<p>I am trying to setup kubernetes cluster in AWS using KOPS. I configured for 3 master nodes and 6 nodes. But after launching the cluster only two master nodes are up.</p>

<p>I am using <code>.k8s.local</code> DNS instead of Purchased DNS. Below is the script that I am using for creating the cluster.</p>

<pre><code>kops create cluster \
--cloud=aws \
--name=kops-cassandra-cluster-01.k8s.local \
--zones=ap-south-1a,ap-south-1b,ap-south-1c \
--master-size="t2.small" \
--master-count 3 \
--master-zones=ap-south-1a,ap-south-1b,ap-south-1c \
--node-size="t2.small" \
--ssh-public-key="kops-cassandra-cluster-01.pub" \
--state=s3://kops-cassandra-cluster-01 \
--node-count=6
</code></pre>

<p>After executing <code>kops update cluster --name=kops-cassandra-cluster-01.k8s.local --state=s3://kops-cassandra-cluster-01 --yes</code> 
only two master nodes are available instead of 3. </p>

<p><code>kubectl get nodes</code> shows:</p>

<pre><code>NAME                                           STATUS   ROLES    AGE   VERSION
ip-172-20-44-37.ap-south-1.compute.internal    Ready    master   18m   v1.12.8
ip-172-20-52-78.ap-south-1.compute.internal    Ready    node     18m   v1.12.8
ip-172-20-60-234.ap-south-1.compute.internal   Ready    node     18m   v1.12.8
ip-172-20-61-141.ap-south-1.compute.internal   Ready    node     18m   v1.12.8
ip-172-20-66-215.ap-south-1.compute.internal   Ready    node     18m   v1.12.8
ip-172-20-69-124.ap-south-1.compute.internal   Ready    master   18m   v1.12.8
ip-172-20-85-58.ap-south-1.compute.internal    Ready    node     18m   v1.12.8
ip-172-20-90-119.ap-south-1.compute.internal   Ready    node     18m   v1.12.8
</code></pre>

<p>I am new to Kubernetes. Am I missing something?</p>

<p>After doing a lot of research I came to know that it is because of t2.small instance type is not available in ap-south-1c. After modifying the zones to eu-west-1a,eu-west-1b,eu-west-1c, I can see 3 master nodes and 6 worker nodes. Thanks @mchawre for your help.</p>
