Differences

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--- elasticsearch [2020/08/10 02:35] – external edit 127.0.0.1
+++ elasticsearch [2021/01/25 23:41] (current) – [Quick Commands] k2patel
@@ Line 5: / Line 5: @@
 <code bash>
 curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'
-</code>
-== Node Information ==
-<code bash>
-curl -XGET 'http://localhost:9200/_nodes?pretty=true'
 </code>
@@ Line 20: / Line 15: @@
 <code bash>
 curl -XGET 'http://localhost:9200/_cat/shards'
+</code>
+== Unassigned shard | timeout ==
+**Try restarting**
+<code bash>
+curl -XPOST -k https://admin:<password>@<hostname>:9200/_cluster/reroute?retry_failed=true --CApath /etc/elasticsearch/root-ca-key.pem
+</code>
+**List indexes not assigned**
+<code bash>
+curl -k --CApath /etc/elasticsearch/root-ca-key.pem -XGET https://admin:<password>@<hostname>:9200/_cat/shards?h=index,shard,prirep,state,unassigned.reason | grep -i UNASSIGNED
+</code>
+**Detailed information on issue**
+<code bash>
+curl -k --CApath /etc/elasticsearch/root-ca-key.pem -XGET https://admin:<password>@<hostname>:9200/_cluster/allocation/explain?pretty
 </code>
@@ Line 31: / Line 40: @@
 curl -XDELETE 'http://localhost:9200/*.reindex'
 </code>
+== Disk usage issue ==
+When free disk space fall cluster fails.
+<code bash>
+curl -H 'Content-Type: application/json' -X PUT -d '{
+  "transient": {
+    "cluster.routing.allocation.disk.watermark.low": "89%",
+    "cluster.routing.allocation.disk.watermark.high": "94%",
+   "cluster.info.update.interval": "1m"
+  }
+}' http://localhost:9200/_cluster/settings
+</code>
 ==== Templates ====
@@ Line 123: / Line 146: @@
     }
 }'
+</code>
+==== Rolling Upgrade ====
+:!: This should work on elastic.co but my steps are mainly taken from the Opendistro.
+=== Set the cluster in upgrade mode ===
+<code bash>
+curl -k -XPOST https://admin:<password>@<hostname>:9200/_ml/set_upgrade_mode?enabled=true
+</code>
+=== Disable sharding ===
+<code bash>
+curl -k -H 'Content-Type: application/json' -XPUT -d '{
+"persistent": {
+    "cluster.routing.allocation.enable": "primaries"
+  }
+}' https://admin:<password>@<hostname>:9200/_cluster/settings --CApath /etc/elasticsearch/root-ca-key.pem
+</code>
+=== Flush / Sync data on all host in cluster ===
+<code bash>
+curl -k -XPOST https://admin:<password>@<hostname>:9200/_flush/synced --CApath /etc/elasticsearch/root-ca-key.pem
+</code>
+=== Stop / Upgrade / start Services ===
+<code bash>
+systemctl stop kibana.service
+systemctl stop elasticsearch.service
+dnf install opendistroforelasticsearch-1.12.0 -y
+dnf install opendistroforelasticsearch-kibana-1.12.0 -y
+systemctl start elasticsearch.service
+systemctl start kibana.service
+</code>
+=== Enable Sharding ===
+<code bash>
+curl -k -H 'Content-Type: application/json' -XPUT -d '{
+"persistent": {
+    "cluster.routing.allocation.enable": "all"
+  }
+}' https://admin:<password>@<hostname>:9200/_cluster/settings --CApath /etc/elasticsearch/root-ca-key.pem
+</code>
+==== Node Information ====
+=== List all nodes and important information ===
+:!:[[https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-nodes.html | Document Ref.]]
+<code bash>
+curl -XGET -k https://admin:<password>@<hostname>:9200/_cat/nodes?v=true\&h=id,ip,port,v,m,hp,l,r,j,fdc,fdm
 </code>