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K8s
- 1. Kubernetes Build High Quality Container Service Rapidly via Kubernetes1
- 2. Who am I ? 2
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- 4. Why we need kubernetes? 4
- 5. And you need to manage them at all time….. 5
- 7. Outline Introduction Architecture Pod Replication controller Deployment Service 7
- 8. What is Kubernetes 100% Open-source , written by Go Platform for automating deployment, scaling, and operations Inspired and informed by Google’s experiences and internal systems The name meaning “helmsman” or “pilot” Aka K8s, which is an abbreviation derived by replacing the 8 letters “ubernete” with 8 8
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- 12. How to install? Portable Multi-Node Cluster Master Node1 12
- 13. Use kubeadm to install Like docker swarm kubeadm init, and then And run the command to connect the master and install kubernetes 13
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- 16. Pod A Group of co-located containers(one or more) Shared the same value and network namespace/ip port Restart pofile Healthy Templates(yaml) 16
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- 20. Pod healthy Liveness probes When to restart a Container ExecAction Catch a deadlock Restart state help to record log InitialDelaySeconds PeriodSeconds Readiness Probe Remove all request Not sending message to this pod 20
- 21. The healthy of pod 21
- 22. label Arbitrary metadata The connect with Replication controller and pods key/value pairs identify a set of objects via a label selector 22
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- 24. Replication Controller Ensures that a specified number of pod “replicas” running at any time Flexible scale Auto change the replica Rolling Update 24
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- 29. The test of replicationcontroller The yaml file 29
- 30. We create the replicationController, which pod of label is test:rc And then we change the pod’s labels from rc to rc2 Because the replicationController get the information that no pod label is “rc”, so it create the new one 30
- 31. And we delete the pod Yes, the pod is different, that because the ReplicationController keep number is 1 of the pod which label is “rc” 31
- 32. And we can also change the number of replica Ofcourse, you can shrink the number of replica 32
- 33. Rolling update Use by deployment and ReplicationController Update period Reverse the version(if you need) 33
- 34. Now we have 4 v1(nginx1.10.5) pod And we set rolling update our replica Finally we update all pod to v2(nginx 1.11.5) 34
- 35. Deployment K8s of latest version will recommend us use deployment replace ReplicationController All features of ReplicationController Check the status of a Deployment to see if it succeeds or not Provides declarative updates for Pods and Replica Sets Pause and resume More powerful 35
- 36. Test: rolling update set image kubectl set image deployment <deployment> <container>=<image> Replace change the yaml file and use replace to polling update kubectl replace -f <yaml> Edit kubectl edit deployment <deployment> 36
- 37. set image 37
- 38. Edit 38
- 39. Service Defines a logical set of Pods and a policy by which to access them. A service rule defines a TCP or UDP port reservation Provides a way for applications running in containers to connect Use labels 39
- 40. The load balance service 40
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- 42. Openstack Magnum Container as a service Conductor Uses OpenStack Heat to deploy VM’s with kubernetes Uses Docker API Uses Kubernetes API (or other container orchestrator) If you are interesting , just try it ! 42