Manual Node Upgrade Testing In Harvester A Feature Discussion

Hey guys! We're diving into a cool new feature discussion today: manual upgrades for each node in Harvester. This is super important for maintaining our clusters and ensuring everything runs smoothly. Let's break down what we need to test and how we're going to do it.

What's the Test to Develop?

So, what exactly are we trying to test here? We need to develop a test that verifies the manual upgrade option for individual nodes in a Harvester cluster. This means we should be able to upgrade nodes one by one, instead of having to upgrade the entire cluster at once. This is crucial for minimizing downtime and ensuring that critical services remain available during the upgrade process. Think of it like changing a tire on a car while it's still running – we want to keep the engine going!

This test should cover several scenarios. First, we need to ensure that the manual upgrade option is indeed available for each node. Second, we need to verify that the upgrade process itself works correctly – the node should upgrade to the specified version, and all its services should come back online as expected. Third, we need to test the impact on the rest of the cluster. Upgrading one node shouldn't disrupt the operation of other nodes or the overall cluster health. It's like performing surgery – we want to fix the problem without causing any collateral damage. We also need to consider different upgrade paths. Can we upgrade from one specific version to another? What happens if we try to upgrade to an incompatible version? These are the kinds of questions our test should answer. Finally, we need to make sure that the upgrade process is resilient. What happens if the upgrade fails midway? Can we roll back the node to its previous state? Our test should be robust enough to handle these edge cases. So, in a nutshell, the goal is to create a comprehensive test that validates the manual node upgrade feature in all its aspects.

We'll want to make sure this test is super thorough. We need to cover all the bases, like:

• Verifying the upgrade process: Does the node actually upgrade to the correct version?
• Checking service availability: Do the services on the node come back online after the upgrade?
• Monitoring cluster health: Does the upgrade impact other nodes or the cluster as a whole?
• Testing different upgrade paths: Can we upgrade from various versions?
• Handling failures: What happens if the upgrade fails? Can we roll back?

Basically, we're aiming for a test that gives us complete confidence in the manual node upgrade process.

Prerequisite and Dependency of Test

Okay, before we can even think about running this test, we need to make sure we have the right setup. What prerequisites do we need? What dependencies are there? Let's break it down.

First off, we'll need a Harvester cluster up and running. This is a no-brainer, right? But it's important to specify. The cluster should be in a stable state, with all nodes healthy and services operational. Think of it like a doctor needing a healthy patient to test a new treatment – we need a healthy cluster to test the upgrade process. We also need to have a clear understanding of the current version of Harvester running on the cluster and the target version we want to upgrade to. This will help us define the scope of our test and ensure that we're testing the correct upgrade path. For example, we might want to test upgrading from v1.1.0 to v1.2.0, or from v1.2.0 to the latest version. In addition to the cluster itself, we'll need access to the Harvester management interface (UI or CLI). This is how we'll initiate the manual upgrade process and monitor its progress. We'll also need the necessary credentials to access the cluster and perform administrative tasks. It's like having the keys to the kingdom – we need the right permissions to make changes. From a software perspective, we might need specific tools or libraries installed on our test environment. This could include things like the Harvester CLI, kubectl (for interacting with Kubernetes), or other utilities for monitoring the cluster. It's like having the right tools in our toolbox – we need the necessary software to perform the test. Finally, we need to consider any dependencies between the test case and other tests. Are there any tests that need to be run before this one? Are there any tests that depend on the outcome of this one? Understanding these dependencies will help us ensure that our test suite is well-organized and that we're testing the system in a logical and consistent manner. It's like building a house – we need to lay the foundation before we can build the walls.

So, to sum it up, here's what we need:

• A healthy Harvester cluster
• Clear understanding of current and target Harvester versions
• Access to the Harvester management interface (UI or CLI)
• Necessary credentials for cluster access
• Potentially specific tools or libraries installed
• Understanding of test case dependencies (if any)

Think of these as our pre-flight checklist. We need to make sure we've ticked all the boxes before we can take off and start testing.

We also need to consider if this test depends on any other tests. For example:

• Do we need to run a basic cluster health check first?
• Does this test affect other tests that might run afterwards?

Knowing these dependencies helps us keep our testing process organized and efficient. It's like making sure all the pieces of a puzzle fit together – we need to see the big picture.

Describe the Items of the Test Development (DoD, Definition of Done)

Alright, let's nail down the specifics. What does it mean for this test to be "done"? What are the concrete steps we need to take? This is our Definition of Done (DoD), and it's super important for keeping us on track. Think of it as our roadmap – it tells us exactly where we need to go.

We're going to use a task list to make sure we cover everything. Each item on the list represents a specific task that needs to be completed before the test can be considered finished. And, of course, we'll be using those handy clickable checkboxes to track our progress. It's like a to-do list for our test – we can check things off as we go.

Here’s a breakdown of the tasks, keeping in mind that each one needs to be clearly defined and achievable. First, we need to design the test case. This involves outlining the steps we'll take to test the manual upgrade feature, the scenarios we'll cover, and the expected outcomes. It's like drawing up the blueprints for our test – we need to have a clear plan before we start building. Next, we need to implement the test case. This means writing the code or scripts that will actually perform the test. It's like putting the bricks together – we're turning our design into reality. We'll also need to configure the test environment. This involves setting up the Harvester cluster, installing any necessary tools, and configuring the test parameters. It's like preparing the construction site – we need to make sure everything is ready for the build. Once the test is implemented, we need to execute the test case. This means running the test and observing the results. It's like watching the building go up – we're seeing our plan come to fruition. We'll need to analyze the test results. This involves reviewing the output of the test and determining whether the manual upgrade feature is working as expected. It's like inspecting the finished building – we need to make sure everything is up to code. If we find any issues, we'll need to document any bugs or issues. This involves creating detailed bug reports that describe the problems we've found. It's like writing a punch list – we're identifying the things that need to be fixed. Finally, we need to document the test case and results. This involves creating a comprehensive record of the test case, its execution, and its results. It's like creating an as-built drawing – we're capturing the final state of the project. So, our Definition of Done is a combination of design, implementation, execution, analysis, and documentation. It's a holistic approach to testing that ensures we're delivering a high-quality product.

- [ ] Design the test case
- [ ] Implement the test case
- [ ] Configure the test environment
- [ ] Execute the test case
- [ ] Analyze the test results
- [ ] Document any bugs or issues
- [ ] Document the test case and results

Each of these items needs to be fully completed for the test to be considered "done." This gives us a clear checklist to follow and helps ensure we don't miss any crucial steps.

Additional Context

Alright, let's add some extra context to this whole manual upgrade testing scenario. Sometimes, a little more information can make a big difference in how we approach the problem. Think of it as adding some color to the map – it helps us navigate the territory more effectively.

First off, it's super helpful to know about the related issue on GitHub: harvester/harvester#8764. This link gives us a direct line to the discussion and requirements surrounding this feature. It's like having the architect's notes – we can see the original vision for the project. By checking out the issue, we can understand the specific motivations behind the manual upgrade feature, any potential challenges that have been identified, and the expected behavior of the system. This can help us tailor our test case to address the most critical aspects of the feature. For example, the issue might highlight specific edge cases or scenarios that we need to cover in our test. It might also provide insights into the design decisions that were made, which can help us understand why the feature works the way it does. In addition to the GitHub issue, it's also useful to consider any other relevant documentation or discussions. This could include things like the Harvester user guide, the developer documentation, or community forum posts. These resources can provide valuable context and help us understand the broader ecosystem in which the manual upgrade feature operates. It's like reading the user manual before you try to assemble something – it can save you a lot of time and frustration. For example, the Harvester user guide might provide information about the best practices for upgrading nodes, or the developer documentation might describe the internal workings of the upgrade process. By consulting these resources, we can gain a deeper understanding of the feature and ensure that our test case is comprehensive and accurate. Finally, it's always a good idea to capture any screenshots or diagrams that can help illustrate the test setup or the expected behavior of the system. Visual aids can be incredibly helpful for communicating complex ideas and ensuring that everyone is on the same page. It's like having a picture to go with the story – it makes it much easier to understand. For example, we might want to include screenshots of the Harvester management interface showing the manual upgrade option, or a diagram illustrating the steps involved in the upgrade process. By providing these visual aids, we can help ensure that our test case is clear, concise, and easy to understand.

Adding this extra context can really help us develop a more effective and targeted test. It's like having the full story – we can see the big picture and understand how all the pieces fit together.

So, to summarize, checking out the related issue, looking at documentation, and using screenshots can all add valuable context to our testing efforts. It's like having all the ingredients you need to bake a perfect cake – the more information we have, the better our chances of success!

This additional context helps us understand the bigger picture and develop a more effective test strategy. It's like having a map before you go on a journey – you're much more likely to reach your destination!