Thanks, Jeff. Very insightful.

On Friday, August 21, 2015 at 1:45:30 AM UTC-4, Jeff Vincent wrote:
>
> You can do a lot with Jenkins so you dont need GoCD.  We are using GoCD 
> because I think it does  better job at visualizing and managing deployment 
> pipelines (post-build) and provides idempotent revisions which we use as a 
> rollback solution.  In other words, pipelines are versioned and if done 
> right you can go back in time and rerun any step with the exact settings 
> used previously.
>
> if you don't need or care about that and the complexity is not too crazy, 
> stick with Jenkins.  What Jenkins does very well is the implicit Maven 
> build dependences and all the other tool and  plug in integrations to get 
> your initial build artifacts, source/coverage analysis such as SonarQube 
> etc. and unit test reporting.
>
> Good luck!
> On Aug 20, 2015 8:40 PM, "Martin" <[email protected] <javascript:>> wrote:
>
>> Hi, Jeff:
>>
>> Very helpful! So it looks like between my Jenkins and Nexus, I also need 
>> a GoCD? Have never used it, but good to learn about it.
>>
>> Thanks,
>>
>> On Thursday, August 20, 2015 at 6:59:59 PM UTC-7, Jeff Vincent wrote:
>>>
>>> If (as an example) you are running Ubuntu 12.04 or 14.04, you would 
>>> install 'tomcat7-admin'  (`sudo apt-get install tomcat7-admin).  Then there 
>>> is a file /var/lib/tomcat7/conf/tomcat-users.xml that configures the users 
>>> allowed to authenticate to the admin (via UI or API endpoint) to manage the 
>>> applications deployed to Tomcat.  The url for the manager application would 
>>> be something like:
>>>
>>> http://<yourserver>:8080/manager/html
>>>
>>> See https://tomcat.apache.org/tomcat-7.0-doc/manager-howto.html for 
>>> details on using/configuring it.
>>>
>>> WIthout a manager API or interface, you somehow need to get the WAR file 
>>> to the server.  If using tomcat (as an example) on Ubuntu the typical path 
>>> (if installed via the apt package system) would be 
>>> /var/lib/tomcat7/webapps.  Dropping the WAR file in there would cause it to 
>>> automatically deploy/redeploy.  Again, I'm not familiar with JBoss but I 
>>> imagine it is similar.
>>>
>>> At my previous company, Jenkins published the WAR file version to our 
>>> GoCD pipeline.  It would then go to Nexus and pull that version of the WAR, 
>>> create and RPM (CentOS based distro), push the RPM to a central repository, 
>>> update Chef Data Bags and then initiate the Chef update which would pull 
>>> the new RPM onto the server and push the WAR to the right folder.
>>>
>>> At my current company we are using GoCD with SaltStack to update the 
>>> Salt pillar files for the application.  WHen we run the salt 
>>> state.highstate command, the system detects a change to the WAR file, pulls 
>>> it directly from Nexus and drops it into the tomcat webapps folder (after 
>>> it does a stop tomcat, clean old war folder/file, restart tomcat).  It also 
>>> provisions tomcat if needed and updates any application specific properties 
>>> files or settings.
>>>
>>> Hope that was clear. 
>>>
>>> On Thu, Aug 20, 2015 at 6:17 PM, Brent Atkinson <[email protected]> 
>>> wrote:
>>>
>>>> He means the Apache Tomcat manager app. It provides the means to 
>>>> programmatically deploy to Tomcat. JBoss has similar  functionality 
>>>> exposed 
>>>> through its management services, though you may have to enable/secure it. 
>>>> This assumes your server lives longer than a deployment, which is not how 
>>>> everyone does it.
>>>> On Aug 20, 2015 8:05 PM, "Martin" <[email protected]> wrote:
>>>>
>>>>> Hi, Jeff:
>>>>>
>>>>> What do you mean by the "manager application" in the description of 
>>>>> "manager application to be installed and configured"? Is it Nexus? Thanks.
>>>>>
>>>>> On Thursday, August 20, 2015 at 7:43:34 PM UTC-4, Jeff Vincent wrote:
>>>>>>
>>>>>> I don't know anything about JBoss, but Apache (Tomcat) doesn't 'grab' 
>>>>>> anything.  You have to push the build to the server either using the 
>>>>>> tomcat 
>>>>>> manager API or use some other mechanism (SCP, wget, etc.) to otherwise 
>>>>>> grab 
>>>>>> the WAR file and get it onto the server.
>>>>>>
>>>>>> Jenkins has the 'deploy war/ear to a container' plugin to facilitate 
>>>>>> this, but it requires (in the case of tomcat) the manager application to 
>>>>>> be 
>>>>>> installed and configured.  If your production environment is like ours, 
>>>>>> they will not install the manager application so it is either 
>>>>>> copied/configured manually or you can script it via a provisioning tool 
>>>>>> (SaltStack, Chef, Ansible, Puppet, etc.) and there are numerous ways to 
>>>>>> do 
>>>>>> it through any of those tools.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Thu, Aug 20, 2015 at 5:12 PM, Martin <[email protected]> wrote:
>>>>>>
>>>>>>> If I use Nexus OSS as a repository manager, the normal for code goes 
>>>>>>> to production system is something like below:
>>>>>>>
>>>>>>> 1) Jenkins grabs code from Perforce or GIT server
>>>>>>> 2) Jenkins retrieves dependencies from Nexus
>>>>>>> 3) Jenkins test and build the project
>>>>>>> 4) The build is deployed to Nexus from Jenkins
>>>>>>> 5) Web application server, i.e. JBoss Application Server or Apache 
>>>>>>> Server grabs code from Nexus, for production service.
>>>>>>>
>>>>>>> In this flow, the build in Jenkins doesn't directly go or deploy to 
>>>>>>> Web server, but first parked at Nexus, and goes to Web server.
>>>>>>>
>>>>>>> Is this understanding right? I would appreciation an explanation for 
>>>>>>> this cycle. 
>>>>>>>
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>>>>>>> .
>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> -- 
>>>>>> Jeff Vincent
>>>>>> See my LinkedIn profile at:
>>>>>> http://www.linkedin.com/in/rjeffreyvincent
>>>>>>
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>>>>>
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>>>>
>>>
>>>
>>>
>>> -- 
>>> Jeff Vincent
>>> See my LinkedIn profile at:
>>> http://www.linkedin.com/in/rjeffreyvincent
>>>
>> -- 
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>

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