\n<body>\n\n<p>Managing Kubernetes clusters efficiently requires fluency with <code>kubectl<\/code>, the command-line interface for interacting with the Kubernetes API. Whether you’re deploying applications, viewing logs, or debugging infrastructure, this tool is your gateway to smooth cluster operations.<\/p>\n\n<p>This in-depth cheat sheet will give you a comprehensive reference of how to use <code>kubectl<\/code> effectively in real-world operations, including advanced flags, filtering tricks, rolling updates, patching, output formatting, and resource exploration.<\/p>\n\n<hr \/>\n\n<h2>Shell Autocompletion<\/h2>\n<p>Boost productivity with shell autocompletion for <code>kubectl<\/code>:<\/p>\n\n<h3>Bash<\/h3>\n<pre><code>source <(kubectl completion bash)\necho \"source <(kubectl completion bash)\" >> ~\/.bashrc<\/code><\/pre>\n\n<h3>ZSH<\/h3>\n<pre><code>source <(kubectl completion zsh)\necho '[[ $commands[kubectl] ]] && source <(kubectl completion zsh)' >> ~\/.zshrc<\/code><\/pre>\n\n<h3>Aliases<\/h3>\n<pre><code>alias k=kubectl\ncomplete -o default -F __start_kubectl k<\/code><\/pre>\n\n<hr \/>\n\n<h2>Working with Contexts & Clusters<\/h2>\n<pre><code>kubectl config view # Show merged config\nkubectl config get-contexts # List contexts\nkubectl config current-context # Show current context\nkubectl config use-context my-context # Switch to context<\/code><\/pre>\n\n<p>Set default namespace for future commands:<\/p>\n<pre><code>kubectl config set-context --current --namespace=my-namespace<\/code><\/pre>\n\n<hr \/>\n\n<h2>Deployments & YAML Management<\/h2>\n<pre><code>kubectl apply -f .\/manifest.yaml # Apply resource(s)\nkubectl apply -f .\/dir\/ # Apply all YAMLs in directory\nkubectl create deployment nginx --image=nginx\nkubectl explain pod # Show pod schema<\/code><\/pre>\n\n<p>Apply resources from multiple sources:<\/p>\n<pre><code>kubectl apply -f .\/one.yaml -f .\/two.yaml\nkubectl apply -f https:\/\/example.com\/config.yaml<\/code><\/pre>\n\n<hr \/>\n\n<h2>Viewing & Finding Resources<\/h2>\n<pre><code>kubectl get pods # List all pods\nkubectl get pods -o wide # Detailed pod listing\nkubectl get services # List services\nkubectl describe pod my-pod # Detailed pod info<\/code><\/pre>\n\n<p>Filter & sort:<\/p>\n<pre><code>kubectl get pods --field-selector=status.phase=Running\nkubectl get pods --sort-by='.status.containerStatuses[0].restartCount'<\/code><\/pre>\n\n<p>Find pod labels:<\/p>\n<pre><code>kubectl get pods --show-labels<\/code><\/pre>\n\n<hr \/>\n\n<h2>Updating & Rolling Deployments<\/h2>\n<pre><code>kubectl set image deployment\/web nginx=nginx:1.19 # Set new image\nkubectl rollout status deployment\/web # Watch rollout\nkubectl rollout history deployment\/web # Show revisions\nkubectl rollout undo deployment\/web # Undo last change\nkubectl rollout undo deployment\/web --to-revision=2 # Revert to specific<\/code><\/pre>\n\n<hr \/>\n\n<h2>Editing, Scaling, Deleting<\/h2>\n<pre><code>kubectl edit deployment\/web # Live edit YAML\nkubectl scale deployment\/web --replicas=5 # Scale up\/down\nkubectl delete pod my-pod # Delete by name\nkubectl delete -f pod.yaml # Delete from file<\/code><\/pre>\n\n<hr \/>\n\n<h2>Logs, Execs & Debugging<\/h2>\n<pre><code>kubectl logs my-pod # View logs\nkubectl logs my-pod -c container-name # Logs from container\nkubectl logs my-pod --previous # Logs from crashed\nkubectl exec my-pod -- ls \/ # Run command\nkubectl exec -it my-pod -- bash # Shell access<\/code><\/pre>\n\n<hr \/>\n\n<h2>Working with Services<\/h2>\n<pre><code>kubectl expose pod nginx --port=80 --target-port=8080 # Create service\nkubectl port-forward svc\/my-service 8080:80 # Forward to local<\/code><\/pre>\n\n<hr \/>\n\n<h2>Resource Metrics<\/h2>\n<pre><code>kubectl top pod # Pod metrics\nkubectl top pod --sort-by=cpu # Sort by CPU\nkubectl top node # Node metrics<\/code><\/pre>\n\n<hr \/>\n\n<h2>Patching Resources<\/h2>\n<p>Strategic merge patch:<\/p>\n<pre><code>kubectl patch deployment my-deploy -p '{\"spec\":{\"replicas\":4}}'<\/code><\/pre>\n\n<p>JSON patch with array targeting:<\/p>\n<pre><code>kubectl patch pod my-pod --type='json' -p='[\n {\"op\": \"replace\", \"path\": \"\/spec\/containers\/0\/image\", \"value\":\"nginx:1.21\"}\n]'<\/code><\/pre>\n\n<hr \/>\n\n<h2>Cluster & Node Management<\/h2>\n<pre><code>kubectl cordon my-node # Prevent new pods\nkubectl drain my-node # Evict pods for maintenance\nkubectl uncordon my-node # Resume scheduling\nkubectl get nodes # List all nodes\nkubectl describe node my-node # Node details<\/code><\/pre>\n\n<hr \/>\n\n<h2>Output Formatting<\/h2>\n<pre><code>kubectl get pods -o json\nkubectl get pods -o yaml\nkubectl get pods -o custom-columns=\"NAME:.metadata.name,IMAGE:.spec.containers[*].image\"<\/code><\/pre>\n\n<hr \/>\n\n<h2>Exploring API Resources<\/h2>\n<pre><code>kubectl api-resources # List all resources\nkubectl api-resources --namespaced=false # Non-namespaced\nkubectl api-resources -o wide # Extended info<\/code><\/pre>\n\n<hr \/>\n\n<h2>Logging & Verbosity<\/h2>\n<pre><code>kubectl get pods -v=6 # Debug output\nkubectl get deployment -v=9 # Full API trace<\/code><\/pre>\n\n<hr \/>\n\n<h2>Deployment Template Example<\/h2>\n<pre><code>apiVersion: apps\/v1\nkind: Deployment\nmetadata:\n name: nginx-deployment\n namespace: my-namespace\nspec:\n replicas: 3\n selector:\n matchLabels:\n app: nginx\n template:\n metadata:\n labels:\n app: nginx\n spec:\n containers:\n - name: nginx\n image: nginx:latest\n ports:\n - containerPort: 80<\/code><\/pre>\n\n<hr \/>\n\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>kubectl Cheat Sheet – In-Depth Guide Managing Kubernetes clusters efficiently requires fluency with kubectl, the command-line interface for interacting with the Kubernetes API. Whether you’re deploying applications, viewing logs, or debugging infrastructure, this tool is your gateway to smooth cluster operations. This in-depth cheat sheet will give you a comprehensive reference of how to use kubectl effectively in real-world operations,<a href=\"https:\/\/nicktailor.com\/tech-blog\/1955\/\" class=\"read-more\">Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[145],"tags":[],"class_list":["post-1955","post","type-post","status-publish","format-standard","hentry","category-devops"],"_links":{"self":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/comments?post=1955"}],"version-history":[{"count":3,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955\/revisions"}],"predecessor-version":[{"id":1960,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955\/revisions\/1960"}],"wp:attachment":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/media?parent=1955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/categories?post=1955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/tags?post=1955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":1955,"date":"2024-06-11T06:49:27","date_gmt":"2024-06-11T06:49:27","guid":{"rendered":"https:\/\/www.nicktailor.com\/?p=1955"},"modified":"2025-06-11T07:13:17","modified_gmt":"2025-06-11T07:13:17","slug":"1955","status":"publish","type":"post","link":"https:\/\/nicktailor.com\/tech-blog\/1955\/","title":{"rendered":"Cheat Sheet for DevOps Engineers"},"content":{"rendered":"\n\n\n\n \n kubectl Cheat Sheet – In-Depth Guide<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n line-height: 1.6;\n padding: 20px;\n background-color: #f9f9f9;\n color: #333;\n }\n h1, h2, h3 {\n color: #222;\n }\n pre {\n background: #f4f4f4;\n padding: 12px;\n border-left: 4px solid #ccc;\n overflow-x: auto;\n }\n code {\n background: #eee;\n padding: 2px 4px;\n border-radius: 4px;\n font-family: Consolas, monospace;\n }\n hr {\n border: none;\n border-top: 2px solid #ddd;\n margin: 40px 0;\n }\n <\/style>\n<\/head>\n<body>\n\n<p>Managing Kubernetes clusters efficiently requires fluency with <code>kubectl<\/code>, the command-line interface for interacting with the Kubernetes API. Whether you’re deploying applications, viewing logs, or debugging infrastructure, this tool is your gateway to smooth cluster operations.<\/p>\n\n<p>This in-depth cheat sheet will give you a comprehensive reference of how to use <code>kubectl<\/code> effectively in real-world operations, including advanced flags, filtering tricks, rolling updates, patching, output formatting, and resource exploration.<\/p>\n\n<hr \/>\n\n<h2>Shell Autocompletion<\/h2>\n<p>Boost productivity with shell autocompletion for <code>kubectl<\/code>:<\/p>\n\n<h3>Bash<\/h3>\n<pre><code>source <(kubectl completion bash)\necho \"source <(kubectl completion bash)\" >> ~\/.bashrc<\/code><\/pre>\n\n<h3>ZSH<\/h3>\n<pre><code>source <(kubectl completion zsh)\necho '[[ $commands[kubectl] ]] && source <(kubectl completion zsh)' >> ~\/.zshrc<\/code><\/pre>\n\n<h3>Aliases<\/h3>\n<pre><code>alias k=kubectl\ncomplete -o default -F __start_kubectl k<\/code><\/pre>\n\n<hr \/>\n\n<h2>Working with Contexts & Clusters<\/h2>\n<pre><code>kubectl config view # Show merged config\nkubectl config get-contexts # List contexts\nkubectl config current-context # Show current context\nkubectl config use-context my-context # Switch to context<\/code><\/pre>\n\n<p>Set default namespace for future commands:<\/p>\n<pre><code>kubectl config set-context --current --namespace=my-namespace<\/code><\/pre>\n\n<hr \/>\n\n<h2>Deployments & YAML Management<\/h2>\n<pre><code>kubectl apply -f .\/manifest.yaml # Apply resource(s)\nkubectl apply -f .\/dir\/ # Apply all YAMLs in directory\nkubectl create deployment nginx --image=nginx\nkubectl explain pod # Show pod schema<\/code><\/pre>\n\n<p>Apply resources from multiple sources:<\/p>\n<pre><code>kubectl apply -f .\/one.yaml -f .\/two.yaml\nkubectl apply -f https:\/\/example.com\/config.yaml<\/code><\/pre>\n\n<hr \/>\n\n<h2>Viewing & Finding Resources<\/h2>\n<pre><code>kubectl get pods # List all pods\nkubectl get pods -o wide # Detailed pod listing\nkubectl get services # List services\nkubectl describe pod my-pod # Detailed pod info<\/code><\/pre>\n\n<p>Filter & sort:<\/p>\n<pre><code>kubectl get pods --field-selector=status.phase=Running\nkubectl get pods --sort-by='.status.containerStatuses[0].restartCount'<\/code><\/pre>\n\n<p>Find pod labels:<\/p>\n<pre><code>kubectl get pods --show-labels<\/code><\/pre>\n\n<hr \/>\n\n<h2>Updating & Rolling Deployments<\/h2>\n<pre><code>kubectl set image deployment\/web nginx=nginx:1.19 # Set new image\nkubectl rollout status deployment\/web # Watch rollout\nkubectl rollout history deployment\/web # Show revisions\nkubectl rollout undo deployment\/web # Undo last change\nkubectl rollout undo deployment\/web --to-revision=2 # Revert to specific<\/code><\/pre>\n\n<hr \/>\n\n<h2>Editing, Scaling, Deleting<\/h2>\n<pre><code>kubectl edit deployment\/web # Live edit YAML\nkubectl scale deployment\/web --replicas=5 # Scale up\/down\nkubectl delete pod my-pod # Delete by name\nkubectl delete -f pod.yaml # Delete from file<\/code><\/pre>\n\n<hr \/>\n\n<h2>Logs, Execs & Debugging<\/h2>\n<pre><code>kubectl logs my-pod # View logs\nkubectl logs my-pod -c container-name # Logs from container\nkubectl logs my-pod --previous # Logs from crashed\nkubectl exec my-pod -- ls \/ # Run command\nkubectl exec -it my-pod -- bash # Shell access<\/code><\/pre>\n\n<hr \/>\n\n<h2>Working with Services<\/h2>\n<pre><code>kubectl expose pod nginx --port=80 --target-port=8080 # Create service\nkubectl port-forward svc\/my-service 8080:80 # Forward to local<\/code><\/pre>\n\n<hr \/>\n\n<h2>Resource Metrics<\/h2>\n<pre><code>kubectl top pod # Pod metrics\nkubectl top pod --sort-by=cpu # Sort by CPU\nkubectl top node # Node metrics<\/code><\/pre>\n\n<hr \/>\n\n<h2>Patching Resources<\/h2>\n<p>Strategic merge patch:<\/p>\n<pre><code>kubectl patch deployment my-deploy -p '{\"spec\":{\"replicas\":4}}'<\/code><\/pre>\n\n<p>JSON patch with array targeting:<\/p>\n<pre><code>kubectl patch pod my-pod --type='json' -p='[\n {\"op\": \"replace\", \"path\": \"\/spec\/containers\/0\/image\", \"value\":\"nginx:1.21\"}\n]'<\/code><\/pre>\n\n<hr \/>\n\n<h2>Cluster & Node Management<\/h2>\n<pre><code>kubectl cordon my-node # Prevent new pods\nkubectl drain my-node # Evict pods for maintenance\nkubectl uncordon my-node # Resume scheduling\nkubectl get nodes # List all nodes\nkubectl describe node my-node # Node details<\/code><\/pre>\n\n<hr \/>\n\n<h2>Output Formatting<\/h2>\n<pre><code>kubectl get pods -o json\nkubectl get pods -o yaml\nkubectl get pods -o custom-columns=\"NAME:.metadata.name,IMAGE:.spec.containers[*].image\"<\/code><\/pre>\n\n<hr \/>\n\n<h2>Exploring API Resources<\/h2>\n<pre><code>kubectl api-resources # List all resources\nkubectl api-resources --namespaced=false # Non-namespaced\nkubectl api-resources -o wide # Extended info<\/code><\/pre>\n\n<hr \/>\n\n<h2>Logging & Verbosity<\/h2>\n<pre><code>kubectl get pods -v=6 # Debug output\nkubectl get deployment -v=9 # Full API trace<\/code><\/pre>\n\n<hr \/>\n\n<h2>Deployment Template Example<\/h2>\n<pre><code>apiVersion: apps\/v1\nkind: Deployment\nmetadata:\n name: nginx-deployment\n namespace: my-namespace\nspec:\n replicas: 3\n selector:\n matchLabels:\n app: nginx\n template:\n metadata:\n labels:\n app: nginx\n spec:\n containers:\n - name: nginx\n image: nginx:latest\n ports:\n - containerPort: 80<\/code><\/pre>\n\n<hr \/>\n\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>kubectl Cheat Sheet – In-Depth Guide Managing Kubernetes clusters efficiently requires fluency with kubectl, the command-line interface for interacting with the Kubernetes API. Whether you’re deploying applications, viewing logs, or debugging infrastructure, this tool is your gateway to smooth cluster operations. This in-depth cheat sheet will give you a comprehensive reference of how to use kubectl effectively in real-world operations,<a href=\"https:\/\/nicktailor.com\/tech-blog\/1955\/\" class=\"read-more\">Read More …<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[145],"tags":[],"class_list":["post-1955","post","type-post","status-publish","format-standard","hentry","category-devops"],"_links":{"self":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/comments?post=1955"}],"version-history":[{"count":3,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955\/revisions"}],"predecessor-version":[{"id":1960,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/posts\/1955\/revisions\/1960"}],"wp:attachment":[{"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/media?parent=1955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/categories?post=1955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nicktailor.com\/tech-blog\/wp-json\/wp\/v2\/tags?post=1955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}