Environment details
Jenkins setup: Jenkins: 2.426.1 OS: Linux - 6.2.0-37-generic Java: 17.0.9 - Eclipse Adoptium (OpenJDK 64-Bit Server VM) --- ace-editor:1.1 ant:497.v94e7d9fffa_b_9 antisamy-markup-formatter:162.v0e6ec0fcfcf6 apache-httpcomponents-client-4-api:4.5.14-208.v438351942757 apache-httpcomponents-client-5-api:5.2.2-1.0 authentication-tokens:1.53.v1c90fd9191a_b_ bootstrap5-api:5.3.2-2 bouncycastle-api:2.29 branch-api:2.1135.v8de8e7899051 build-timeout:1.31 caffeine-api:3.1.8-133.v17b_1ff2e0599 checks-api:2.0.2 cloud-stats:320.v96b_65297a_4b_b_ cloudbees-folder:6.858.v898218f3609d command-launcher:107.v773860566e2e commons-lang3-api:3.13.0-62.v7d18e55f51e2 commons-text-api:1.11.0-94.v3e1f4a_926e49 credentials:1309.v8835d63eb_d8a_ credentials-binding:642.v737c34dea_6c2 display-url-api:2.200.vb_9327d658781 docker-commons:439.va_3cb_0a_6a_fb_29 docker-java-api:3.3.1-79.v20b_53427e041 docker-plugin:1.5 durable-task:523.va_a_22cf15d5e0 echarts-api:5.4.3-1 email-ext:2.102 font-awesome-api:6.4.2-1 git:5.2.1 git-client:4.5.0 github:1.37.3.1 github-api:1.318-461.v7a_c09c9fa_d63 github-branch-source:1751.v90e17c48a_6a_c gradle:2.9 instance-identity:185.v303dc7c645f9 ionicons-api:56.v1b_1c8c49374e jackson2-api:2.15.3-372.v309620682326 jakarta-activation-api:2.0.1-3 jakarta-mail-api:2.0.1-3 javax-activation-api:1.2.0-6 javax-mail-api:1.6.2-9 jaxb:2.3.9-1 jdk-tool:73.vddf737284550 jjwt-api:0.11.5-77.v646c772fddb_0 jquery3-api:3.7.1-1 jsch:0.2.8-65.v052c39de79b_2 junit:1240.vf9529b_881428 ldap:711.vb_d1a_491714dc mailer:463.vedf8358e006b_ mapdb-api:1.0.9-28.vf251ce40855d matrix-auth:3.2.1 matrix-project:818.v7eb_e657db_924 mina-sshd-api-common:2.11.0-86.v836f585d47fa_ mina-sshd-api-core:2.11.0-86.v836f585d47fa_ okhttp-api:4.11.0-157.v6852a_a_fa_ec11 pam-auth:1.10 pipeline-build-step:516.v8ee60a_81c5b_9 pipeline-github-lib:42.v0739460cda_c4 pipeline-graph-analysis:202.va_d268e64deb_3 pipeline-groovy-lib:689.veec561a_dee13 pipeline-input-step:477.v339683a_8d55e pipeline-milestone-step:111.v449306f708b_7 pipeline-model-api:2.2151.ve32c9d209a_3f pipeline-model-definition:2.2151.ve32c9d209a_3f pipeline-model-extensions:2.2151.ve32c9d209a_3f pipeline-rest-api:2.34 pipeline-stage-step:305.ve96d0205c1c6 pipeline-stage-tags-metadata:2.2151.ve32c9d209a_3f pipeline-stage-view:2.34 plain-credentials:143.v1b_df8b_d3b_e48 plugin-util-api:3.6.0 popper2-api:2.11.6-4 resource-disposer:0.23 scm-api:683.vb_16722fb_b_80b_ script-security:1281.v22fb_899df1a_e snakeyaml-api:2.2-111.vc6598e30cc65 ssh-credentials:308.ve4497b_ccd8f4 ssh-slaves:2.916.vd17b_43357ce4 sshd:3.312.v1c601b_c83b_0e structs:325.vcb_307d2a_2782 subversion:2.17.3 timestamper:1.26 token-macro:384.vf35b_f26814ec trilead-api:2.84.v72119de229b_7 variant:60.v7290fc0eb_b_cd workflow-aggregator:596.v8c21c963d92d workflow-api:1283.v99c10937efcb_ workflow-basic-steps:1042.ve7b_140c4a_e0c workflow-cps:3806.va_3a_6988277b_2 workflow-durable-task-step:1289.v4d3e7b_01546b_ workflow-job:1360.vc6700e3136f5 workflow-multibranch:756.v891d88f2cd46 workflow-scm-step:415.v434365564324 workflow-step-api:639.v6eca_cd8c04a_a_ workflow-support:865.v43e78cc44e0d ws-cleanup:0.45
I’m trying out Jenkins and its been fun so far. I’ve been able to build a pipeline, pair it to my Github etc. Now I am trying to create an agent and connect with my controller but I’m getting connection refused.
My Jenkins controller is hosted locally on a docker container and I have a container running for the agent as well. I used this doc for reference: Using Jenkins agents
I suspect maybe a SSH service issue or maybe my ssh keys are messed up. Although the sshd is running on the agent:
43b3773b:/home/jenkins/.ssh# ps -ef
PID USER TIME COMMAND
1 root 0:00 sshd: /usr/sbin/sshd -D -e [listener] 0 of 10-100 startups
And I have the jenkins controller pub key in authorized_keys:
a81443b3773b:/home/jenkins# cat .ssh/authorized_keys
ssh-rsa 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 jenkins@4cfbfa97f71d
This is the command I used to start the agent:
docker run -d --rm --name=agent1 -p 4444:22 -e "JENKINS_AGENT_SSH_PUBKEY=ssh-rsa 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 jenkins@4cfbfa97f71d" jenkins/ssh-agent:alpine-jdk17
The pubkey is of my Jenkins controller.
On my localhost port 4444 is open.
This is the error I get in Jenkins agent log:
SSHLauncher{host='0.0.0.0', port=4444, credentialsId='jenkins2', jvmOptions='', javaPath='', prefixStartSlaveCmd='', suffixStartSlaveCmd='', launchTimeoutSeconds=60, maxNumRetries=10, retryWaitTime=2, sshHostKeyVerificationStrategy=hudson.plugins.sshslaves.verifiers.ManuallyTrustedKeyVerificationStrategy, tcpNoDelay=true, trackCredentials=true}
[12/04/23 18:42:20] [SSH] Opening SSH connection to 0.0.0.0:4444.
Connection refused
SSH Connection failed with IOException: "Connection refused", retrying in 2 seconds. There are 10 more retries left.
Connection refused
Here are my containers btw:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a81443b3773b jenkins/ssh-agent:alpine-jdk17 "setup-sshd" 48 minutes ago Up 41 minutes 0.0.0.0:4444->22/tcp, :::4444->22/tcp agent1
4cfbfa97f71d jenkins/jenkins:lts "/usr/bin/tini -- /u…" 5 days ago Up 55 minutes 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp brave_pascal
Any help is greatly appreciated 