Knapsack Pro

Semaphore CI vs Rancher Pipelines comparison of Continuous Integration servers
What are the differences between Semaphore CI and Rancher Pipelines?

Semaphore CI

https://semaphoreci.com

Rancher Pipelines

https://rancher.com/docs/rancher/v2.x/en/project-admin/tools/pipelines/
Unique feature

Autoscaling made easy / Great CLI

DevOps tool for container orchestration

Type of product

SaaS

On Premise

Offers a free plan

Yes

1,300 service minutes every month. Plans to release a free tier for open source projects.

Yes

Free, open source project

Predictable pricing

Yes

Semaphore doesn't have traditional pricing tiers, instead it lists the types of machines you can use and their pricing per second of service. They plan to release an annual plan at some point.

Yes

It's free!

Support / SLA

N/A

Not clear if they offer any real SLA on support.

Yes

Paid support available: https://rancher.com/pricing/

Paralellism
Every CI servers tends to address this differently (parallel, distributed, build matrix). Some of it is just marketing, and some is just nuance. For this table, parallel means that tasks can be run concurrently on the same machine, distributed means that tasks can be scaled horizontally, on multiple machines
How to split tests in parallel in the optimal way with Knapsack Pro

Yes

Allows defining a custom build matrix such that your build can be parallelized accross several different environments.

Yes

You can run multiple parallel steps within a build stage

Distributed builds
distributed means that tasks can be scaled horizontally, on multiple machines
How to split tests in parallel in the optimal way with Knapsack Pro

N/A

N/A

Unclear from the documentation (probably not)

Containers support / Build environment

Yes

Allows running builds inside docker containers

Yes

Analytics / Status overview
Analytics and overview referrs to the ability to, at a glance, see what's breaking (be it a certain task, or the build for a specific project)

Yes

Yes

Not particularly clear, but it appears you can monitor stats in a Grafana dashboard: https://rancher.com/docs/rancher/v2.x/en/project-admin/tools/monitoring/

Management support
How easy is it to manage users / projects / assign roles and permissions and so on

Yes

Yes

User management is available, with specific roles assigned, or permissions to certain resources and projects

Self-hosted option

No

Yes

Hosted plans / SaaS

Yes

No

Build pipelines
A continuous delivery pipeline is a description of the process that the software goes through from a new code commit, through testing and other statical analysis steps all the way to the end-users of the product.

Yes

Allows defining complex build workflows with ease

Yes

Pipelines as code (YML files), but also manageable via the UI

Reports
Reports are about the abilty to see specific reports (like code coverage or custom ones), but not necesarily tied in into a larger dashboard.

N/A

Yes

Ecosystem
Besides the official documentation and software, is there a large community using this product? Are there any community-driven tools / plugins that you can use?

N/A

N/A

Specific language support: Ruby
Some CI servers have built-in support for parsing RSpec or Istanbul output for example and we mention those. Some others make it even easier by detecting Gemfiles or package.json and automate parts of the process for the developer.

Yes

Provides rich documentation on integrating Semaphore CI in Ruby projects. Also provides sudo access if you need to install system dependencies or C extensions.

N/A

Pipelines / CI is just a small part of Rancher. No specific support mentioned.

Specific language support: JavaScript

Yes

Provides rich documentation on integrating Semaphore CI in Javascript projects

N/A

Pipelines / CI is just a small part of Rancher. No specific support mentioned.

Integrations
1st party support for common tools (like Slack notifications, various VCS platforms, etc)

Yes

Integration with GitHub and Slack. They allow building iOS projects via their macOS Mojave VM image.

Yes

Integrations available for GitLab, GitHub and Bitbucket

API
Custom integreation is available, via an API or otherwise, it's mentioned separately as it allows further customization than any of the Ecosystem/Integration options

No

Yes

REST API available. It provides introspection and documentation: https://github.com/rancher/api-spec/blob/master/specification.md#filtering. It should offer enough access to allow building whatever customizations or integrations with 3rd party tools deemed necessary.

Auditing

Yes

Yes

Allows logging to various systems (Kafka, Elastic, etc) which should make audit possible

Additional notes

List of features is based on Semaphore 2.0

Rancher is a full software stack for container orchestration, going as far as building their own Linux distribution (RancherOS). Using Rancher seems more like a decision to be made considering all other features Rancher offers, not just the CI server. Also worth noting that Rancher uses Jenkins under the hood, but the engine is locked so projects can't just be migrated between the two.

Running Rails tests in parallel on Semaphore CI 2.0 with dynamic test files split

Semaphore CI parallelism integration

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