Application Release Automation (ARA) is terminology that includes several DevOps constructs from a singular, application-centric point of view. In essence, ARA implies the automation of a single app from build through deployment (even if that deployment is to production). Of course, embedded or implied in that automation terminology is build automation or construction; deployment automation, which may include provisioning; and governance automation, which includes testing and approvals.
If your company’s portfolio of applications is small, or if the applications are fully independent from each other, using ARA to describe your DevOps continuum is more or less a complete vernacular. However, if your application portfolio contains interdependencies; you need a coordinated/scheduled release event of multiple applications into production in a particular sequence or timing;or you are required to meet blanket compliance governance requirements that exceed the scope of a single app; you will need to learn how to integrate an ARA-based DevOps strategy with the more traditional discipline of Release Management (RM).
Clarifying ARA
One of the nicer implications of ARA thinking is that it places the value—or, accentuates the value—where it should be; that is, on the application. Automating infrastructure is great, but if no application rides on top of it, the infrastructure is essentially nothing more than unexplored capacity. Most CIOs are not fond of having excess computing capacity sitting idle. So the idea of ARA sets the focus of the automation where it should be: moving an “application” from construction to production release.
ARA is also development methodology-neutral, which means the build, deployment, and releasing automation will look the same regardless of whether the code was prepared using Agile or Waterfall. Mind you, Agile tends to drive the need for speedier delivery systems, but even legacy development teams can find value in consistent delivery system automation once a build is ready to begin. It is, after all, consistency that reduces support costs by reducing errors and creating predictability, thereby improving quality. It also is consistency within the automation that permits scale, whereas variability in the automation deters scale.
ARA also allows for depth within the stack. If code reigns at the top of the stack, then the operating system of the server reigns at the bottom (perhaps networking in the wine cellar and facilities management in the root cellar). ARA incorporates the notion of automating dependent layers of technology under the code such as database services, middleware or messaging services, perhaps the provisioning of a virtual machine, even down as far as configuring the OS, if needed.
The practicality of moving down the stack however, is that the scope of change will continue to have a broader impact than a single app. I usually do not install a single instance of Oracle for each application I create; more often, I have several applications relying upon a single instance of my Oracle setup. So the actual changes I automate as I move down the stack tend to be more of a configuration adjustment. It is more likely my particular app needs a config change to accommodate it rather than a completely new install of a supporting technology component underneath my app. It is also worth noting that the frequency of change as you move down the stack slows down considerably compared with app code riding on it, and the cost or impact of change increases greatly, as you begin to impact a wider number of things riding on it.
Deconstructing ARA
ARA automation, then, includes all the traditional DevOps disciplines, but limiting them to the viewpoint of a single application as follows:
Build Automation: This includes version-controlling each particular build. It also includes packaging all the component technologies to create a deployable package used for deployments throughout the software development life cycle (SDLC). The golden rule here is create a “build once, deploy many” philosophy in your build automation. Changes to code, included configuration files or dependent technology components down the stack must occur in the DEV class environment. Once the deployable package is completed to satisfaction in DEV, it will move unaltered through any other layers of testing environments before it gets to production for ultimate release.
Deployment Automation: Since each deployable package is tightly version-controlled during its construction in build, there is now an ability to roll forward (normal deployment) or roll backward (revert to a prior version) in the event of failed testing in a given SDLC environment. Some of the common environment classes include integration testing, performance testing, user acceptance testing and pre-production quality assurance (QA) testing. Smart DevOps deployment tools utilize the ability to deploy (or overwrite) only the components that are out of sync with the versions listed within the deployable package. This smart deployment capability reduces time and ensures consistency with what “should” be there.
Provisioning Automation: This is an offshoot of deployment automation. For those using virtual machine or cloud technologies, the deployment automation can include the ability to provision or set up an environment of any class on the fly. When testing is completed, the same environment can be decommissioned to not waste capacity or budgets. Provisioning bare-metal servers is precluded by human interactions, although what should go on them also can be fully automated once engineering is done with the physical work.
Governance Automation: Even though substantial testing can and should occur in development, a significant amount of it must occur in other testing-class environments later in the SDLC progression. It is, therefore, a good idea to have the ability to isolate testing automation outside of both build and deployment templates or scripts, still making it callable or executable from an overall workflow manager (often included in the release orchestration or release automation tooling within DevOps). This gives the flexibility to run a series of tests without having to rebuild the application or redeploy the application just to kick it off. In addition to testing evaluation, there may be other process regulations driven by a governance team or compliance entity within the organization. All of these flags must be met and passed before final promotion to production.
Integrating ARA with RM
Dependency is the hobgoblin of simplicity. Applications that are fully independent of each other can utilize an ARA strategy and deploy into production as often as they want. No one else is impacted by this. But if a given application has dependencies upstream—I get my data from, or transact with, someone else—or downstream—my data is provided to someone else—then my path to production must include testing an application different from my own. Determining where the responsibility for failure lies now requires policy instead of just common sense. Synchronizing in-state changes where two dependent applications are now undergoing change at the same time requires policy to govern as well as more sophisticated SDLC testing environments to manage.
When a wider view than just a single application is required, the traditional DevOps discipline of RM or its synonym release orchestration (RO) becomes the solution. RM allows for the sequencing of applications going into production to occur as needed. It allows for testing to occur when a dependency spiderweb is kicked off. RM allows for corporate governance to be applied universally to all applications attempting to enter production, instead of having to build it over and over again in each deployment script or template. RM can produce sophisticated logs designed to satisfy outside regulators for compliance history automation. These kinds of tools become invaluable when there must be a wider view of deployments to production beyond a single app at a time or in a small portfolio.
Given this reality, the key to integrating ARA with RM is to ensure automation is constructed independently by discipline, and can be executed by discipline as needed. ARA encompasses or groups four disciplines together: build, deploy, provision and governance. RM uses the ARA package and extends it with other applications to create a needed sequence, or kicks off selective smaller units such as a testing package when needed to meet certain outside app change conditions based on dependencies. RM can selectively execute the automation ARA creates as it needs to to accommodate larger goals, while ARA continues to focus on keeping its own app as efficient as possible.
Impacts to the Bottom Line
There is no one right answer. There is only the perspective you hold within the DevOps continuum. Knowing that both ARA and RM are ultimately dependent on traditional DevOps disciplines offers flexibility on “how” you think about delivering innovation. In my opinion, ARA is simply the next evolution of automating build and deploy. It is a logical next step.
There are other disciplines within DevOps, however, that might benefit from a wider view of the workflow required to move innovation to production. Take, for example, the integration of monitoring automation in the process, capacity on demand provisioning, security oversight and configuration management database (CMDB) integration—a wider view of how and where these services are integrated with DevOps might reduce the labor required to create them for each app, reinventing the wheel—or worrying the wheel has not been updated properly in a while. At its heart, DevOps attempts to create singular automations to perform tasks, increasing speed, reducing risks and improving quality.
There is no immediate financial impact of this other than to pursue a strategy of single-app focus in an environment where a wider view would have been more ideal. Calculating the cost of that error is akin to picking six lotto numbers from the sky: It is always hard to know what might have been; at that point all one can do is wish.
To continue the conversation, feel free to contact me.
Carmen DeArdo is the director of Build Technologies at Nationwide Insurance. He is responsible for helping drive accelerated delivery utilizing Lean and DevOps techniques across the end-to-end delivery value stream. One current focus area is the creation of an integrated delivery pipeline capability.