unable to login to jenkins(Unlock Jenkins)

in my case the Jenkins was not unlocking with initial Admin password, then I thought of setting it up initially with Apache and then proceed with fixing the problem . The problem was in the number of slashes you put after ProxyPass and ProxyPassReverse entries.

Wrong entries

ProxyRequests     OffProxyPreserveHost On<Proxy http://localhost:8081/jenkins*>   Order deny,allow   Allow from all</Proxy>ProxyPass /jenkins http://localhost:8081/jenkins/ nocanonAllowEncodedSlashes NoDecodeProxyPassReverse /jenkins http://localhost:8081/jenkins/ProxyPassReverse /jenkins http://your.hostname.domain/jenkins/RequestHeader set X-Forwarded-Proto "https"RequestHeader set X-Forwarded-Port "443"

Correct one which worked.

ProxyRequests     OffProxyPreserveHost On<Proxy http://localhost:8081/jenkins*>   Order deny,allow   Allow from all</Proxy>ProxyPass /jenkins http://localhost:8081/jenkins nocanonAllowEncodedSlashes NoDecodeProxyPassReverse /jenkins http://localhost:8081/jenkinsProxyPassReverse /jenkins http://your.hostname.domain/jenkinsRequestHeader set X-Forwarded-Proto "https"RequestHeader set X-Forwarded-Port "443"

Let me know your thoughts.

use instructions from https://github.com/geerlingguy/ansible-role-jenkins/issues/50#issuecomment-214935354 and check an update below regarding locking access for anonymous users - worked for me today.

Shamelessly stolen from the link above:

1. Create the file /var/lib/jenkins/jenkins.install.UpgradeWizard.statewith one line 2.0

2. Create the file/var/lib/jenkins/init.groovy.d/basic-security.groovy with thecontents:

   #!groovy

   import jenkins.model.*import hudson.security.*

   def instance = Jenkins.getInstance()

   println "--> creating local user 'admin'"

   def hudsonRealm = new HudsonPrivateSecurityRealm(false)hudsonRealm.createAccount('admin','admin')instance.setSecurityRealm(hudsonRealm)

   def strategy = new FullControlOnceLoggedInAuthorizationStrategy()instance.setAuthorizationStrategy(strategy)instance.save()

you should deploy your jenkins to ......./tomcat/webapps/rootthen the jenkins url should like 'http://localhost:8080/login?from=%2F',when it is done,just copy code in the file ..../initialAdminPassword to Administrator password