Webinar Series: Deploying Stateful Services in Kubernetes

				
					
[secondary_label Output]

NAME: todo

LAST DEPLOYED: Sat Mar 31 10:37:06 2018

NAMESPACE: default

STATUS: <^>DEPLOYED<^>



RESOURCES:

==> v1/Service

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE

<^>todo-mongodb-replicaset<^> ClusterIP None <none> 27017/TCP 1s



==> v1beta1/StatefulSet

NAME DESIRED CURRENT AGE

<^>todo-mongodb-replicaset<^> 3 1 0s



==> v1/Pod(related)

NAME READY STATUS RESTARTS AGE

<^>todo-mongodb-replicaset-0<^> 0/1 Init:0/2 0 0s



==> v1/ConfigMap

NAME DATA AGE

<^>todo-mongodb-replicaset<^> 1 1s

<^>todo-mongodb-replicaset-tests<^> 1 1s





NOTES:

1. After the statefulset is created completely, one can check which instance is primary by running:



 $ for ((i = 0; i < 3; ++i)); do kubectl exec --namespace default todo-mongodb-replicaset-$i -- sh -c 'mongo --eval="printjson(rs.isMaster())"'; done



2. One can insert a key into the primary instance of the mongodb replica set by running the following:

 MASTER_POD_NAME must be replaced with the name of the master found from the previous step.



 $ kubectl exec --namespace default MASTER_POD_NAME -- mongo --eval="printjson(db.test.insert({key1: 'value1'}))"



3. One can fetch the keys stored in the primary or any of the slave nodes in the following manner.

 POD_NAME must be replaced by the name of the pod being queried.



 $ kubectl exec --namespace default POD_NAME -- mongo --eval="rs.slaveOk(); db.test.find().forEach(printjson)"