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Kubernetes Cheat Sheet: ViewingResource Information, Cheat Sheet of Computer Applications

Franklin UniversityComputer Applications

Kubernetes is a platform for managing containerized workloads

Typology: Cheat Sheet

2019/2020

Uploaded on 10/09/2020

arold
arold 🇺🇸

4.7

(24)

376 documents

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Kubernetes Cheat
Sheet
What is Kubernetes?
http://linuxacademy.com
Kubernetes is a platform for managing containerized
workloads. Kubernetes orchestrates computing,
networking and storage to provide a seamless portability
across infrastructure providers.
Viewing Resource Information
Nodes
$ k ubect l get no
$ k ubect l get no - o wi de
$ k ubect l des cr i be no
$ k ubect l get no - o y aml
$ k ubect l get node - - sel ect or =[ l abel _name]
$ k ubect l get nodes - o
j sonpat h=' { . i t ems [ * ] . st at us . addr esses
[ ?( @. t ype==" Ext er nal I P" ) ] . addr ess } '
$ kubect l t op node [ node_name]
Pods
$ k ubect l get po
$ k ubect l get po - o wi de
$ k ubect l des cr i be po
$ k ubect l get po - - show- l abel s
$ k ubect l get po - l app=ngi nx
$ k ubect l get po - o y aml
$ k ubect l get pod [ pod_name] - o yaml
- - expor t
$ k ubect l get pod [ pod_name] - o yaml
- - expor t > nameof f i l e. y aml
$ k ubect l get pods - - f i el d- s el ec t or
st at us. phase=Runni ng
Namespaces
$ k ubect l get ns
$ k ubect l get ns - o yaml
$ k ubect l des cr i be ns
Deployments
$ k ubect l get depl oy
$ k ubect l des cr i be depl oy
$ k ubect l get depl oy - o wi de
$ k ubect l get depl oy - o yaml
Services
$ k ubect l get svc
$ k ubect l des cr i be svc
$ k ubect l get svc - o wi de
$ k ubect l get svc - o y aml
$ k ubect l get svc - - show- l abel s
DaemonSets
$ k ubect l get ds
$ k ubect l get ds - - al l - namespaces
$ k ubect l des cr i be ds [ daemons et _name] - n
[ namespace_name]
$ k ubect l get ds [ ds_name] - n [ ns _name] - o
yaml
Events
$ k ubect l get ev ent s
$ k ubect l get ev ent s - n k ube- sy st em
$ k ubect l get ev ent s - w
Logs
$ kubect l l ogs [ pod_name]
$ k ubect l l ogs - - si nc e=1h [ pod_name]
$ k ubect l l ogs - - t ai l =20 [ pod_name]
$ k ubect l l ogs - f - c [ cont ai ner _name]
[ pod_name]
$ k ubect l l ogs [ pod_name] > pod. l og
Service Accounts
$ k ubect l get sa
$ k ubect l get sa - o y aml
$ k ubect l get ser vi ceaccount s def aul t - o
yaml > . / sa. yaml
$ k ubect l r epl ac e ser vi ceacc ount def aul t - f
. / sa. yaml
ReplicaSets
$ k ubect l get r s
$ k ubect l des cr i be r s
$ k ubect l get r s - o wi de
$ k ubect l get r s - o y aml
Roles
$ k ubect l get r ol es - - al l - namespac es
$ k ubect l get r ol es - - al l - namespac es - o yaml
Secrets
$ k ubect l get secr et s
$ k ubect l get secr et s - - al l - namespaces
$ k ubect l get secr et s - o yaml
ConfigMaps
$ k ubect l get cm
$ k ubect l get cm - - al l - names paces
$ k ubect l get cm - - al l - names paces - o yaml
Ingress
$ k ubect l get i ng
$ k ubect l get i ng - - al l - namespaces
PersistentVolume
$ k ubect l get pv
$ k ubect l des cr i be pv
PersistentVolumeClaim
$ k ubect l get pv c
$ k ubect l des cr i be pv c
pf2

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Download Kubernetes Cheat Sheet: ViewingResource Information and more Cheat Sheet Computer Applications in PDF only on Docsity!

Kubernetes Cheat

Sheet

What is Kubernetes?

http://linuxacademy.com

Kubernetes is a platform for managing containerized

workloads. Kubernetes orchestrates computing,

networking and storage to provide a seamless portability

across infrastructure providers.

Viewing Resource Information

Nodes $ kubect l get no $ kubect l get no - o wi de $ kubect l descr i be no $ kubect l get no - o yaml $ kubect l get node - - sel ect or =[ l abel _name] $ kubect l get nodes - o j sonpat h=' {. i t ems[ * ]. st at us. addr esses [ ?( @. t ype==" Ext er nal I P" ) ]. addr ess} ' $ kubect l t op node [ node_name] Pods $ kubect l get po $ kubect l get po - o wi de $ kubect l descr i be po $ kubect l get po - - show- l abel s $ kubect l get po - l app=ngi nx $ kubect l get po - o yaml $ kubect l get pod [ pod_name] - o yaml

    • expor t $ kubect l get pod [ pod_name] - o yaml
    • expor t > nameof f i l e. yaml $ kubect l get pods - - f i el d- sel ect or st at us. phase=Runni ng Namespaces $ kubect l get ns $ kubect l get ns - o yaml $ kubect l descr i be ns Deployments $ kubect l get depl oy $ kubect l descr i be depl oy $ kubect l get depl oy - o wi de $ kubect l get depl oy - o yaml Services $ kubect l get svc $ kubect l descr i be svc $ kubect l get svc - o wi de $ kubect l get svc - o yaml $ kubect l get svc - - show- l abel s DaemonSets $ kubect l get ds $ kubect l get ds - - al l - namespaces $ kubect l descr i be ds [ daemonset _name] - n [ namespace_name] $ kubect l get ds [ ds_name] - n [ ns_name] - o yaml Events $ kubect l get event s $ kubect l get event s - n kube- syst em $ kubect l get event s - w Logs $ kubect l l ogs [ pod_name] $ kubect l l ogs - - si nce=1h [ pod_name] $ kubect l l ogs - - t ai l =20 [ pod_name] $ kubect l l ogs - f - c [ cont ai ner _name] [ pod_name] $ kubect l l ogs [ pod_name] > pod. l og Service Accounts $ kubect l get sa $ kubect l get sa - o yaml $ kubect l get ser vi ceaccount s def aul t - o yaml >. / sa. yaml $ kubect l r epl ace ser vi ceaccount def aul t - f . / sa. yaml ReplicaSets $ kubect l get r s $ kubect l descr i be r s $ kubect l get r s - o wi de $ kubect l get r s - o yaml Roles $ kubect l get r ol es - - al l - namespaces $ kubect l get r ol es - - al l - namespaces - o yaml Secrets $ kubect l get secr et s $ kubect l get secr et s - - al l - namespaces $ kubect l get secr et s - o yaml ConfigMaps $ kubect l get cm $ kubect l get cm - - al l - namespaces $ kubect l get cm - - al l - namespaces - o yaml Ingress $ kubect l get i ng $ kubect l get i ng - - al l - namespaces PersistentVolume $ kubect l get pv $ kubect l descr i be pv PersistentVolumeClaim $ kubect l get pvc $ kubect l descr i be pvc

Kubernetes Cheat

Sheet

http://linuxacademy.com

Viewing Resource Information (cont.)

StorageClass $ kubect l get sc $ kubect l get sc - o yaml Multiple Resources $ kubect l get svc, po $ kubect l get depl oy, no $ kubect l get al l $ kubect l get al l - - al l - namespaces Deployments/Namespaces $ kubect l edi t depl oy [ depl oy_name] $ kubect l del et e depl oy [ depl oy_name] $ kubect l expose depl oy [ depl oy_name]

    • por t =80 - - t ype=NodePor t $ kubect l scal e depl oy [ depl oy_name]
    • r epl i cas= $ kubect l del et e ns $ kubect l edi t ns [ ns_name] Services $ kubect l edi t svc [ svc_name] $ kubect l del et e svc [ svc_name] Taint $ kubect l t ai nt [ node_name] [ t ai nt _name] Labels $ kubect l l abel [ node_name] di skt ype=ssd $ kubr ect l l abel [ pod_name] env=pr od DaemonSets $ kubect l edi t ds [ ds_name] - n kube- syst em $ kubect l del et e ds [ ds_name] Service Accounts $ kubect l edi t sa [ sa_name] $ kubect l del et e sa [ sa_name]

Changing Resource Attributes

page 2 Cordon/Uncordon $ kubect l cor don [ node_name] $ kubect l uncor don [ node_name] Drain $ kubect l dr ai n [ node_name] Nodes/Pods $ kubect l del et e node [ node_name] $ kubect l del et e pod [ pod_name] $ kubect l edi t node [ node_name] $ kubect l edi t pod [ pod_name] Annotate $ kubect l annot at e po [ pod_name] [ annot at i on] $ kubect l annot at e no [ node_name]

Adding Resources

Creating a Pod $ kubect l cr eat e - f [ name_of _f i l e] $ kubect l appl y - f [ name_of _f i l e] $ kubect l r un [ pod_name] - - i mage=ngi nx

    • r est ar t =Never $ kubect l r un [ pod_name]
    • gener at or =r un- pod/ v1 - - i mage=ngi nx $ kubect l r un [ pod_name] - - i mage=ngi nx
    • r est ar t =Never Creating a Deployment $ kubect l cr eat e - f [ name_of _f i l e] $ kubect l appl y - f [ name_of _f i l e] $ kubect l cr eat e depl oy [ depl oy_name]
        • i mage=ngi nx

Requests

API Call $ kubect l get - - r aw / api s/ met r i cs. k8s. i o/ Cluster Info $ kubect l conf i g $ kubect l cl ust er - i nf o $ kubect l get component st at uses Interactive Pod $ kubect l r un [ pod_name] - - i mage=busybox

    • r m - i t - - r est ar t =Never - - sh Output YAML to a File $ kubect l cr eat e depl oy [ depl oy_name]
        • i mage=ngi nx - - dr y- r un - o yaml > depl oy. yaml $ kubect l get po [ pod_name] - o yaml - - expor t

      pod. yaml Getting Help $ kubect l - h $ kubect l cr eat e - h $ kubect l r un - h $ kubect l expl ai n depl oy. spec Creating a Service $ kubect l cr eat e svc nodepor t [ svc_name]

    • t cp=8080: 80