Develop a poc on zero downtime deployment - Githubissues

Tibil-vishwAAs / Vishwaas

Repo for Backend Service

MIT License

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Develop a poc on zero downtime deployment #66

Open krishnakr6 opened 1 year ago

krishnakr6 commented 1 year ago

[x] Understand zero downtime in details and terminologies.
[x] Poc on zero downtime using rolling updates in Kubernetes
[x] Blue-green deployment in Kubernetes using one cluster.
[ ] Blue-green deployment in AKS with different clusters.

krishnakr6 commented 1 year ago

developed POC using Java spring boot api app and tested rolling updates in kubernetes ( minikube ) in local system.
Ran repeated api call with 2 sec interval, during rolling update , there was connection timeout for one API request and then there was latest version data received for 2 api call, but 3rd and 4th api call returned previous version data. After 5th requests on wards all the following api call returned the latest version.

API calls Logs

krishnakr6 commented 1 year ago

Next will do blue-green deployment on AKS along with CI / CD with Github.

@amithrangadhol FYI

krishnakr6 commented 1 year ago

@AmithRangadhol04 provide the design document to implement blue green deployment

AmithRangadhol04 commented 1 year ago

A draft version of the Blue-Green deployment https://docs.google.com/document/d/1SdypndGznq_sbu4fI0eyFl5NONuPeacMB7yr82ZGqME/edit?usp=sharing

AmithRangadhol04 commented 1 year ago

Added steps for the blue-green deployment in one cluster https://docs.google.com/document/d/1SdypndGznq_sbu4fI0eyFl5NONuPeacMB7yr82ZGqME/edit?usp=sharing

[x] Got an error while starting the Minikube, trying to resolve it.

AmithRangadhol04 commented 1 year ago

Deployed the first version of the application and iteratively called the curl command with a 1-sec interval to validate it. Then deployed the latest version of the application and validated it.
At that time, only changed the traffic from the first version to the latest version, and it was successfully running.

Response of the application with traffic change

AmithRangadhol04 commented 1 year ago

I was having trouble doing the blue-green deployment with a separate cluster, so I spoke with Satish from the DevOps team about adjusting traffic between clusters. In order to switch traffic and do load balancing, Satish advised using the ingress file.

AmithRangadhol04 commented 1 year ago

Added steps, ETA, and the diagram of the Blue-green deployment in AKS with different Cluster, document reference link https://docs.google.com/document/d/1SdypndGznq_sbu4fI0eyFl5NONuPeacMB7yr82ZGqME/edit

AmithRangadhol04 commented 1 year ago

Added detailed steps with an updated diagram for the blue-green deployment in AKS with two cluster, document reference link https://docs.google.com/document/d/1SdypndGznq_sbu4fI0eyFl5NONuPeacMB7yr82ZGqME/edit?usp=sharing