"priority": 100, #Priority can be set from 0 to 100 "index_patterns": [ #This ISM policy attaches to all indices for the index pattern and you can mention your index pattern here "name": "delete", #Indices moved to delete state "min_index_age": “50m” #Note that after 50 minutes index will transit from hot_state to delete state "default_state": "example_hot_state", #Default state "description": "A simple default policy that deletes old unused indices“, The following example ISM policy deletes indices after 50 minutes: PUT _plugins/_ism/policies/delete_ism_policy The rollover operation rolls over a target to a new index when an existing index meets the defined condition. For example, you can use a rollover operation and an ISM policy to automate deletion of old indices based on conditions, such as index size. With ISM, you can define custom management policies that help you maintain issues, such as low disk space. ISM allows you to automate routine tasks and then apply them to indices and index patterns in OpenSearch Service. To delete multiple indices, run the following command: DELETE cwl-index-* Use ISM to manage low storage space To delete single indices, run the following command: DELETE You can check the indices creation date with the following command: GET _cat/indices?h=h,s,i,id,p,r,dc,dd,ss,&s=:desc Delete any unwanted indices from your OpenSearch Service cluster.Scale up the instance type to obtain more storage space.Add more nodes to your OpenSearch Service cluster.If you're using Amazon EC2 I3 instances for data storage, then take one of the following actions: If your domain uses Amazon Elastic Compute Cloud (Amazon EC2) I3 instances for data storage Note: You must have a manual snapshot repository set up to create any backups. You can also use ISM to rotate indices in OpenSearch Service. Or, you can use Curator to rotate data in OpenSearch Service (from the Python Package Index website). Then, delete the indices from your OpenSearch Service cluster to free up disk space. Create a backup of unwanted indices to your Amazon Simple Storage Service (Amazon S3) bucket.For more information about EBS volumes, see EBS volume size quotas. If you can't increase the size of the EBS volumes, then add nodes or scale up your domain and choose a new EBS limit.For example, 512 GiB is the maximum volume size for Elasticsearch version 1.5. The maximum volume size depends on the node's instance type or Elasticsearch version type. If the domain uses EBS volumes for storage, take one of the following actions: If your domain uses EBS volumes for data storage Or you can update the number of data nodes.ĥ. Note: If you're using an Amazon EBS volume for storage, then update your Storage configuration settings. Choose the domain that you want to add storage to. From the navigation pane, under Managed clusters, choose Domains.ģ. To update your OpenSearch Service domain configuration settings, complete the following steps:Ģ. Use the cat allocation (from the Elastic website) command to check how much storage space is available for each node in your cluster: curl -XGET "es_endpoint/_cat/allocation?v" Also, make sure that your dedicated primary node type is the recommended node type. Important: Before you update your configuration settings, verify the configuration changes that can initiate a blue/green deployment. Resolution Updating your storage configuration settings Use Amazon CloudWatch metrics to monitor the amount of available storage in your cluster.Use Index State Management (ISM) to manage low storage space.It's a best practice to configure at least one replica for each index. Note: Reducing the domain's replica count can reduce fault tolerance. You can delete unnecessary files, optimize old indices, or reduce the domain's replica count. Reduce the amount of data that's stored in your domain.You can also add more cluster nodes to the OpenSearch Service domain. Increase the size of the domain's Amazon Elastic Block Store (Amazon EBS) volumes.Update your cluster sharding strategy so that shards are evenly distributed across all nodes.To resolve low storage space issues, complete the following steps: For more information about OpenSearch Service storage space requirements, see Calculating storage requirements. Also, operating systems such as Linux reserve 5% of the file system to support any critical processes performed by the root user. For example, when you allocate storage to a cluster node, up to 20% of that space (20 GB) is reserved space. The ClusterBlockException error might occur because your OpenSearch Service domain ran out of storage space. Your OpenSearch Service domain has storage space requirements for processing workloads.
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