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In this video, we'll talk about CICD, a common DevOps technology.

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CICD is Continuous Integration and Continuous Delivery, sometimes also referred to as Continuous

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Deployment.

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It's a core DevOps element that enforces automation in building, testing and deployment

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of applications.

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And the CICD pipeline is the backbone of modern DevOps operations.

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In CI, all developers merge code changes in a central repository multiple times a day

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to ensure consistency.

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And Git is a common repository technology used for that.

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CD automates the software release process based on these frequent changes.

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And to do so, the CD includes automated infrastructure provisioning and deployment.

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Now CD can stand for Continuous Delivery.

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That is where the configuration or the code is made available and the final step of implementation

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needs to be done by a person.

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And Continuous Deployment is where it happens all automatically, including the deployment

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where no longer the work of a person is involved.

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Let's talk about CI and its tools.

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First, a version control system, such as Git, allows developers to work with branches, which

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are later merged into the main code.

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You learned about it in lesson 19 of this course.

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CI automation is used to watch the repository for changes.

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And there are different options to do so.

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Webhooks on Docker image repositories, for instance, detect changes automatically and

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can update an application.

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Jenkins is a very common CICD solution.

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And others, such as Tectal, which integrates very well in Kubernetes, or GitLab Actions

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can be used for CI.

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When CI is automated, changes must be verified.

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And that is what happens in a pipeline that goes through different phases.

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Now let's talk about CD and its tools.

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At the end of the continuous integration pipeline, there is continuous delivery, which ensures

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that software is published once it is ready.

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A deployable version is created every time the pipeline runs successfully.

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And that can happen multiple times a day.

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Continuous delivery can be enhanced to continuous deployment, where the release is not only

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published but also deployed without further human intervention.