Question

0

running systemctl via ssh without asking for password

rated 0 times [ 0] [ 0] / answers: 1 / hits: 499 / 1 Year ago, sun, december 11, 2022, 2:43:18

I want to run ssh without asking for password and invoke systemctl without password
i tried doing the following:

ssh -t <user>@<host> "echo <password> | sudo -S systemctl status kubelet"

and:

sshpass -p '$<password>' ssh -t -o 'StrictHostKeyChecking=no' <user>@<host> 'sudo service kubelet restart

also:

 echo <password> | ssh -tt <user>@<host> "sudo service kubelet restart"

i added the user to the sudoers and i am able to run systemctl without password
all the commands from above ask for a password except:

sshpass -p '$<password>' ssh -t -o 'StrictHostKeyChecking=no' <user>@<host> 'sudo service kubelet restart

which gives me no prompt and looks like it worked but did nothing.

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llael

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answered 1 Year ago itagde · Accepted Answer

I used python3 for this solution, and tho not elegant but it works(this is not the full script but only the relevant part).

initiate_restart = [

    "echo <password> | sudo -S systemctl restart kubelet",

    "echo <password> | sudo -S systemctl restart docker",

]

node = paramiko.SSHClient()

print(node)

node.set_missing_host_key_policy(paramiko.AutoAddPolicy())

try:

    node.connect(hostname=get_ip, username=user_name, password=node_pass)

    with open("/tmp/reset_log.log", "a") as f:

        f.write(date + ' Restarting ' + 'Node-' + get_ip + "

")

except:

    print("[!] Cannot connect to the SSH Server")

    with open("/tmp/reset_log.log", "a") as f:

        f.write(date + ' Could not connect to' + ' Node-' + get_ip + "

")

    exit()

for command in initiate_restart:

    print("="*50, command, "="*50)

    stdin, stdout, stderr = node.exec_command(command)

    print(stdout.read().decode())

    err = stderr.read().decode()

    if err:

        print(err)