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Cloud Search Service
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User Guide
- Getting Started
- Creating and Accessing a Cluster
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Managing Elasticsearch Clusters
- Cluster and Storage Capacity Statuses
- Introduction to the Cluster List
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- Binding an Enterprise Project
- Restarting a Cluster
- Migrating Cluster Data
- Deleting a Cluster
- Managing Tags
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API Reference
- Before You Start
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Cluster Management
- Creating a cluster
- Querying the Cluster List
- Querying Cluster Details
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- Renaming a Cluster
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- Restarting a Cluster
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- Adding Instances and Expanding Instance Storage Capacity
- Changing Specifications
- Obtaining the Instance Specifications List
- Querying All Tags
- Querying Tags of a Specified Cluster
- Adding Tags to a Cluster
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- Adding or Deleting Cluster Tags in Batches
- Changing the Specifications of a Specified Node Type
- Scaling In a Cluster by Removing a Specific Node
- Scaling In Nodes of a Specific Type
- Downloading a Security Certificate
- Replacing a Node
- Configuring the Security Mode.
- Adding Independent Masters and Clients
- Changing the Security Group
- Kibana Public Network Access
- Log Management
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Snapshot Management
- (Not Recommended) Automatically Setting Basic Configurations of a Cluster Snapshot
- Modifying Basic Configurations of a Cluster Snapshot
- Manually Creating a Snapshot
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- Configuring the Automatic Snapshot Creation Policy
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FAQs
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Accessing CSS Clusters
- How Do I Reset the Administrator Password of a Security-mode Cluster in CSS?
- Are Ports 9200 and 9300 Open for Access to Elasticsearch Clusters?
- How Do I Use a NAT Gateway to Access CSS from the Internet?
- How Do I Connect In-house Developed Kibana to an Elasticsearch Cluster in CSS?
- How Do I Connect In-house Developed OpenSearch Dashboards to an OpenSearch Cluster in CSS?
- Migrating CSS Clusters
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Using CSS Cluster Search Engines
- Why Are Newly Created Index Shards Allocated to a Single Node in CSS?
- How Do I Create a Type Under an Index in an Elasticsearch 7.x Cluster of CSS?
- How Do I Change the Number of Replicas for Elasticsearch Indexes in CSS?
- What Are the Impacts If an Elasticsearch Cluster of CSS Has Too Many Shards?
- How Do I Check the Number of Shards and Replicas in a CSS Cluster?
- What Does the Value i for node.roles Mean for Nodes in an Elasticsearch Cluster of CSS?
- How Do I Change the Maximum Number of Results Returned for Searches to an Index in an Elasticsearch Cluster of CSS?
- How Do I Update Index Lifecycle Policies for an Elasticsearch Cluster of CSS?
- How Do I Set Slow Query Log Thresholds for an Elasticsearch Cluster of CSS?
- How Do I Clear Elasticsearch Indexes in CSS?
- How Do I Clear Elasticsearch Cache in CSS?
- Why Does the Disk Usage Increase After the delete_by_query Command Was Executed to Delete Data in an Elasticsearch Cluster?
- Do CSS Elasticsearch Clusters Support script dotProduct?
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Managing CSS Clusters
- How Do I Check the AZ Where a CSS Cluster Is Located?
- What Is the Relationship Between the Filebeat Version and Cluster Version in CSS?
- How Do I Obtain the Security Certificate of CSS?
- How Do I Convert the Format of a CER Security Certificate in CSS?
- Can I Modify the Security Group for Elasticsearch and OpenSearch Clusters in CSS?
- How Do I Set search.max_buckets for an Elasticsearch Cluster of CSS?
- Can I Modify the TLS Algorithm of an Elasticsearch or OpenSearch Cluster in CSS?
- How Do I Enable Audit Logs for an Elasticsearch or OpenSearch Cluster of CSS?
- Can I Stop a CSS Cluster?
- How Do I Query the Index Size on OBS After the Freezing of Indexes for a CSS Cluster?
- How Do I Check the List of Default Plugins for Elasticsearch and OpenSearch Clusters?
- CSS Cluster Backup and Restoration
- CSS Cluster Monitoring and O&M
- Troubleshooting
- Videos
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Replacing a Specified Node
Updated on 2023-03-15 GMT+08:00
If a node in the cluster is faulty, you can create a new node with the same specifications to replace it.
Prerequisites
The target cluster is available and has no tasks in progress.
Constraints
- Only one node can be replaced at a time.
- The ID, IP address, specifications, and AZ of the new node will be the same as those of the original one.
- The configurations you modified manually will not be retained after node replacement. For example, if you have manually added a return route to the original node, you need to add it to the new node again after the node replacement is complete.
- If the node you want to replace is a data node (ess) or cold data node (ess-cold), pay attention to the following precautions:
- Before a data node or cold data node is replaced, its data needs to be migrated to other nodes. To properly store the data, ensure the maximum sum of replicas and primary shards of an index is smaller than the total number of data nodes (ess and ess-cold nodes) in the cluster. The node replacement duration depends heavily on the migration speed.
- Clusters whose version is earlier than 7.6.2 cannot have closed indexes. Otherwise, data nodes or cold data nodes cannot be replaced.
- The AZ of the node to be replaced must have two or more data nodes (including ess and ess-cold).
- If the cluster of the node to be replaced does not have a master node (ess-master), the number of available data nodes (including ess and ess-cold) in the cluster must be greater than or equal to 3.
- The preceding precautions do not apply if you are replacing a master node (ess-master) or client node (ess-client).
- The precautions 1 to 4 do not apply if you are replacing a faulty node, regardless of its type. Faulty nodes are not included in _cat/nodes.
Procedure
- Log in to the CSS management console.
- In the navigation pane on the left, choose Clusters > Elasticsearch. On the displayed Clusters page, locate the target cluster and choose More > Modify Configuration in the Operation column.
- On the Modify Configuration page, click the Replace Node tab.
- Select the target node.
Figure 1 Replacing a specified node
- Click Submit.
- Click Back to Cluster List to switch to the Clusters page. The Task Status is Upgrading. When Cluster Status changes to Available, the node has been successfully replaced.
Parent topic: Scaling In/Out a Cluster
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