Jenkins CI setup on RedHat machine

[Mohamed Sathack]

Hi Everyone,

Good Morning!

I am exploring various options for CI in our project and came across through Hudson and Jenkins. Initial challenge in front of me is to set up everything in a Unix based mode. We have both Unix/Linux based servers.

I need to know Where to start my activity. I have gone through the below link. Jenkins installation and Tomcat configuration has been explained in that link. But I am not sure How to install Jenkins in Unix/Linux machine and which installables I have to use it for installation? For my initial analysis, I will be using Linux machine (RedHat Enterprise Server)

https://wiki.jenkins-ci.org/display/JENKINS/JenkinsLinuxStartupScript

Your suggestions are much appreciated!!!

Regards,

Sathack

[Richard Bywater]

https://wiki.jenkins-ci.org/display/JENKINS/Installing+Jenkins+on+RedHat+distributions ?

Richard.

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[Mohamed Sathack]

Thanks Richard! 

[John Mellor]

Jenkins is a standard rpm package for RedHat-based distros.  Just use yum or dnf to install it normally.  It will install an old-style daemon, so run “/etc/init.d/Jenkins start” for the initial startup.  Give it 30 seconds (it’s a really slow startup cuz its java under tomcat), and browse to port 8080.  Remember to make allowances for /home/Jenkins getting really big.  That’s it, you can now prototype.  Unless you have a java-based product, you probably want a freestyle project, and call a bash or korn script to do the actual build.  Good Luck!

To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/3d599141-0248-49f7-8fdd-f67ca196d914%40googlegroups.com.

[Mohamed Sathack]

Hi John,

I am getting error as below

# sudo wget -O /etc/yum.repos.d/jenkins.repo http://199.193.196.24/redhat/jenkins.repo

--11:14:54--  http://199.193.196.24/redhat/jenkins.repo

Connecting to 199.193.196.24:80... connected.

HTTP request sent, awaiting response... 301 Moved Permanently

Location: http://ci.jenkins-ci.org/redhat/jenkins.repo [following]

--11:14:54--  http://ci.jenkins-ci.org/redhat/jenkins.repo

Resolving ci.jenkins-ci.org... failed: Name or service not known.

Since the domain name is not resolved(not present in hosts file), I am trying to connect with the help of IP Address. It has been resolved(please refer first few lines) and then throwing error at last. Due to this, jenkins.repo is created with '0 kb' as file size.

Regards,

Mohamed Sathack

[Les Mikesell]

On Thu, Feb 19, 2015 at 5:17 AM, Mohamed Sathack <ssa...@gmail.com> wrote:
> Hi John,
>
> I am getting error as below
>
> # sudo wget -O /etc/yum.repos.d/jenkins.repo
> http://199.193.196.24/redhat/jenkins.repo
> --11:14:54-- http://199.193.196.24/redhat/jenkins.repo
> Connecting to 199.193.196.24:80... connected.
> HTTP request sent, awaiting response... 301 Moved Permanently
> Location: http://ci.jenkins-ci.org/redhat/jenkins.repo [following]
> --11:14:54-- http://ci.jenkins-ci.org/redhat/jenkins.repo
> Resolving ci.jenkins-ci.org... failed: Name or service not known.
>
>
> Since the domain name is not resolved(not present in hosts file), I am
> trying to connect with the help of IP Address. It has been resolved(please
> refer first few lines) and then throwing error at last. Due to this,
> jenkins.repo is created with '0 kb' as file size.

Can't you make DNS work on your machine? If not, yum probably isn't
going to work even if you get the repo file installed - and you won't
be able to do normal yum updates to maintain the machine. Your other
option is to download the latest rpm package listed in the 'individual
package downloads" for RedHat using a machine where DNS works,
transfer over to this machine and install with the rpm or yum command.

--
Les Mikesell
lesmi...@gmail.com

[Mohamed Sathack]

Hi,

This time I added an entry into the hosts file and tried again.

I am able to create the repository. But failed while installation

[root@Server_ABC ~]# sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo

--05:31:41--  http://pkg.jenkins-ci.org/redhat/jenkins.repo

Resolving pkg.jenkins-ci.org... 199.193.196.24

Connecting to pkg.jenkins-ci.org|199.193.196.24|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 75 [text/plain]

Saving to: `/etc/yum.repos.d/jenkins.repo'

100%[===============================================================================================================================>] 75          --.-K/s   in 0s

05:31:41 (6.74 MB/s) - `/etc/yum.repos.d/jenkins.repo' saved [75/75]

root@Server_ABC ~]# sudo yum install jenkins

Loaded plugins: rhnplugin, security

This system is not registered with RHN.

RHN support will be disabled.

Setting up Install Process

Parsing package install arguments

Resolving Dependencies

--> Running transaction check

---> Package jenkins.noarch 0:1.599-1.1 set to be updated

--> Finished Dependency Resolution

..........

..........

..........

Total download size: 60 M

Is this ok [y/N]: y

Downloading Packages:

http://pkg.jenkins-ci.org/redhat/jenkins-1.599-1.1.noarch.rpm: [Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>

Trying other mirror.

Error Downloading Packages:

  jenkins-1.599-1.1.noarch: failure: jenkins-1.599-1.1.noarch.rpm from jenkins: [Errno 256] No more mirrors to try.

I am able to ping the server. I am able to access the same link from our Windows environment.

Regards,

Mohamed Sathack

[Mohamed Sathack]

Hi All,

Kindly ignore my earlier response. Since I am a newbie to Linux, I am posting many things as a queries. After posting my earlier response, I tried with "wget" and understand that it is being redirected to some other mirror server(closest to my geography) which is not configured in the hosts file. 

I am not sure about the permanent solution. Because for every new session being created, wget routed via different mirror sites. But tactically resolved the issue by performing "wget" and then adding an entry into hosts file and then tried "yum install jenkins" command in the same session. Now it is installed in my machine.

This is too early to respond since the complete setup is not yet over. But I should not waste your time and effort unnecessarily for the work which is already complete.

Thanks John, Les and Richard for all your valuable inputs

Regards,

Mohamed Sathack

[Richard Bywater]

I'm confused that, given you have Internet access to download things, why you can't connect your machine to a DNS server which would solve a whole bunch of your pain.

Richard.