问题
I created DC-OS cluster on azure, after creating with ssh public key I can access to master with the following commands, sudo ssh -v -A -p 2200 user@master-ip -i /root/.ssh/id_rsa
After getting into Master I want to access agents so I copied id_rsa and id_rsa.pub key from host to master node. and run the following command.
ssh -p 22 10.32.0.4 debug1: No more authentication methods to try. Permission denied (public key)
but unfortunately it will give following error, I have tried so many ways but didn't ssh into the salve.
回答1:
We can follow those steps to SSH agent:
1.Upload private key to master, I upload private key(222222) to this directory:
root@dcos-master-B9E522B-0:/home/jason/.ssh# pwd
/home/jason/.ssh
root@dcos-master-B9E522B-0:/home/jason/.ssh# ls
222222 authorized_keys known_hosts
root@dcos-master-B9E522B-0:/home/jason/.ssh#
2.change permission for this private key, change to 600:
jason@dcos-master-B9E522B-0:~/.ssh$ ll -a
total 20
drwx------ 2 jason jason 4096 Apr 27 02:39 ./
drwxr-xr-x 4 jason jason 4096 Apr 27 02:39 ../
-rw-rw-r-- 1 jason jason 1675 Apr 27 02:38 222222
-rw------- 1 jason jason 381 Apr 27 02:17 authorized_keys
-rw-r--r-- 1 jason jason 222 Apr 27 02:35 known_hosts
jason@dcos-master-B9E522B-0:~/.ssh$ chmod 600 222222
3.Use this key to SSH agent:
jason@dcos-master-B9E522B-0:~/.ssh$ ssh jason@10.32.0.4 -i /home/jason/.ssh/222222
ssh: /opt/mesosphere/lib/libcrypto.so.1.0.0: no version information available (required by ssh)
ssh: /opt/mesosphere/lib/libcrypto.so.1.0.0: no version information available (required by ssh)
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-28-generic x86_64)
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0 packages can be updated.
0 updates are security updates.
The programs included with the Ubuntu system are free software;
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To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
jason@dcos-agent-private-B9E522B000000:~$
Note:
1.We can use CLI 2.0 to find the VMSS' instance admin user name, the name same as your master admin user:
C:\Users>az vmss list-instances -n "dcos-agent-private-B9E522B-vmss0" -g dcos
"osProfile": {
"adminPassword": null,
"adminUsername": "jason",
"computerName": "dcos-agent-private-B9E522B000000",
2.Also we should check the private key permission, we should set it to 600.
3.Make sure .ssh directory permission is 700 or 755.
drwx------ 2 jason jason 4096 Apr 27 02:39 .ssh/
来源：https://stackoverflow.com/questions/43638792/how-to-login-into-dc-os-slave-through-master