How Do I Troubleshoot Problems Occurred When Accepting Nodes into a CCE Cluster?

Overview

This section describes how to troubleshoot the problems occurred when you accept or add existing ECSs to a CCE cluster.

• While an ECS is being accepted into a cluster, the operating system of the ECS will be reset to the standard OS image provided by CCE to ensure node stability. The CCE console prompts you to select the operating system and the login mode during the reset.
• The ECS system and data disks will be formatted while the ECS is being accepted into a cluster. Ensure that data in the disks has been backed up.
• While an ECS is being accepted into a cluster, do not perform any operation on the ECS through the ECS console.

Notes and Constraints

• The cluster version must be 1.15 or later.
• If IPv6 is enabled for a cluster, only nodes in a subnet with IPv6 enabled can be accepted and managed. If IPv6 is not enabled for the cluster, only nodes in a subnet without IPv6 enabled can be accepted.
• If a password or key has been set when the original VM node was created, reset the password or key during management. The original password or key will become invalid.
• Data disks that have been partitioned will be ignored during node management. Ensure that there is at least one unpartitioned data disk meeting the specifications is attached to the node.

Prerequisites

A cloud server that meets the following conditions can be accepted:

• The node to be accepted must be in the Running state and not used by other clusters. In addition, the node to be accepted does not carry the CCE-Dynamic-Provisioning-Node tag.
• The node to be accepted and the cluster must be in the same VPC. (If the cluster version is earlier than v1.13.10, the node to be accepted and the CCE cluster must be in the same subnet.)
• Data disks must be attached to the nodes to be managed. A local disk (disk-intensive disk) or a data disk of at least 20 GiB can be attached to the node, and any data disks already attached cannot be smaller than 10 GiB.
• The node to be accepted has 2-core or higher CPU, 4 GiB or larger memory, and only one NIC.
• Only cloud servers with the same specifications, AZ, and data disk configuration can be added in batches.

Procedure

View the cluster log information to locate the failure cause and rectify the fault.

1. Log in to the CCE console. In the navigation pane, click Operation Records above the cluster list to view operation records.
2. Click the record of the Failed status to view error information.
3. Rectify the fault based on the error information and accept the node into a cluster again.

Common Issues

If a node fails to be managed, a message will be displayed, indicating that the disk partitioning does not work:

Install config-prepare failed: exit status 1, output: [ Mon Jul 17 14:26:10 CST 2023 ] start install config-prepare\nNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT\nsda 8:0 0 40G 0 disk \n└─sda1 8:1 0 40G 0 part /\nsdb 8:16 0 100G 0 disk \n└─sdb1 8:17 0 100G 0 part
disk /dev/sda has been partition, will skip this device\nRaw disk /dev/sdb has been partition, will skip this device\nwarning: selector can not match any evs volume

To resolve this issue, attach an unpartitioned data disk of 20 GiB or higher to the node. After the node is managed, the unpartitioned data disk is used to store the container engine and kubelet. You can perform operations on the partitioned data disk that does not work as required.