Hi all,
I’m Jenkins newbie
I have jenkins and ssh-agent running with docker compose as below
version: "3"
services:
jenkins:
image: jenkins/jenkins:2.430-jdk21
container_name: jenkins
environment:
- TZ=Asia/Ho_Chi_Minh
ports:
- "8080:8080"
volumes:
- ./jenkins_home:/var/jenkins_home
- ./kubectl:/usr/local/bin/kubectl
networks:
- jenkins-net
jenkins-agent-docker:
image: jenkins/ssh-agent:jdk21
container_name: jenkins-agent-docker
#user: 1000:1000
environment:
- TZ=Asia/Ho_Chi_Minh
#- JENKINS_AGENT_SSH_PUBKEY=
- JENKINS_AGENT_SSH_PUBKEY=ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCz/9DTzHY/uSF58WpHpZQ2wTgphA2FWGFX/g9xYSFPhctqO67/sU9Uq8li1wIOWJ9f89JERq8p7+CaSVoyl7/PC3LG9T63IspKsPm4XKviZ9RiuvIILfcbJ6f9QO7HS4qoEmKGIZaZtahuxMdqvorJAK+h4uxGuk7BMMabktk3Kf6Qf5KaH/B/HTZpBnTMucwYWx2eHFl2uH78pFqffZDq4ZDKBcBBRWgSzMSPrCqOOwuFOxjeAGezDsBIxNDVqd56t8LLl/mtuqZeD1P9Wwm3KhrdgwtMGN0MwujYP2oD/sbeGa4iuqMkGEX9pY4cFh+IoD/fu6w1cpgv6xXaXMGD
ports:
- "22:22"
networks:
- jenkins-net
networks:
jenkins-net:
driver: bridge
name: jenkins-net
My jenkins server’s ip is 192.168.7.112
From my computer I can ssh to jenkins ssh agent container as below
ssh -i private_key jenkins@192.168.7.112
Linux ae2efc3d9fc4 5.19.0-45-generic #46-Ubuntu SMP PREEMPT_DYNAMIC Wed Jun 7 09:08:58 UTC 2023 x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
jenkins@ae2efc3d9fc4:~$
From Jenkins UI , I added credential “docker-agent1” (SSH Username with private key) , as below
Then from Manage Jenkins → Nodes , I created “docker-agent1”
When I launch agent , I get error as below
SSHLauncher{host='192.168.7.112', port=22, credentialsId='docker-agent1', jvmOptions='', javaPath='', prefixStartSlaveCmd='', suffixStartSlaveCmd='', launchTimeoutSeconds=60, maxNumRetries=10, retryWaitTime=15, sshHostKeyVerificationStrategy=hudson.plugins.sshslaves.verifiers.ManuallyTrustedKeyVerificationStrategy, tcpNoDelay=true, trackCredentials=true}
[11/22/23 13:48:02] [SSH] Opening SSH connection to 192.168.7.112:22.
[11/22/23 13:48:02] [SSH] SSH host key matches key seen previously for this host. Connection will be allowed.
ERROR: Server rejected the 1 private key(s) for jenkins (credentialId:docker-agent1/method:publickey)
ERROR: Failed to authenticate as jenkins with credential=docker-agent1
java.io.IOException: Publickey authentication failed.
at com.trilead.ssh2.auth.AuthenticationManager.authenticatePublicKey(AuthenticationManager.java:349)
at com.trilead.ssh2.Connection.authenticateWithPublicKey(Connection.java:472)
at com.cloudbees.jenkins.plugins.sshcredentials.impl.TrileadSSHPublicKeyAuthenticator.doAuthenticate(TrileadSSHPublicKeyAuthenticator.java:110)
at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.authenticate(SSHAuthenticator.java:431)
at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.authenticate(SSHAuthenticator.java:468)
at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:878)
at hudson.plugins.sshslaves.SSHLauncher.lambda$launch$0(SSHLauncher.java:434)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.io.IOException: Could not generate signature
at com.trilead.ssh2.signature.KeyAlgorithm.generateSignature(KeyAlgorithm.java:43)
at com.trilead.ssh2.auth.AuthenticationManager.authenticatePublicKey(AuthenticationManager.java:316)
... 10 more
Caused by: java.security.SignatureException: Could not sign data
at java.base/sun.security.rsa.RSASignature.engineSign(RSASignature.java:196)
at java.base/java.security.Signature$Delegate.engineSign(Signature.java:1410)
at java.base/java.security.Signature.sign(Signature.java:713)
at com.trilead.ssh2.signature.KeyAlgorithm.generateSignature(KeyAlgorithm.java:41)
... 11 more
Caused by: javax.crypto.BadPaddingException: RSA private key operation failed
at java.base/sun.security.rsa.RSACore.crtCrypt(RSACore.java:209)
at java.base/sun.security.rsa.RSACore.rsa(RSACore.java:130)
at java.base/sun.security.rsa.RSASignature.engineSign(RSASignature.java:193)
... 14 more
[11/22/23 13:48:02] [SSH] Authentication failed.
Authentication failed.
[11/22/23 13:48:02] Launch failed - cleaning up connection
[11/22/23 13:48:02] [SSH] Connection closed.
How can I fixed it, please give me some advice, thank you very much.
