Knapsack Pro

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

Rancher Pipelines

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

Semaphore CI

https://semaphoreci.com
Unique feature

DevOps tool for container orchestration

Autoscaling made easy / Great CLI

Type of product

On Premise

SaaS

Offers a free plan

Yes

Free, open source project

Yes

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

Predictable pricing

Yes

It's free!

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.

Support / SLA

Yes

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

N/A

Not clear if they offer any real SLA on support.

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

You can run multiple parallel steps within a build stage

Yes

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

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

Unclear from the documentation (probably not)

N/A

Containers support / Build environment

Yes

Yes

Allows running builds inside docker containers

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

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/

Yes

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

Yes

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

Yes

Self-hosted option

Yes

No

Hosted plans / SaaS

No

Yes

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

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

Yes

Allows defining complex build workflows with ease

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.

Yes

N/A

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.

N/A

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

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.

Specific language support: JavaScript

N/A

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

Yes

Provides rich documentation on integrating Semaphore CI in Javascript projects

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

Yes

Integrations available for GitLab, GitHub and Bitbucket

Yes

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

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

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.

No

Auditing

Yes

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

Yes

Additional notes

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.

List of features is based on Semaphore 2.0

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

Semaphore CI parallelism integration

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