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Experience of new CKA examination in November 2020

2021-06-21 22:54:59 Pumpkin, slow down

1 What is? CKA

CKA, namely Certificated Kubernetes Administrator,CNCF Official Kubernetes Skill Certification , The gold content is not bad . also CKAD, It's relatively simple , There's no need to take both . And recently CKS, It's very difficult. , The highest content of gold , Must get CKA Then you can take the exam .

CKA It's been revised recently , A lot of changes , The title and difficulty are different , In this paper, after the revision of the examination experience to do a simple comb .

2 Basic information and suggestions of the examination

Sort out the official information :

The examination fee is 300 dollar , Chinese is 2088, almost ;

The test duration is 2 Hours , Full marks 100 branch ,66 Sub pass , Altogether 17 Problem ;

The form of examination is Online exam 、 Remote invigilation , Examiners monitor by sharing desktops and cameras ;

You can sign up in Chinese or English , English is recommended , Then prepare your passport ; Because invigilators are generally foreigners , He doesn't recognize his ID card or Chinese ;

The exam needs to use Chrome plug-in unit , To install in advance ;

The exam should be in the room with no one else , Before the exam, the examiner will ask the examinee to turn around with the camera . It's better to make sure there's nothing else on the table , Especially books 、 Electronic products, etc ;

Try not to drink water and ask for rest in the exam , Two hours passed quickly ;

The examination needs to set up the command to complete automatically , Just set it once ;

The reference materials for the examination are kubernetes.io and GitHub Official website , No other web page ;

The browser can only open two tag, An exam , A reference , So it is strongly recommended to collect the webpage well ;

There are many languages in the exam , The English version is recommended , Chinese is translated , The meaning and string are not sure if there is a problem ;

Finish a question and try to verify it , If you use kubectl get or kubectl describe etc. ;

It works kubectl create And so on , Just order , Write yaml The files are going to be a lot slower ;

The test box provides a notepad for text editing , No local software is allowed ;

If you can't do it, you can skip it first ,mark Come down and do it later ; It's better to write it down in Notepad , Otherwise, after the network is interrupted and reloaded , The logo will be lost ;

Be sure to switch contexts , Otherwise, it may be the wrong environment , Or even change the correct answer ;

need ssh Jump to other machines , Remember to jump back after operation ;

I suggest practicing before the exam vi/vim, The exam is useful ;

3 What is the title

There are real questions on the Internet , You can find out , There are also answers . however , Never believe in the answers on the Internet , Some are probably wrong . Still need to be based on their own understanding , And make corresponding adjustments .

The so-called true topic , I won't share , Let's use our own search capabilities . The questions of my exam are as follows :

  1. clusterrole: Create and bind , It is suggested to use more commands ;
  2. deportation cordon/drain: It's simple , Remember to use kubectl get pod -o wide Check it out ;
  3. Upgrade cluster : It's hard , Follow the official website ;
  4. etcd Backup and recovery : It's hard , There are some orders on the official website , I still have to remember the rest ;
  5. Network strategy : The official website already has yaml Templates , It's just a simple change ;
  6. deployment Ports and exposed services : Simple ;
  7. ingress: Can pass curl To verify ;
  8. scale deployment: Simple , Operate from the command line ;
  9. Node selector: Simple , You can see node Of label Check it out ;
  10. Check out the spotless node: Simple , Get familiar with stains and tolerance ;
  11. Multi container Pod: There seems to be something wrong with the title , It's supposed to be simple ;
  12. establish pv: There are templates on the official website ;
  13. pvc Design and expansion , And record : There are templates on the official website , Remember to add --record, You can modify it and verify it ;
  14. Pod Log : Simple ;
  15. sidecar: This topic is a bit strange , Couldn't submit ;
  16. see pod Of cpu Usage rate : Simple , Use top command , Remember to sort ;
  17. Fault location , restart kubelet: Simple , Remember ssh And access .

4 summary

calm , All personnel 、 Listen to destiny , It's not that hard . Take an examination of 36 Hours later, , There are achievements . I wish you all harvest your own CKA Certificate .

attach :

Use alicloud to build an exercise platform : Detailed record with kubeadm stay Ubuntu Installation on Kubernetes colony

Common commands :Docker and Kubernetes Common commands ( Continuous sorting )

The exam must be :vim Common commands ,linux necessary


My favorite exam (Chrome Partial exports are not supported , Let's make do with it , Open it first and then collect it yourself ):

kubectl Memo sheet | Kubernetes
kubectl | Kubernetes
Kubectl Reference Docs
Use RBAC authentication | Kubernetes
node cordon| Kubernetes
deportation Make sure PodDisruptionBudget It's safe to empty a node under the premise of | Kubernetes
upgrade kubeadm colony | Kubernetes
by Kubernetes function etcd colony | Kubernetes
Network strategy | Kubernetes
service | Kubernetes
Ingress | Kubernetes
Deployments | Kubernetes
take Pod Assign to nodes | Kubernetes
Stain and tolerance | Kubernetes
Pod Topology extension constraints | Kubernetes
Init Containers | Kubernetes
Persistent volume | Kubernetes
Persistent volume pvc| Kubernetes
Persistent volume pod pvc | Kubernetes
volume volumeMounts | Kubernetes
To configure Pod To use the PersistentVolume As the storage | Kubernetes
volume - hostPath | Kubernetes
Storage class | Kubernetes
debugging Service | Kubernetes
Log structure | Kubernetes
Cluster troubleshooting | Kubernetes
emptyDir To configure Pod To use volumes for storage | Kubernetes
To configure Pod Use ConfigMap | Kubernetes
Use Secret Distribute credentials safely | Kubernetes
Pod And Service Of DNS | Kubernetes
install kubeadm | Kubernetes
by Pod Or container configuration security context | Kubernetes
Pod The security policy | Kubernetes

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