title: 503 Service Unavailable - Master not discovered error in AKS
body: <p>I have a AKS cluster (k1) with 3 nodes. I have deployed ECK operator using all_in_one.yaml.
  I have another AKS cluster(k2) which is running my application stack , i have installed filebeats in this cluster (k2) and it is shipping the logs to elasticsearch to another k8s cluster (k1).
  My k2 cluster configuration is 3 nodes (4 vCPU, 16 GiB RAM , 32GiB Temp Storage).
  My elasticsearch.yaml:</p>
  <pre><code>apiVersion: elasticsearch.k8s.elastic.co/v1
  kind: Elasticsearch
  metadata:
    name: dev-elasticsearch
  spec:
    version: 7.9.2
    http:
      # Disable https
      tls:
        selfSignedCertificate:
          disabled: true
      service:
        spec:
          type: LoadBalancer
    nodeSets:
    - name: default
      count: 3
      config:
        node.master: true
        node.data: true
        node.store.allow_mmap: false
        xpack.security.enabled: true
        discovery.seed_hosts:
           - 10.x.x.x
           - 10.x.x.x
           - 10.x.x.x
  </code></pre>
  <p>Note : When i start the start es and kibana , everything works fine for about 30 mins and then i have service unavailable error in es
  <code>{&quot;error&quot;:{&quot;root_cause&quot;:[{&quot;type&quot;:&quot;master_not_discovered_exception&quot;,&quot;reason&quot;:null}],&quot;type&quot;:&quot;master_not_discovered_exception&quot;,&quot;reason&quot;:null},&quot;status&quot;:503}</code></p>
  <p>Another thing i noticed is elastic-internal-init-filesystem is in Terminated state.</p>
  <ol>
  <li>Can someone help me resolve this issue ?</li>
  <li>Also how can i write the logs to a az storage with more space instead on default PV ?</li>
  </ol>
  <p>Thanks for your help !!</p>