I have a few build scripts which can be run from the command line. I'd like to have a web UI to run them and I thought about using Jenkins. I see that the Jenkins job supports parameters and then defined parameters are set as environment variables in the build environment. However, I would not like to have to alter my scripts to accept input from environment variables, it would be easier to continue to accept input from command line. I thought about adding the following shell command to the Jenkins job:
eg <build_script> --option1 $JENKINS_PARAM1 --option2 $JENKINS_PARAM2
Then, I would not need to alter my existing build scripts. Is that a common/recommended usage of Jenkins?
Yes, This seems to be perfectly fine for me.
Related
I set up a Jenkins to integrate the JMeter script. Using the Freestyle project in Jenkins, I enabled "This project is parameterized" to set a String parameters for the Threads, Loop_Count and Think Time.
In .jmx file, I used the Function Parameters function to define those
variables, as shown below image:
User Defined Variable
In Jenkins, I configured the parameterization as shown below:
Set Parameterization
Command Line
However, when running the test for 40 users using the Build parameter in Jenkins, it looks like the # of threads/users are not correct that is being executed, the Samples that are being generated only 3 for most of the pages. Only the Homepage (which is the first page on the test) is only getting the correct # of Samples, but the rest of the URLS/pages are not correct. Below the actual output.
Output
Can you please help what might the causing this issue, I already checked the Jmeter script and jenkins config and appears to be correct but still I'm getting the issue. Thanks for the help.
Setting parameters in Jenkins itself is not sufficient to pass them to JMeter, you need to pass this parameterized value to JMeter startup script via -J command-line argument
-Jusers=%users%
End-to-end demo:
More information: Apache JMeter Properties Customization Guide
I am trying to read the environment variables in Groovy Postbuild step. I am able to read the values of parameters passed to builds but unable to read the values of parameters which are set in one of my Execute Windows batch command.
In one example of my Execute Windows batch command I do this:
SET custom_param=myValue
if I use ${custom_param} in other jenkins steps/jobs, it gets my value. So I am sure it has the value. I just can't get it in groovy script
I have tried followings to do so, none of them have worked:
manager.envVars['custom_param']
build.buildVariableResolver.resolve('custom_param')
build.getEnvironment(listener).get('custom_param')
Any help here would be great
(Assuming you're not running your script in groovy sandbox)
Try the bellow:
build = Thread.currentThread().executable
String jobName = build.project.getName()
job = Hudson.instance.getJob(jobName)
my_env_var = job.getLastBuild().getEnvironment()["YOUR_ENV_VAR"]
Groovy Post build step run as separate process. It has access to environment as normal JVM process.
You could use EnvInject plugin as a a build step. Subsequent steps in build will able to read this via normal environment access (System.env in your groovy script)
When you set some custom variables in your "Windows command batch" step, these variables are available only during this Jenkins step.
Once Jenkins move on the next step, your variables are lost...
If you want to set some variables permanently, you can try to use the SETX command:
What is the difference between setx and set in environment variables in Windows?
Say I've got dev, qa, and stable server environments for some web app, with corresponding git branches. Each environment should be continuously integrated. Each of these environments has a separate username/password pair used to publish the app. I would like to make a Jenkins multiconfiguration (matrix) job to publish to all of these environments. The publishing almost certainly must be done with a shell script.
My failed attempt consisted of using the Jenkins Credentials and Credentials Binding plugins. Credentials Binding provides a way to inject credentials as environment variables using a parameter. However, setting this parameter dynamically (i.e., something like if ENV == dev: CREDS = CREDS_dev) doesn't appear to be possible. Build scripts happen afterwards, and even using the Environment Script plugin doesn't work.
Is there any way for this to happen?
Had similar situation and used groovy script with parameterized build (https://wiki.jenkins-ci.org/display/JENKINS/EnvInject+Plugin). In my case I had a choice parameter defined as "DEPLOY" and had different values, like "Test", "Release", then in the following groovy script (Evaluated Groovy script):
if ("Test".equals(DEPLOY)) {def map = [DEPLOY_URL: "http://someurl", DEPLOY_STORAGE: "testaccount"]; return map }
You should be able to specify your credentials in here or copy env variables. After that you can access these variables in windows batch command using:
echo %DEPLOY_URL%
echo %DEPLOY_STORAGE%
I also had another choice parameter defined "Deploy.Branch", with values of "dev" and "master". And used it as a parameter to Branches to Build, the value was set to (if you want to dynamically specify branch based on parameters):
*/${Deploy.Branch}
Hope this helps.
Here's what I ended up doing. It's kind of a workaround for what I would argue is a flawed design or missing use case in Jenkins.
Redid my creds so they have standard IDs (this is in the Advanced part and you can't set it after creation)
Matrix job runs a trivial script to figure out what env maps to what creds ID, then triggers...
The main job that does the deployment
I want to know how can we parameterize build in jenkins. I need to create a jenkins job which will contain 5 sub jobs in it. i need to create a drop down , selelct any of the module and build it. But the script used is different for every sub build? can any1 guide on the same is it possible.
string parameters in Jenkins result in environment variables of the same name.
So, you could write a wrapper script in bash which would look for the environment variables that could be set as a result of the parameterized build (i.e. your 5 sub-jobs) in a series of if-elif statements, and within each one, you would invoke the necessary build script from there.
The build script that you would have Jenkins run would be the wrapper script.
I am trying to set up Jenkins to continually check out and build code and verify that the code is compilable.
Our build system works like this: we have several different .bat files that set up environment variables for different build configurations, and then we execute gmake to actually build the code.
When I created Jenkins job, in Build part of the job I set up two "Execute windows batch command" commands: one that calls the script to set up env. variables, and gmake to build it.
Problem is, when gmake step runs, all environment variables are forgotten. How can I prevent env. variables from being cleared?
Tx
What if you set it up to call only one bat file instead? That one file can then call the two you're currently calling with Jenkins.