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Exercise 2.01: Connecting pods

Prompt: Allow pods to talk to eachother

- Connect the "Log output" application and "Ping-pong" application. Instead of sharing data via files use HTTP endpoints to respond with the number of pongs. Deprecate all the volume between the two applications for the time being.

Get started: Copy directory ex-1-09 as ex-1-11.

Hint

  • Make changes in makefile
  • Add namespace to all yaml files

Make sure both tests work

- Start by testing pong app. This http://localhost:8081/pingpong should save data which will be useful in the next step.

- Once we hit http://localhost:8081/now, we should see two lines, (a) log output and (b) second pong count. Go refresh http://localhost:8081/pingpong and come back here to ensure the pong count is updated.

Notes:

Solution

- cd to this directory, run `make relaunch-cluster`. Check http://localhost:8081/pingpong, check http://localhost:8081/now, check http://localhost:8081/pingpong to see a new count, and finally check http://localhost:8081/now .

Source: DevOps with Kubernetes