title: Elasticsearch 7.10 : How to safely remove a node and free up space?
body: <p>As I am running out of my disk space, I want to remove all the indices from the node. Note that I have just one node, and I am running the elastic server on my local machine.</p>
  <p>Basically, when I start the elastic server, it fails with the following log -</p>
  <pre><code>[2020-12-13T22:06:51,839][WARN ][o.e.c.r.a.DiskThresholdMonitor] [sedna] flood stage disk watermark [95%] exceeded on [k7t835EJQ6KzPu-7a-aW8Q][sedna][/home/ssahoo/elasticsearch-7.10.0/data/nodes/0] free: 879mb[0.8%], all indices on this node will be marked read-only
  </code></pre>
  <p>While on the terminal I get the following error -</p>
  <pre><code>Could not rename log file 'logs/gc.log' to 'logs/gc.log.05' (Reserved).
  (base) ssahoo@sedna:~/elasticsearch-7.10.0$ [2020-12-14T17:07:17,831][WARN ][stderr                   ] [sedna] Exception in thread &quot;main&quot; org.elasticsearch.bootstrap.BootstrapException: java.io.IOException: Input/output error
  2020-12-14 17:07:17,848 main ERROR Unable to move file /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch_server.json to /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.json: java.nio.file.FileSystemException /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch_server.json -&gt; /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.json: Disk quota exceeded
  2020-12-14 17:07:17,852 main ERROR Unable to copy file /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch_server.json to /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.json: java.nio.file.FileSystemException /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.json: Disk quota exceeded
  2020-12-14 17:07:17,857 main ERROR Unable to move file /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch.log to /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.log: java.nio.file.FileSystemException /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch.log -&gt; /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.log: Disk quota exceeded
  2020-12-14 17:07:17,861 main ERROR Unable to copy file /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch.log to /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.log: java.nio.file.FileSystemException /home/ssahoo/elasticsearch-7.10.0/logs/elasticsearch-2020-12-13-1.log: Disk quota exceeded
  [2020-12-14T17:07:17,863][WARN ][stderr                   ] [sedna] Likely root cause: java.io.IOException: Input/output error
  [2020-12-14T17:07:17,864][WARN ][stderr                   ] [sedna]     at java.base/java.io.FileDescriptor.close0(Native Method)
  [2020-12-14T17:07:17,864][WARN ][stderr                   ] [sedna]     at java.base/java.io.FileDescriptor.close(FileDescriptor.java:297)
  </code></pre>
  <p>Therefore I want to free up space by removing all the indices, and therefore the node. So how can I remove the single node that I have?</p>
  <p>Or if may I ask what would your suggestion be to overcome this? I can't afford additional disk space and is my major constraint.</p>
  <p>Thank you.</p>