Need to Demo a few Kubernetes Pods writing data to a Redis Data Service on PDS? Great, you are in the right place. :) I choose this over a node.js web ui, because I wanted to create some load and scale simulations (even though it is not that much).
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Deploy a Redis data Service on PDS. For this test it must a single node redis deployment, the redis-py library doesn't handly clustered Redis at this time. Look for a seperate demo for clustered Redis. After the deployment is ready make sure to grab the node name, Username and Password from the Connection link for the Service in PDS.
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Clone this repo
git clone https://github.com/2vcps/py-redis.git -
Edit
env-secret.yamlto match your environment. And Apply it to a namespace:
kubectl create ns py-redis
kuebctl -n py-redis apply -f env-secret.yaml
- Apply the worker.yaml to create the deployment.
kubectl -n py-redis apply -f worker.yaml
- Get the name of your Redis pod, in my case it is
red-jowings-o18106, you can find it in the PDS UI. Replace it in the POD= CLI below.
Verify your dataservice is working.
POD=`kubectl -n pds-demo get pods -l name=red-jowings-o18106 | grep Running | grep 2/2 | awk '{print $1}'`
kubectl -n pds-demo exec -it $POD -- bash
From the pod command line:
redis-cli --user pds --pass <pds password>
KEYS *
5100) "Colleen"
5101) "Quinton"
5102) "Tonda"
5103) "Marion"
5104) "Cristie"
5105) "Chara"
5106) "Bonny"
5107) "Loris"
5108) "Hee"
GET Hee
"6003"
Type quit then exit to get out of the container bash shell.
- You can also scale the worker deployment
kubectl -n py-redis scale deployment worker-redis --replicas=16
NAME READY STATUS RESTARTS AGE
worker-redis-6fb5c5d7bd-2q2mt 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-6w6wb 1/1 Running 0 6s
worker-redis-6fb5c5d7bd-8hfbw 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-c85b4 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-fxrz4 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-g6xq6 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-g9kjk 1/1 Running 0 61m
worker-redis-6fb5c5d7bd-kfjhb 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-mnzbx 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-n5nzq 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-pjjb8 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-qtc69 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-rldw7 1/1 Running 0 7s
worker-redis-6fb5c5d7bd-rzhjb 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-s2s2c 1/1 Running 0 60m
worker-redis-6fb5c5d7bd-vhr7m 1/1 Running 0 60m
Now check your PDS UI for metrics and see if the connections and other graphs have changed.
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