Swap cgroupsv1 testing from GitHub Actions runner to Vagrant VM

[austinvazquez]

This pull request includes CI updates for cgroup v1 testing by swapping from Ubuntu 20 GitHub Actions runners to AlmaLinux/8 Vagrant VMs. This is needed because the cgroup v1 GitHub Actions runners went end-of-life in April 2025.

This pull request also includes several minor CI updates:

1. Update GitHub Actions runners from Ubuntu 22.04 to Ubuntu 24.04
2. Add Go 1.24 to CI matrix
3. Update golangci-lint to v2 (and addressed findings) Closes build(deps): bump golangci/golangci-lint-action from 6 to 8 #366

[Copilot]

Pull Request Overview

This PR updates the testing environment for cgroups by swapping out cgroupsv1 tests from the GitHub Actions runner to a Vagrant VM setup while also updating related tooling and CI configurations.

• Adds a new Vagrant-based provisioning script (resize-vagrant-root.sh) for adjusting the VM filesystem.
• Refactors key parsing in rdma utils for both cgroup1 and cgroup2 using switch-case.
• Updates CI workflows, Go versions, and associated configurations to support Ubuntu 24.04 and the new testing infrastructure.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
script/resize-vagrant-root.sh	New script for resizing VM root partition with updated filesystem logic.
cgroup2/utils.go	Refactored rdma key parsing with a switch-case statement.
cgroup1/rdma.go	Similar refactoring to use switch-case in parsing rdma kv.
cgroup1/memory_test.go	Minor formatting adjustments in test variable declarations and conditions.
Vagrantfile	New Vagrant configuration for provisioning and testing within a VM.
.golangci.yml	Minimal update to disable errcheck in linting configuration.
.github/workflows/ci.yml	Updated CI workflow with new OS version, Go version updates and Vagrant-based test jobs.

[Copilot]

Pull Request Overview

This PR updates the CI setup to swap cgroup v1 testing from GitHub Actions runners to AlmaLinux/8 Vagrant VMs and makes several ancillary CI improvements. Key changes include:

• Adding a new Vagrant provisioning script (resize-vagrant-root.sh) for VM disk resizing.
• Converting conditional logic in RDMA parsing from if/else to switch-case in both cgroup1 and cgroup2.
• Updating GitHub Actions workflows to run on Ubuntu 24.04, adding Go 1.24 to the CI matrix, and upgrading golangci-lint.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
script/resize-vagrant-root.sh	New script for resizing the Vagrant VM root partition during provisioning.
cgroup2/utils.go	Switch-case refactor for parsing RDMA key-value pairs.
cgroup1/rdma.go	Same refactor as cgroup2 to improve clarity in RDMA key handling.
cgroup1/memory_test.go	Minor code style updates in boolean declarations and test conditions.
Vagrantfile	New Vagrant configuration for AlmaLinux/8, including multiple provisioning steps.
.golangci.yml	New configuration file for golangci-lint with enabled linter settings.
.github/workflows/ci.yml	CI workflow updates including OS version upgrade, Go version matrix changes, and vagrant-based test jobs.

[Copilot]

The regex used to parse the device name may not match commonly used device names like /dev/nvme0n1p1 that include numbers in the device portion. Consider updating the regex to something like ^/dev/([a-z0-9]+)([0-9]+)$ to better support a broader range of device names.

Suggested change

	if [[ "$df_line" =~ ^/dev/([a-z]+)([0-9]+) ]]; then
	if [[ "$df_line" =~ ^/dev/([a-z0-9]+)([0-9]+) ]]; then