Encountered an error while scaling out TiCDC. Does anyone know the reason?

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 扩容ticdc遇到的报错 有大佬知道什么原因吗

| username: TiDBer_w0G4KWzg

[Test Environment for TiDB]
Error: failed to fetch cpu-arch or kernel-name: executor.ssh.execute_failed: Failed to execute command over SSH for ‘root@192.168.2.5:22’ {ssh_stderr: , ssh_stdout: , ssh_command: export LANG=C; PATH=$PATH:/bin:/sbin:/usr/bin:/usr/sbin uname -m}, cause: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

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| username: tidb菜鸟一只 | Original post link

Is it logged in using a password, key, or passwordless method? First, try SSH logging into the machine at root@192.168.2.5:22 to check.

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| username: TiDBer_w0G4KWzg | Original post link

Through password

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| username: cassblanca | Original post link

Each machine should first SSH login to each other.

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| username: TiDBer_w0G4KWzg | Original post link

I added the password, no error reported, but it still didn’t succeed.

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| username: 有猫万事足 | Original post link

It might be because your password contains special characters, such as !@.
Just use -p
When prompted, just paste the password in.

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| username: tidb菜鸟一只 | Original post link

-u root -p
Don’t enter the password yet, wait until the interactive prompt to enter the password.

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| username: redgame | Original post link

The SSH service is not started or configured incorrectly. Please confirm whether the SSH service on the target host has been started correctly.

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| username: cassblanca | Original post link

I feel like you didn’t enter the command correctly. The syntax is: tiup cluster scale-out <topology.yaml> [flags]