refresh

Refresh

A Go-based CLI tool to manage and monitor AWS EKS node groups using your local kubeconfig and AWS credentials.

Features

• List all managed node groups in your EKS cluster
• See AMI status for each nodegroup (✅ Latest, ❌ Outdated, ⚠️ Updating)
• Detect and show nodegroups that are currently being updated
• Update the AMI for all or specific nodegroups (rolling by default, with optional force)
• Color-coded, readable CLI output

Requirements

• Go 1.23+
• AWS credentials (~/.aws/credentials or environment variables)
• kubeconfig (~/.kube/config)

Usage

List Nodegroups

List all managed nodegroups in a cluster, showing their status and AMI state:

go run main.go list --cluster <cluster-name>

# Filter nodegroups using partial name matching
go run main.go list --cluster <cluster-name> --nodegroup <partial-name>

Example output:

development-blue
├── dev-blue-groupD-20230814214633237700000007
│   ├── Status: ACTIVE
│   ├── Instance Type: t3a.large
│   ├── Desired: 15
│   ├── Current AMI: ami-0ce9a7e5952499323
│   └── AMI Status: ❌ Outdated

├── dev-blue-groupE-20230815204000720600000007
│   ├── Status: ACTIVE
│   ├── Instance Type: t3a.large
│   ├── Desired: 16
│   ├── Current AMI: ami-0ce9a7e5952499323
│   └── AMI Status: ❌ Outdated

└── dev-blue-groupF-20230815230923929900000007
    ├── Status: ACTIVE
    ├── Instance Type: t3a.large
    ├── Desired: 14
    ├── Current AMI: ami-0ce9a7e5952499323
    └── AMI Status: ❌ Outdated

• ✅ Latest: Nodegroup is using the latest recommended AMI for the cluster
• ❌ Outdated: Nodegroup AMI is not the latest
• ⚠️ Updating: Nodegroup is currently being updated (status and AMI status both show this)

Update AMI for Nodegroups

Trigger a rolling update to the latest AMI for all or a specific nodegroup:

# Update all nodegroups
go run main.go update-ami --cluster <cluster-name>

# Update a specific nodegroup
go run main.go update-ami --cluster <cluster-name> --nodegroup <nodegroup-name>

# Update nodegroups using partial name matching
go run main.go update-ami --cluster <cluster-name> --nodegroup <partial-name>

# Force update (replace all nodes, even if already latest)
go run main.go update-ami --cluster <cluster-name> --force

Example output:

# Single nodegroup update
$ go run main.go update-ami --cluster development-blue --nodegroup groupF
Updating nodegroup dev-blue-groupF-20230815230923929900000007...
Update started for nodegroup dev-blue-groupF-20230815230923929900000007

# Multiple matches with confirmation
$ go run main.go update-ami --cluster development-blue --nodegroup group
Multiple nodegroups match pattern 'group':
  1) dev-blue-groupD-20230814214633237700000007
  2) dev-blue-groupE-20230815204000720600000007
  3) dev-blue-groupF-20230815230923929900000007
Update all 3 matching nodegroups? (y/N): y
Updating nodegroup dev-blue-groupD-20230814214633237700000007...
Update started for nodegroup dev-blue-groupD-20230814214633237700000007
Updating nodegroup dev-blue-groupE-20230815204000720600000007...
Update started for nodegroup dev-blue-groupE-20230815204000720600000007
Updating nodegroup dev-blue-groupF-20230815230923929900000007...
Update started for nodegroup dev-blue-groupF-20230815230923929900000007

Partial Name Matching:

Both --cluster and --nodegroup flags support partial name matching to make it easier to work with long names:

Cluster Matching:

• --cluster development matches development-blue, development-prod, etc.
• --cluster blue matches development-blue, staging-blue, etc.

Nodegroup Matching:

• --nodegroup groupF matches dev-blue-groupF-20230815230923929900000007
• --nodegroup monolith matches all nodegroups containing "monolith"
• --nodegroup 20230815 matches all nodegroups created on that date

When multiple items match, the tool will show all matches and ask for confirmation before proceeding.

List Command Filtering:

You can also filter the list output using the same partial matching:

# Show only nodegroups containing "group"
$ go run main.go list --cluster development-blue --nodegroup group
development-blue
├── dev-blue-groupD-20230814214633237700000007
│   ├── Status: ACTIVE
│   └── AMI Status: ❌ Outdated

├── dev-blue-groupE-20230815204000720600000007
│   ├── Status: ACTIVE
│   └── AMI Status: ❌ Outdated

└── dev-blue-groupF-20230815230923929900000007
    ├── Status: ACTIVE
    └── AMI Status: ❌ Outdated

# Show only monolith nodegroups
$ go run main.go list --cluster development-blue --nodegroup monolith
development-blue
├── dev-blue-monolithD-20230816000007673100000007
└── dev-blue-monolithE-20230816002441701900000007

When multiple nodegroups match in update commands, the tool will show all matches and ask for confirmation before proceeding.

Release Process

Prerequisites

• Ensure you have push access to both repositories:
  • dantech2000/refresh (main repository)
  • dantech2000/homebrew-tap (Homebrew tap)
• GitHub Personal Access Token (GH_PAT) is configured in repository secrets
• GoReleaser is installed locally for testing

Release Steps

1. Update Version Number

   Update the version in main.go:

   var versionInfo = VersionInfo{
       Version:   "v0.1.3",  // <- Update this version
       Commit:    "",
       BuildDate: "",
   }
   

2. Run Pre-Release Checks

   # Full development check (format, lint, test, build)
   task dev:full-check
   
   # Test GoReleaser configuration
   task release:test
   
   # Optional: Dry run of release process (local only)
   task release:dry-run
   

3. Validate Setup

   # Check if ready for release
   task release:check
   
   # Validate Homebrew formula syntax
   task tap:validate
   

4. Create and Push Release Tag

   # Create tag and push (triggers GitHub Actions)
   task release:tag VERSION=v0.1.3
   
   # Or manually:
   git tag -a v0.1.3 -m "Release v0.1.3"
   git push origin v0.1.3
   

5. Monitor Release Process

   After pushing the tag:

   • GitHub Actions will automatically trigger
   • GoReleaser will build binaries for all platforms
   • GitHub release will be created with artifacts
   • Homebrew formula will be updated in homebrew-tap repository
   • Users can install with: brew install dantech2000/tap/refresh

Useful Task Commands

# Development workflow
task dev:quick-test          # Format, vet, build, test version
task dev:full-check          # Full check including lint and tests

# Release workflow  
task release:check           # Verify ready for release
task release:test            # Test GoReleaser config (no release)
task release:dry-run         # Full dry run (local only)
task release:tag VERSION=v0.1.x  # Create and push release tag

# Testing
task run:version             # Test version command
task run:list                # Test list command
task run:help                # Show help

# Homebrew tap
task tap:validate            # Validate formula syntax
task tap:test-local          # Instructions for local testing

# Utilities
task clean                   # Clean build artifacts
task deps                    # Download and tidy dependencies

Post-Release Verification

After a successful release:

1. Check GitHub Release: Verify release appears with all artifacts
2. Test Homebrew Installation:

   brew tap dantech2000/tap
   brew install refresh
   refresh version
   

3. Update Documentation: If needed, update examples in README

Troubleshooting

• Build Failures: Run task release:test to check GoReleaser config
• Permission Issues: Verify GH_PAT token has correct permissions
• Homebrew Formula Issues: Run task tap:validate to check syntax
• Version Conflicts: Ensure version in main.go matches git tag

Security

• Does not log or store credentials
• Sanitizes input parameters

This is a work in progress...