Jenkins pushes app to wrong target - cloud-foundry

we continuously build our apps with Jenkins and deploy them to our different spaces:
...
cf login -a https://api.lyra-836.appcloud.swisscom.com -u ...
cf target -s development
cf push scs-flux-monitoring-development
...
Now we recognized that the push is sometimes taking a wrong space to install the app. We think this is because of another Jenkins Job doing a parallel push. As far we can see the .cf/config.json stores the name of the Space and when another cf target is called all pushes are using that new target.
Anyone who recognized that behaviour also? Any suggestions to solve that?
Kind regards
Josef

There are a couple options you could go with:
Don't use a CI solution that allows shared state between different jobs. Just as Cloud Foundry uses containers to isolate apps, there are CI solutions out there that use containers to isolate builds. One great example is Concourse CI which is actually the main solution used by the core Cloud Foundry development teams.
Have every Jenkins job use a different location for CF_HOME so they don't all share ~jenkins/.cf:
$ cf help | grep CF_HOME
CF_HOME=path/to/dir/ Override path to default config directory

Related

My GKE pods stoped with error "no command specified: CreateContainerError"

Everything was Ok and nodes were fine for months, but suddenly some pods stopped with an error
I tried to delete pods and nodes but same issues.
Try below possible solutions to resolve your issue:
Solution 1 :
Check a malformed character in your Dockerfile and cause it to crash.
When you encounter CreateContainerError is to check that you have a valid ENTRYPOINT in the Dockerfile used to build your container image. However, if you don’t have access to the Dockerfile, you can configure your pod object by using a valid command in the command attribute of the object.
So workaround is to not specify any workerConfig explicitly which makes the workers inherit all configs from the master.
Refer to Troubleshooting the container runtime, similar SO1, SO2 & Also check this similar github link for more information.
Solution 2 :
Kubectl describe pod podname command provides detailed information about each of the pods that provide Kubernetes infrastructure. With the help of this you can check for clues, if Insufficient CPU follows the solution below.
The solution is to either:
1)Upgrade the boot disk: If using a pd-standard disk, it's recommended to upgrade to pd-balanced or pd-ssd.
2)Increase the disk size.
3)Use node pool with machine type with more CPU cores.
See Adjust worker, scheduler, triggerer and web server scale and performance parameters for more information.
If you still have the issue, you can then update the GKE version for your cluster Manually upgrading the control planeto one of the fixed versions.
Also check whether you have updated it in the last year to use the new kubectl authentication coming in the GKE v1.26 plugin?
Solution 3 :
If you're having a pipeline on GitLab that deploys an image to a GKE cluster: Check the version of the Gitlab runner that handles the jobs of your pipeline .
Because it turns out that every image built through a Gitlab runner running on an old version causes this issue at the container start. Simply deactivate them and only let Gitlab runners running last version in the pool, replay all pipelines.
Check the gitlab CI script using an old docker image like docker:19.03.5-dind, update to docker:dind helps the kubernetes to start the pod again.

MQ Custom Docker Image - MQM Group Not Found

Description: Getting the following error when running a docker build. I thought mqm group would be automatically created by default. Doesn't mention otherwise in the site link below. Can someone else try this?
System Notes:(VS Code- Docker build), windows machine.
Error:
useradd: group 'mqm' does not exist
Reference site for instructions:
IBM MQ Customer Docker Image Instructions
Docker File:
FROM ibmcom/mq
USER root
RUN useradd alice -G mqm && \
echo alice:passw0rd | chpasswd
USER mqm
COPY 20-config.mqsc /etc/mqm/
Duplicate of ibmcom/mq docker image backward compatibility issue
From 9.1.5 the container does not use OS based users or groups. This is to conform to cloud best practices. Instead a file based system is being used. This is so that when you roll-out the container in a cloud into production you can switch to an LDAP based system.
The 9.1.5 container uses htpasswd, with the relevant file in /etc/mqm/
For development, if you are not going to create new users, then you can use the 9.1.5 container. If you want to create new users, then you can use 9.1.4 or earlier, or use htpasswd with bcrypt to create the users.
I was using a deprecated site apparently that's in the docker repo link. I guess its a problem with docker and they can`t remove it. Please follow the instructions here. I had no issue.
https://github.com/ibm-messaging/mq-container

Elastic Kubernetes Service AWS Deployment process to avoid down time

Its been a month I have started working on EKS AWS and up till now successfully deployed by code.
The steps which I follow for deployment are given below:
Create image from docker terminal.
Tag and push to ECR AWS.
Create the deployment "project.json" and service file "project-svc.json".
Save the above file in "kubectl/bin" path and deploy it with following commands below.
"kubectl apply -f projectname.json" and "kubectl apply -f projectname-svc.json".
So if I want to deployment the same project again with change, I push the new image on ECR and delete the existing deployment by using "kubectl delete -f projectname.json" without deleting the existing service and deploy it again using command "kubectl apply -f projectname.json" again.
Now, I'm in confusing that after I delete the existing deployment there is a downtime until I apply or create the deployment again. So, how to avoid this ? Because I don't want the downtime actually that is the reason why I started to use the EKS.
And one more thing is the process of deployment is a bit long too. I know I'm missing something can anybody guide me properly please?
The project is on .NET Core and if there is any simplified way to do deployment using Visual Studio please guide me for that also.
Thank You in advance!
There is actually no need to delete your deployment. Just need to update the desired state (the deployment configuration) and let K8s do its magic and apply the needed changes, like deploying a new version of your container.
If you have a single instance of your container, you will experience a short down time while changes are applied. If your application supports multiple replicas (HA), you can enjoy the rolling upgrade feature.
Start by reading the official Kubernetes documentation of a Performing a Rolling Update.
You only need to use the delete/apply if you are changing (And if you have) the ConfigMap attached to the Deployment.
Is the only change you do is the "image" of the deployment - you must use the "set-image" command.
Kubectl let you change the actual deployment image and it does the Rolling Updates all by itself and with 3+ pods you have the minimum chance for downtime.
Even more, if you use the --record flag, you can "rollback" to your previous image with no effort because it keep track of the changes.
You also have the possibility to specify the "Context" too, with no need to jump from contexts.
You can go like this:
kubectl set image deployment DEPLOYMENT_NAME DEPLOYMENT_NAME=IMAGE_NAME --record -n NAMESPACE
OR Specifying the Cluster
kubectl set image deployment DEPLOYEMTN_NAME DEPLOYEMTN_NAME=IMAGE_NAME_ECR -n NAMESPACE --cluster EKS_CLUSTER_NPROD --user EKS_CLUSTER --record
As an Eg:
kubectl set image deployment nginx-dep nginx-dep=ecr12345/nginx:latest -n nginx --cluster eu-central-123-prod --user eu-central-123-prod --record
The --record is what let you track all the changes, if you want to rollback just do:
kubectl rollout undo deployment.v1.apps/nginx-dep
More documentations about it here:
Updating a deployment
https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#updating-a-deployment
Roll Back Deployment
https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#rolling-back-a-deployment

Deploy app from CircleCI with

I'm looking to automatically deploy my app once we release a new version. We use CircleCI, so firing these commands shouldn't be a big deal.
cf login -a https://api.lyra-836.appcloud.swisscom.com -u myuser -p seret
cf push myapp
However I don't want to expose my personal credentials (Passeport acount) into our git repository. Is it possible to generate an API key for that purpose?
How do you handle that? I might also need to ssh into the instance to fire some migrations scripts after the deployment, same goes there.
Currently Swisscoms Application cloud does not offer technical accounts but you can create an additional account easily. Then add it to your org/space as developer and it should be able to fulfill your needs.
CircleCI documentation has a section about handling secrets: Using CircleCI Environment Variables
Setting environment variables for all commands without adding them to
git
Occasionally, you’ll need to add an API key or some other secret
as an environment variable. You might not want to add the value to
your git history. Instead, you can add environment variables using the
Project settings > Environment Variables page of your project.
This documentation describes how to store encrypted stuff within your VCS.
If you prefer to keep your sensitive environment variables checked
into git, but encrypted, you can follow the process outlined at
circleci/encrypted-files.

AWS Elastic Beanstalk - Starting SWF Background Workers

I have been trying to find out the best way to run background jobs using PHP on AWS Elastic beanstalk, and after many hours searching on Google and SO, I believe that one good solution is using SWF and activity workers.
I found this example buried in the aws-sdk-for-php: https://github.com/amazonwebservices/aws-sdk-for-php/tree/master/_samples/AmazonSimpleWorkflow/cron
The read-me file says:
To run this sample, you need to execute three scripts from the command line in separate terminal/console windows
and
Note that the start_cron_example_workflow.php script will exit quickly
while the decider and activity worker scripts keep running until you
manually terminate them.
the decider and activity worker will loop "forever", and trying to run these in EB is what I'm having trouble doing.
In my .ebextensions directory I have a file that executes these files:
container_commands:
01background_task:
command: "php -f start_cron_example_activity_workers.php"
02background_task:
command: "php -f start_cron_example_workflow_workers.php"
But I get the following error messages:
ERROR
Failed to deploy application version.
ERROR
Some instances have not responded to commands. Responses were not received from [i-a5417ed4].
Any way I can do this using config files? How can I make this work in AWS EB without introducing a single point of failure?
Thank you.
You might consider using a service like IronWorker — this is specifically designed for what you are trying to do and will probably work better than putting together your own solution on a micro instance.
I have not used Iron.io yet, but was evaluating it as I am looking to move my stuff over to AWS so I need to have cron jobs handled as well.
Have you taken a look at the Fat Controller ? It can daemonise anything. There's documentation and examples on the website: http://fat-controller.sourceforge.net