How to setup a Jenkins slave with ssh private key
(Key file version, directly assign)
Jing, mqjing@gmail.com
Quick Guide (4 steps)
ETA: 10 mins
[Slave Machine]
# init: [Slave] Create Account for Autobuild
slave:~$ sudo adduser jing_autobuild
# Step 1: Create Private Key and Public Key
slave:~$ ssh-keygen -t rsa -C "The access key for the slave Jing"
(note: Enter passphrase)
Output:
private key: id_rsa # copy to master
public key: id_rsa.pub # copy to slave (.ssh/authorized_keys)
# Step 2: Setup the Key-pair
(a) Create the authorized key
slave:~$ cat id_rsa.pub >> ~/.ssh/authorized_keys
# Step 2 (b) Copy the private key to the master
master:~/.ssh$ scp jing_autobuild@127.0.0.1:.ssh/id_rsa jing_slave_privatekey
# Step 3: Setup the Credential
[Manage Jenkins] -> [Manage Credential] -> [Add Credentials]:
Select: SSH Username with private key
Select: From the file on Jenkins master
Info
File: /var/lib/jenkins/.ssh/jing_slave_privatekey
# Step 4: Create Node
[Manage Jenkins] -> [Manage Node] -> [New Node]
Info
Remote FS root: /home/jing_autobuild
Host:
Credentials:
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Detail
You are on slave machine
slave:~$ ssh-keygen -t rsa -C "The access key for the slave Jing"
Output:
private key: id_rsa # for jenkins master to connect this slave
public key: id_rsa.pub # for this slave to verify the connection from jenkins master
Note: You should enter a strong passphrase for your key. If you do not use passphrase, anyone can commit your codes when the keys were stolen.
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example:
Step 2: Setup the public key as the authorized key for verifying the credential key from the master
You are on slave machine
slave:~$ cat id_rsa.pub > ~/.ssh/authorized_keys
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example:
Step 3: Setup the the credential key
You are on the Jenkins master
[Manage Jenkins] -> [Manage Credential] -> [Add Credentials]:
Select: SSH Username with private key
Setup the username and key
Username: the username for access the slave machine
Key: From a file on Jenkins master
Step 1: copy the private key from slave to jenkins master
# You are on the master machine
master:~/.ssh$ scp jing_autobuild@127.0.0.1:.ssh/id_rsa jing_slave_privatekey
ex:
Step 2: set up the private key file
Setup the credential for the node
[Manage Jenkins] -> [Manage Node] -> select node -> [Configure]
Result
