Software Development: Difference between revisions
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A collaborative process enabled by automation where ''application development'', ''QA'' and ''Operations teams'' jointly accelerate delivery of new business application and services. DevOps emphasizes ''collaboration'' and ''cooperation''. | A collaborative process enabled by automation where ''application development'', ''QA'' and ''Operations teams'' jointly accelerate delivery of new business application and services. DevOps emphasizes ''collaboration'' and ''cooperation''. | ||
=Blue/Green Deployment= | =Blue/Green Deployment= | ||
Revision as of 02:15, 8 December 2021
Internal
Cloud Service Delivery Models
Overview
With any of the delivery modes below, the provider controls and manages some portion of the technology stack. The customer manages the portion of the technology stack that is not managed by the provider. The benefit is that the customer controls the design of its portion of the stack.
External
- NIST definition of Cloud Computing http://csrc.nist.gov/publications/nistpubs/800-145/SP800-145.pdf
Infrastructure-as-a-Service (IaaS)
The IaaS delivery model lets the user of the service to provision processing, storage, networking and other computing resources on which they can run O/S and applications. This includes the hardware and the virtualization layers. The service users do not control the underlying computing infrastructure except select networking configuration or perhaps the physical location of the resources at gross geographical level. On the other hand, they control - but they must install and manage - the operating system, the middleware and the application code. Infrastructure as a service is targeted at teams that are building out infrastructure.
Example: Amazon Web Service, IBM Cloud.
Platform-as-a-Service (PaaS)
"Platform as a Service" describes an additional level of services layered on top of an infrastructure as a service foundation. These services include operating systems, database, middleware, etc. "Platform as a Service" are platforms for building and running custom applications, and are targeted at application development teams. The customer controls the design of the application, but the management of the platform stack is abstracted away. The customer can focus on functionality design and coding.
PaaS is also named "cloud application platform".
Example: OpenShift, Google app engine.
External:
- http://en.wikipedia.org/wiki/Platform_as_a_service
- Salesforce - What is PaaS? http://www.salesforce.com/paas/
- http://www.infoq.com/presentations/Java-in-the-Cloud-PaaS-Platform-in-Comparison
- Netflix Adrian Cockcroft on Architecture for the Cloud http://www.infoq.com/interviews/Adrian-Cockcroft-Netflix
Software-as-a-Service (SaaS)
In this model, the software is the actual service offered on the web (salesforce.com, Intuit Quickbooks). The customer does not need to manage anything, but they also do not control anything, including the design of the application. This works well, unless the customer needs functionality that is not available in the application.
DevOps
A collaborative process enabled by automation where application development, QA and Operations teams jointly accelerate delivery of new business application and services. DevOps emphasizes collaboration and cooperation.
Blue/Green Deployment
A/B Deployments
Twelve-Factor Application
Semantic Versioning
Good Reads
Developing Applications for the Cloud
Microservices
Infrastructure as Code (IaC)
Infrastructure as Code is an approach to IT systems infrastructure management, where various elements of the underlying hardware infrastructure are represented as programming constructs rather than physical hardware. This approach can be used in combination with automation tools to provide the ability to provision infrastructure in a repeatable and reliable manner.
Code Review
Techical Debt
Simplicity
- https://thinkingsideways.net/code/2019/03/24/simplicity-over-flexibility.html
- https://www.infoq.com/articles/simplicity-manifesto-development
Scrum
Domain-Driven Design
Software Security
Consistency
To Process
- Grady Booch - Building the Enchanted Land https://www.infoq.com/presentations/ai-best-practices. Health of the system: "do you have a regular process of release?" "do you have a sense of architecture?"