Kubectl: Difference between revisions
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<tt>kubectl get</tt> and <tt>kubectl describe</tt> mask sensitive information such as a [[Kubernetes Cluster Configuration Concepts#Secret|secret]]'s content to protect it from being exposed accidentally to an onlooker or from being stored in a terminal log. | <tt>kubectl get</tt> and <tt>kubectl describe</tt> mask sensitive information such as a [[Kubernetes Cluster Configuration Concepts#Secret|secret]]'s content to protect it from being exposed accidentally to an onlooker or from being stored in a terminal log. | ||
==Output in YAML Format== | ===Output in YAML Format=== | ||
kubectl get -o yaml ... | kubectl get -o yaml ... | ||
==Get the Manifest for an Existing Object== | ===Get the Manifest for an Existing Object=== | ||
The manifest can be used to recreate the object: | The manifest can be used to recreate the object: | ||
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Note that --export is deprecated and will be removed in the future so find an equivalent. | Note that --export is deprecated and will be removed in the future so find an equivalent. | ||
==Get an Individual Attribute Only== | ===Get an Individual Attribute Only=== | ||
<font color=darkgray>TODO: https://gist.github.com/so0k/42313dbb3b547a0f51a547bb968696ba</font> | <font color=darkgray>TODO: https://gist.github.com/so0k/42313dbb3b547a0f51a547bb968696ba</font> | ||
Revision as of 01:54, 7 September 2019
Internal
Overview
kubectl is the main Kubernetes command line tool, used to send REST API requests with JSON-formatted payloads into the API server.
Configuration
Commands
Options
Obtaining Information about API Objects
get
kubectl get
kubectl get and kubectl describe mask sensitive information such as a secret's content to protect it from being exposed accidentally to an onlooker or from being stored in a terminal log.
Output in YAML Format
kubectl get -o yaml ...
Get the Manifest for an Existing Object
The manifest can be used to recreate the object:
kubectl get pod pod-name --export -o yaml
Note that --export is deprecated and will be removed in the future so find an equivalent.
Get an Individual Attribute Only
TODO: https://gist.github.com/so0k/42313dbb3b547a0f51a547bb968696ba
kubectl ... -o jsonpath="{.status.phase}"
kubectl ... -o jsonpath="{.items[?(@.spec.unschedulable)].metadata.name}"
describe
kubectl describe
POSTing a Manifest
kubectl apply -f filename.yaml
Port Fowarding
while ! kubectl -n my-namespace port-forward service/my-service 8787:8787; do sleep 1; done