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Bazel vs Jenkins: What are the differences?
Developers describe Bazel as "Correct, reproducible, fast builds for everyone". Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google's software, and thus it has been designed to handle build problems present in Google's development environment. On the other hand, Jenkins is detailed as "An extendable open source continuous integration server". In a nutshell Jenkins CI is the leading open-source continuous integration server. Built with Java, it provides over 300 plugins to support building and testing virtually any project.
Bazel can be classified as a tool in the "Java Build Tools" category, while Jenkins is grouped under "Continuous Integration".
Some of the features offered by Bazel are:
- Multi-language support: Bazel supports Java, Objective-C and C++ out of the box, and can be extended to support arbitrary programming languages.
- High-level build language: Projects are described in the BUILD language, a concise text format that describes a project as sets of small interconnected libraries, binaries and tests. By contrast, with tools like Make you have to describe individual files and compiler invocations.
- Multi-platform support: The same tool and the same BUILD files can be used to build software for different architectures, and even different platforms. At Google, we use Bazel to build both server applications running on systems in our data centers and client apps running on mobile phones.
On the other hand, Jenkins provides the following key features:
- Easy installation
- Easy configuration
- Change set support
"Fast" is the top reason why over 18 developers like Bazel, while over 497 developers mention "Hosted internally" as the leading cause for choosing Jenkins.
Bazel and Jenkins are both open source tools. It seems that Jenkins with 13.2K GitHub stars and 5.43K forks on GitHub has more adoption than Bazel with 12.2K GitHub stars and 2K GitHub forks.
According to the StackShare community, Jenkins has a broader approval, being mentioned in 1753 company stacks & 1479 developers stacks; compared to Bazel, which is listed in 11 company stacks and 7 developer stacks.
We are currently using Azure Pipelines for continous integration. Our applications are developed witn .NET framework. But when we look at the online Jenkins is the most widely used tool for continous integration. Can you please give me the advice which one is best to use for my case Azure pipeline or jenkins.

If your source code is on GitHub, also take a look at Github actions. https://github.com/features/actions
I'm open to anything. just want something that break less and doesn't need me to pay for it, and can be hosted on Docker. our scripting language is powershell core. so it's better to support it. also we are building dotnet core in our pipeline, so if they have anything related that helps with the CI would be nice.

Google cloud build can help you. It is hosted on cloud and also provide reasonable free quota.
I'm planning to setup complete CD-CD setup for spark and python application which we are going to deploy in aws lambda and EMR Cluster. Which tool would be best one to choose. Since my company is trying to adopt to concourse i would like to understand what are the lack of capabilities concourse have . Thanks in advance !

I would definetly recommend Concourse to you, as it is one of the most advanced modern methods of making CI/CD while Jenkins is an old monolithic dinosaur. Concourse itself is cloudnative and containerbased which helps you to build simple, high-performance and scalable CI/CD pipelines. In my opinion, the only lack of skills you have with Concourse is your own knowledge of how to build pipelines and automate things. Technincally there is no lack, i would even say you can extend it way more easily. But as a Con it is more easy to interact with Jenkins if you are only used to UIs. Concourse needs someone which is capable of using CLIs.
From a StackShare Community member: "Currently we use Travis CI and have optimized it as much as we can so our builds are fairly quick. Our boss is all about redundancy so we are looking for another solution to fall back on in case Travis goes down and/or jacks prices way up (they were recently acquired). Could someone recommend which CI we should go with and if they have time, an explanation of how they're different?"
We use CircleCI because of the better value it provides in its plans. I'm sure we could have used Travis just as easily but we found CircleCI's pricing to be more reasonable. In the two years since we signed up, the service has improved. CircleCI is always innovating and iterating on their platform. We have been very satisfied.
As the maintainer of the Karate DSL open-source project - I found Travis CI very easy to integrate into the GitHub workflow and it has been steady sailing for more than 2 years now ! It works well for Java / Apache Maven projects and we were able to configure it to use the latest Oracle JDK as per our needs. Thanks to the Travis CI team for this service to the open-source community !

I use Google Cloud Build because it's my first foray into the CICD world(loving it so far), and I wanted to work with something GCP native to avoid giving permissions to other SaaS tools like CircleCI and Travis CI.
I really like it because it's free for the first 120 minutes, and it's one of the few CICD tools that enterprises are open to using since it's contained within GCP.
One of the unique things is that it has the Kaniko cache, which speeds up builds by creating intermediate layers within the docker image vs. pushing the full thing from the start. Helpful when you're installing just a few additional dependencies.
Feel free to checkout an example: Cloudbuild Example

I use Travis CI because of various reasons - 1. Cloud based system so no dedicated server required, and you do not need to administrate it. 2. Easy YAML configuration. 3. Supports Major Programming Languages. 4. Support of build matrix 6. Supports AWS, Azure, Docker, Heroku, Google Cloud, Github Pages, PyPi and lot more. 7. Slack Notifications.

You are probably looking at another hosted solution: Jenkins is a good tool but it way too work intensive to be used as just a backup solution.
I have good experience with Circle-CI, Codeship, Drone.io and Travis (as well as problematic experiences with all of them), but my go-to tool is Gitlab CI: simple, powerful and if you have problems with their limitations or pricing, you can always install runners somewhere and use Gitlab just for scheduling and management. Even if you don't host your git repository at Gitlab, you can have Gitlab pull changes automatically from wherever you repo lives.

If you are considering Jenkins I would recommend at least checking out Buildkite. The agents are self-hosted (like Jenkins) but the interface is hosted for you. It meshes up some of the things I like about hosted services (pipeline definitions in YAML, managed interface and authentication) with things I like about Jenkins (local customizable agent images, secrets only on own instances, custom agent level scripts, sizing instances to your needs).
Jenkins is a pretty flexible, complete tool. Especially I love the possibility to configure jobs as a code with Jenkins pipelines.
CircleCI is well suited for small projects where the main task is to run continuous integration as quickly as possible. Travis CI is recommended primarily for open-source projects that need to be tested in different environments.
And for something a bit larger I prefer to use Jenkins because it is possible to make serious system configuration thereby different plugins. In Jenkins, I can change almost anything. But if you want to start the CI chain as soon as possible, Jenkins may not be the right choice.
Pros of Bazel
- Fast28
- Deterministic incremental builds20
- Correct17
- Multi-language16
- Enforces declared inputs/outputs14
- High-level build language10
- Scalable9
- Multi-platform support5
- Sandboxing5
- Dependency management4
- Windows Support2
- Flexible2
- Android Studio integration1
Pros of Jenkins
- Hosted internally522
- Free open source466
- Great to build, deploy or launch anything async316
- Tons of integrations242
- Rich set of plugins with good documentation211
- Has support for build pipelines111
- Open source and tons of integrations75
- Easy setup67
- It is open-source63
- Workflow plugin54
- Configuration as code11
- Very powerful tool10
- Continuous Integration9
- Many Plugins9
- Git and Maven integration is better8
- Great flexibility8
- 100% free and open source7
- Github integration6
- Slack Integration (plugin)6
- Easy customisation5
- Self-hosted GitLab Integration (plugin)5
- Docker support4
- Pipeline API4
- Platform idnependency3
- Excellent docker integration3
- Fast builds3
- Hosted Externally3
- Customizable2
- AWS Integration2
- It's Everywhere2
- JOBDSL2
- Can be run as a Docker container2
- It`w worked2
- Easily extendable with seamless integration1
- Build PR Branch Only1
- NodeJS Support1
- PHP Support1
- Ruby/Rails Support1
- Universal controller1
- Loose Coupling1
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Cons of Bazel
- No Windows Support3
- Bad IntelliJ support2
- Poor windows support for some languages1
- Constant breaking changes1
- Learning Curve1
- Lack of Documentation1
Cons of Jenkins
- Workarounds needed for basic requirements12
- Groovy with cumbersome syntax9
- Plugins compatibility issues7
- Lack of support6
- Limited abilities with declarative pipelines6
- No YAML syntax4
- Too tied to plugins versions3