title: Kibana server is not ready yet even started
body: <p>i have 1 master node (master), and 1 data node(node-1). 
  Im using centos7 as os.</p>
  
  <h2>master:9200</h2>
  
  <pre><code>[root@localhost kibana]# curl localhost:9200
  {
    "name" : "master",
    "cluster_name" : "elasticsearch",
    "cluster_uuid" : "P4QlwvuRRGSmlT77RroSjA",
    "version" : {
      "number" : "7.6.1",
      "build_flavor" : "default",
      "build_type" : "rpm",
      "build_hash" : "aa751e09be0a5072e8570670309b1f12348f023b",
      "build_date" : "2020-02-29T00:15:25.529771Z",
      "build_snapshot" : false,
      "lucene_version" : "8.4.0",
      "minimum_wire_compatibility_version" : "6.8.0",
      "minimum_index_compatibility_version" : "6.0.0-beta1"
    },
    "tagline" : "You Know, for Search"
  }
  </code></pre>
  
  <h2>node-1:9200</h2>
  
  <pre><code>[root@dev ~]# curl localhost:9200
  {
    "name" : "node-1",
    "cluster_name" : "elasticsearch",
    "cluster_uuid" : "P4QlwvuRRGSmlT77RroSjA",
    "version" : {
      "number" : "7.6.1",
      "build_flavor" : "default",
      "build_type" : "rpm",
      "build_hash" : "aa751e09be0a5072e8570670309b1f12348f023b",
      "build_date" : "2020-02-29T00:15:25.529771Z",
      "build_snapshot" : false,
      "lucene_version" : "8.4.0",
      "minimum_wire_compatibility_version" : "6.8.0",
      "minimum_index_compatibility_version" : "6.0.0-beta1"
    },
    "tagline" : "You Know, for Search"
  }
  </code></pre>
  
  <h2>both node can see each other</h2>
  
  <pre><code>[root@localhost kibana]# curl master:9200/_cluster/health?pretty
  {
    "cluster_name" : "elasticsearch",
    "status" : "yellow",
    "timed_out" : false,
    "number_of_nodes" : 2,
    "number_of_data_nodes" : 2,
    "active_primary_shards" : 27,
    "active_shards" : 27,
    "relocating_shards" : 0,
    "initializing_shards" : 0,
    "unassigned_shards" : 27,
    "delayed_unassigned_shards" : 0,
    "number_of_pending_tasks" : 0,
    "number_of_in_flight_fetch" : 0,
    "task_max_waiting_in_queue_millis" : 0,
    "active_shards_percent_as_number" : 50.0
  }
  </code></pre>
  
  <p>kibana installed on master node.
  systemctl status kibana.
  updated log on kibana</p>
  
  <pre><code>[root@localhost kibana]# systemctl status kibana -l
  ● kibana.service - Kibana
     Loaded: loaded (/etc/systemd/system/kibana.service; enabled; vendor preset: disabled)
     Active: active (running) since Thu 2020-06-04 09:49:15 WIB; 28min ago
   Main PID: 61223 (node)
     CGroup: /system.slice/kibana.service
             └─61223 /usr/share/kibana/bin/../node/bin/node /usr/share/kibana/bin/../src/cli -c /etc/kibana/kibana.yml
  
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["warning","plugins","security","config"],"pid":61223,"message":"Generating a random key for xpack.security.encryptionKey. To prevent sessions from being invalidated on restart, please set xpack.security.encryptionKey in kibana.yml"}
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["warning","plugins","security","config"],"pid":61223,"message":"Session cookies will be transmitted over insecure connections. This is not recommended."}
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["warning","plugins","actions","actions"],"pid":61223,"message":"APIs are disabled due to the Encrypted Saved Objects plugin using an ephemeral encryption key. Please set xpack.encryptedSavedObjects.encryptionKey in kibana.yml."}
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["warning","plugins","alerting","plugins","alerting"],"pid":61223,"message":"APIs are disabled due to the Encrypted Saved Objects plugin using an ephemeral encryption key. Please set xpack.encryptedSavedObjects.encryptionKey in kibana.yml."}
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["info","plugins","monitoring","monitoring"],"pid":61223,"message":"config sourced from: production cluster"}
  Jun 04 09:49:44 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:44Z","tags":["warning","plugins","monitoring","monitoring"],"pid":61223,"message":"X-Pack Monitoring Cluster Alerts will not be available: undefined"}
  Jun 04 09:49:45 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:45Z","tags":["info","savedobjects-service"],"pid":61223,"message":"Waiting until all Elasticsearch nodes are compatible with Kibana before starting saved objects migrations..."}
  Jun 04 09:49:45 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:45Z","tags":["info","plugins","watcher"],"pid":61223,"message":"Your basic license does not support watcher. Please upgrade your license."}
  Jun 04 09:49:45 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:45Z","tags":["info","plugins","monitoring","monitoring","kibana-monitoring"],"pid":61223,"message":"Starting monitoring stats collection"}
  Jun 04 09:49:46 localhost.localdomain kibana[61223]: {"type":"log","@timestamp":"2020-06-04T02:49:46Z","tags":["error","savedobjects-service"],"pid":61223,"message":"This version of Kibana (v7.7.0) is incompatible with the following Elasticsearch nodes in your cluster: v7.6.1 @ 10.64.2.246:9200 (10.64.2.246), v7.6.1 @ 10.64.2.99:9200 (10.64.2.99)"}
  
  </code></pre>
  
  <p>how do we know compatible version between kibana and elastic? i've checked <a href="https://www.elastic.co/support/matrix" rel="nofollow noreferrer">matrix</a> it didnt show what kibana version support what elastic version
  Any kind of respond will be appreciated so much. thank you in advance</p>