Continuous Deployment: Benefits and Best Practices (1)

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Continuous Deployment Benefits and Best Practices
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Table of Contents

• Continuous Deployment
• Continuous Deployments Activities
• Continuous Deployments Tools

• Benefits of Continuous Deployment
• Drawbacks of Continuous Deployment
• Continuous Deployments Best Practices

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Continuous Deployment

• Continuous Deployment (CD) refers to a process
  for software release in which automated testing
  is used to validate the accuracy and the
  stability of the changes to a codebase, for the
  purpose of immediate autonomous deployment for
  production. It does away with the human
  safeguards against unproven code in live
  software.
• In CD, automated deployments are frequently used
  to deliver software functionalities. Continuous
  deployment involves instantiating a
  microservices new version and retiring its old
  version. The process of CD takes a staging
  environments validated features and then deploys
  those into the production environment, where
  these are made ready for release. Continuous
  Deployment is the third part of the Continuous
  Delivery Pipeline. Continuous Delivery Pipeline
  consists of four parts, which are- Continuous
  Exploration (CE), Continuous Integration (CI),
  Continuous Deployment (CD) and Release on Demand.

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Continuous Deployments Activities

• Continuous deployment involves the following four
  activities.
• Deployment of a solution to a production
  environment
• Verifying the solution to ensure that the changes
  function in production as intended, prior to
  being released to customers
• Monitoring and reporting the issues that happen
  during production
• Responding swiftly to address any issue
  encountered during deployment

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Continuous Deployments Tools

• The tools that are required for CD are mentioned
  below, in no particular order.
• Automated testing- It is the most critical tool
  for continuous deployment as it prevents the
  regressions caused by the introduction of new
  code and is capable of replacing new code
  changes manual reviews.
• Rolling deployments- Any continuous deployment
  pipeline should be capable of undoing a
  deployment when breaking changes or bugs are
  deployed. Hence, tools for automated rolling
  deployment become a necessity for ensuring proper
  continuous deployment.
• Monitoring and issuing alerts- An efficient
  continuous deployment pipeline ensures real time
  monitoring as well as issues alerts. Alerts aid
  in triggering a rolling deployment into undoing,
  for reverting a failed deploy.

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Benefits of Continuous Deployment

• The major benefits of continuous deployment are
  the following-
• Enhances software business productivity
• Enables businesses to quickly respond to market
  demands that are continuously changing
• Enables rapid validation and deployment of new
  features as well as ideas
• Facilitates real time reaction to customers
  feedback
• Enables immediate response and deployment with
  regard to customers requests for features and
  their submission of bug reports
• Enables automation of repetitive tasks
• Ensures the integration of teams and processes
  through a unified pipeline
• Delivers a single view across all environments
  and applications
• Renders deployments frictionless

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Drawbacks of Continuous Deployment

• The main drawbacks of continuous deployment are
  that it can be expensive initially and involves
  maintenance for ensuring efficient functioning of
  the continuous deployment pipeline.

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Continuous Deployments Best Practices

• The best practices for ensuring continuous
  deployments success are mentioned below, in no
  particular order.
• Ensuring a test-driven deployment- When
  test-driven deployment is practised, a behaviour
  spec is defined for new software features, prior
  to beginning development. Developers write
  automated tests which match the defined spec. The
  final, deliverable code satisfies the test cases
  and matches the spec. This ensures automated
  testing for all new code.
• Single method of deployment- When a continuous
  deployment pipeline is used, it becomes essential
  that it remains the only method for deployment.
  Performing any manual changes to the continuous
  deployment pipeline will not only break the
  continuous deployment flow but also desync the
  deployment history.
• Containerization- Containerizing any software
  ensures its same behaviour across any system on
  which it is deployed. This aids in eliminating
  various issues that involve a software
  functioning properly on one machine but acting
  differently on some other machine. Integration of
  containers can happen as part of the continuous
  deployment pipeline. This ensures that a code
  behaves similarly during automated testing,
  production and deployment as well as on the
  machine of a developer.

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