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What is the difference between imperative and declarative automation?
In a software engineering context, declarative programming means writing code to describe what the program should do as opposed to how it should do it. In contrast, imperative programming involves writing code that follows explicit steps to solving a problem, completing a task, or achieving a desired result.
What is declarative automation?
Declarative/Model-Based Automation. The principle is that we declare, using a model, what a system should look like. The model is “data driven,” which allows data, in the form of attributes or variables, to be injected into the model at runtime to bring it to a desired state.
What is declarative deployment?
Declarative deployments allow us to describe how an application should be updated, leveraging different strategies while allowing for fine-tuning of the various aspects of the deployment process. The core of the deployment is centered around its ability to start and stop pods in a predictable manner.
Is Ansible imperative or declarative?
Both Ansible and Puppet are declarative systems. Chef, however, is imperative which has always ruled it out for us.
What is a declarative model?
In declarative modelling, we represent a model not as a series of assignment and control statements, but as a set of facts that are true about the model. The order in which we present the facts is (unlike a procedural program) irrelevant.
What is declarative model?
Is Kubernetes declarative?
Kubernetes is a declarative system. Instead of a single controller, however, it has several controllers that are each responsible for a different Kubernetes object type, such as ReplicaSet or Deployment, for example.
Is Chef declarative or procedural?
Chef and Ansible use a procedural style language where you write code that specifies, step-by-step, how to achieve the desired end state. The onus is on the user to determine the optimal deployment process.