chore: Update Go version from 1.21 to 1.25.3

- Update go.mod to Go 1.25.3
- Update Dockerfile to use golang:1.25-alpine
- Update CI workflow to Go 1.25 with test matrix [1.24, 1.25]
- Update release workflow to Go 1.25
- Update Makefile GO_VERSION to 1.25
- Update validate-go-version.sh to handle patch versions

Author: mattmattox

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ on:
       - main
 
 env:
-  GO_VERSION: '1.21'
+  GO_VERSION: '1.25'
   REGISTRY: docker.io/supporttools
 
 jobs:
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: ['1.21', '1.22']
+        go-version: ['1.24', '1.25']
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -74,7 +74,7 @@ jobs:
           fi
 
       - name: Upload coverage to Codecov
-        if: matrix.go-version == '1.22'
+        if: matrix.go-version == '1.25'
         uses: codecov/codecov-action@v4
         with:
           files: ./coverage.out,./coverage-integration.out

.github/workflows/release.yml

@@ -11,7 +11,7 @@ permissions:
   id-token: write
 
 env:
-  GO_VERSION: "1.21"
+  GO_VERSION: "1.25"
   REGISTRY: docker.io
   IMAGE_NAME: supporttools/node-doctor
 

Dockerfile

@@ -2,7 +2,7 @@
 # Optimized multi-stage build for minimal production image (<50MB target)
 
 # Build stage
-FROM golang:1.21-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 # Install build dependencies (git for go mod download)
 RUN apk add --no-cache git

Makefile

@@ -39,7 +39,7 @@ REGISTRY := docker.io/supporttools
 VERSION := $(shell date +%s)
 GIT_COMMIT := $(shell git rev-parse HEAD)
 BUILD_TIME := $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
-GO_VERSION := 1.21
+GO_VERSION := 1.25
 
 # RC Version - for release candidate builds
 RC_VERSION_FILE := .version-rc

go.mod

@@ -1,13 +1,13 @@
 module github.com/supporttools/node-doctor
 
-go 1.21
+go 1.25.3
 
 require (
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/prometheus/client_golang v1.17.0
 	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16
-	github.com/stretchr/testify v1.8.2
 	golang.org/x/net v0.13.0
+	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/api v0.28.0
 	k8s.io/apimachinery v0.28.0
@@ -39,7 +39,6 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/common v0.44.0 // indirect
 	github.com/prometheus/procfs v0.11.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
@@ -51,7 +50,6 @@ require (
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	k8s.io/klog/v2 v2.100.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 // indirect
 	k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 // indirect

scripts/validate-go-version.sh

@@ -5,7 +5,7 @@
 
 set -e
 
-REQUIRED_GO_VERSION="1.21"
+REQUIRED_GO_VERSION="1.25"
 ERRORS=0
 
 echo "Checking Go version in all go.mod files..."
@@ -21,9 +21,12 @@ while IFS= read -r mod_file; do
         continue
     fi
 
-    # Compare versions
-    if [ "$go_version" != "$REQUIRED_GO_VERSION" ] && [ "$go_version" != "${REQUIRED_GO_VERSION}.0" ]; then
-        echo "ERROR: $mod_file has Go version $go_version, expected $REQUIRED_GO_VERSION"
+    # Compare versions - allow patch versions (e.g., 1.25.3 matches 1.25)
+    # Extract major.minor from the go.mod version
+    go_version_minor=$(echo "$go_version" | grep -oE "^[0-9]+\.[0-9]+")
+
+    if [ "$go_version_minor" != "$REQUIRED_GO_VERSION" ]; then
+        echo "ERROR: $mod_file has Go version $go_version, expected $REQUIRED_GO_VERSION or $REQUIRED_GO_VERSION.x"
         ERRORS=$((ERRORS + 1))
     else
         echo "✓ $mod_file: Go $go_version"