Liferay OpenShift base concepts

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FirelayManagedServices

Liferay OpenShift bas concepts, precursor to Liferay OpenShift Workshop

Software

● This is a Kubernetes Cluster.
● This Cluster consists of 3 Nodes.
Each Node is a server.
● Software (Eg. webserver, appserver,
database etc) runs in a container in
a Pod.
● Kubernetes manages the Pods
● Deployments contain all settings to
run Software in the Pod, enabling
automated setup.
Kubernetes Nodes and Pods

● Kubernetes executes health checks
● When Kubernetes detects a Pod is
unhealthy
Kubernetes auto-recovery

● Kubernetes executes health checks
● When Kubernetes detects a Pod is
unhealthy, it will start a new Pod
(using the Deployment)
● It may allocate the new Pod
anywhere in the Cluster.
Kubernetes auto-recovery

● When a Node (server) fails
Kubernetes auto-recovery

● When a Node (server) fails,
Kubernetes detects the Pods are
unhealthy
Kubernetes auto-recovery

● When a Node (server) fails,
Kubernetes detects the Pods are
unhealthy.
● Kubernetes will Deploy the Pods on
healthy Nodes.
Kubernetes auto-recovery

● When a Node (server) fails,
Kubernetes detects the Pods are
unhealthy.
● Kubernetes will Deploy the Pods on
healthy Nodes.
● Finally the node is restarted.
Kubernetes auto-recovery

● Kubernetes monitors CPU usage
using a CPU probe
Kubernetes Nodes and Pods

● Kubernetes monitors CPU usage
using a CPU probe
● When load is high, Kubernetes may
start a new Pod (using the
Deployment)
Kubernetes Nodes and Pods

● Kubernetes monitors CPU usage
using a CPU probe
● When load is high, Kubernetes may
start a new Pod (using the
Deployment)
● The load is distributed over the
Pods.
Kubernetes Nodes and Pods

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Liferay OpenShift base concepts

3. ❏ ❏

4. ❏ ❏ ❏ ❏ ❏

5. ❏ ❏ ❏ ❏ ❏

8. Kubernetes Nodes and Pods

9. ● This is a Kubernetes Cluster. ● This Cluster consists of 3 Nodes. Each Node is a server. ● Software (Eg. webserver, appserver, database etc) runs in a container in a Pod. ● Kubernetes manages the Pods ● Deployments contain all settings to run Software in the Pod, enabling automated setup. Kubernetes Nodes and Pods

10. Kubernetes auto-recovery

11. ● Kubernetes executes health checks ● When Kubernetes detects a Pod is unhealthy Kubernetes auto-recovery

12. ● Kubernetes executes health checks ● When Kubernetes detects a Pod is unhealthy, it will start a new Pod (using the Deployment) ● It may allocate the new Pod anywhere in the Cluster. Kubernetes auto-recovery

13. ● Kubernetes executes health checks ● When Kubernetes detects a Pod is unhealthy, it will start a new Pod (using the Deployment) ● It may allocate the new Pod anywhere in the Cluster. ● Finally, Kubernetes will terminate the unhealthy Pod. Kubernetes auto-recovery

14. ● When a Node (server) fails Kubernetes auto-recovery

15. ● When a Node (server) fails, Kubernetes detects the Pods are unhealthy Kubernetes auto-recovery

16. ● When a Node (server) fails, Kubernetes detects the Pods are unhealthy. ● Kubernetes will Deploy the Pods on healthy Nodes. Kubernetes auto-recovery

17. ● When a Node (server) fails, Kubernetes detects the Pods are unhealthy. ● Kubernetes will Deploy the Pods on healthy Nodes. ● Finally the node is restarted. Kubernetes auto-recovery

18. Kubernetes (auto) scaling

19. ● Kubernetes monitors CPU usage using a CPU probe Kubernetes Nodes and Pods

20. ● Kubernetes monitors CPU usage using a CPU probe ● When load is high, Kubernetes may start a new Pod (using the Deployment) Kubernetes Nodes and Pods

21. ● Kubernetes monitors CPU usage using a CPU probe ● When load is high, Kubernetes may start a new Pod (using the Deployment) ● The load is distributed over the Pods. Kubernetes Nodes and Pods

22. Let’s try it yourself!

Liferay OpenShift base concepts

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