enabled a few more linter rules

.golangci.yml

@@ -6,11 +6,114 @@ run:
 linters:
   default: none
   enable:
-    - ineffassign
-    - unused
-    - govet
+    - arangolint
+    - asasalint
+    - asciicheck
+    - bidichk
+    - bodyclose
+    - canonicalheader
+    - containedctx
+    - contextcheck
+    # - copyloopvar                 1
+    # - cyclop                      15
+    - decorder
+    # - depguard                    265
+    - dogsled
+    # - dupl                        2
+    - dupword
+    - durationcheck
+    # - embeddedstructfieldcheck    5
+    # - err113                      64
     - errcheck
+    - errchkjson
+    - errname
+    # - errorlint                   4
+    # - exhaustive                  2
+    # - exhaustruct                 260
+    - exptostd
+    - fatcontext
+    # - forbidigo                   6
+    # - forcetypeassert:            5
+    # - funcorder:                  5
+    # - funlen:                     24
+    - ginkgolinter
+    - gocheckcompilerdirectives
+    # - gochecknoglobals            31
+    # - gochecknoinits              14
+    - gochecksumtype
+    # - gocognit                    5
+    - goconst
+    # - gocritic                    3
+    # - gocyclo                     1
+    # - godot                       24
+    # - godox                       8
+    - goheader
+    - gomoddirectives
+    - gomodguard
+    - goprintffuncname
+    # - gosec                       55
+    # - gosmopolitan                5
+    - govet
+    - grouper
+    - iface
+    - importas
+    # - inamedparam                 6
+    - ineffassign
+    - interfacebloat
+    # - intrange                    1
+    # - ireturn                     15
+    # - lll                         59
+    - loggercheck
+    - maintidx
+    - makezero
+    - mirror
+    - misspell
+    # - mnd 29
+    - musttag
+    - nakedret
+    # - nestif                      7
+    # - nilerr                      2
+    # - nilnesserr                  2
+    # - nilnil                      3
+    # - nlreturn                    149
+    - noctx
+    # - noinlineerr                 81
+    - nolintlint
+    # - nonamedreturns              2
+    - nosprintfhostport
+    # - paralleltest                54
+    # - perfsprint                  14
+    # - prealloc                    5
+    # - predeclared                 1
+    - promlinter
+    # - protogetter                 7
+    - reassign
+    # - recvcheck                   3
+    # - revive                      133
+    - rowserrcheck
+    - sloglint
+    - spancheck
+    - sqlclosecheck
     - staticcheck
+    - tagalign
+    # - tagliatelle                6
+    - testableexamples
+    # - testifylint                10
+    # - testpackage                34
+    # - thelper                     4
+    - tparallel
+    - unconvert
+    # - unparam                   1
+    - unused
+    - usestdlibvars
+    # - usetesting                3
+    # - varnamelen                33
+    - wastedassign
+    - whitespace
+    # - wrapcheck                 26
+    # - wsl                       403
+    # - wsl_v5                    58
+    - zerologlint
   exclusions:
     generated: lax
     paths:

pkg/healthchecker/health_checker.go

@@ -126,9 +126,22 @@ func logPatternHealthCheck(service string, loopBackTime time.Duration, logPatter
 // healthCheckEndpointOKFunc returns a function to check the status of an http endpoint
 func healthCheckEndpointOKFunc(endpoint string, timeout time.Duration) func() (bool, error) {
 	return func() (bool, error) {
+		req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, endpoint, nil)
+		if err != nil {
+			return false, err
+		}
 		httpClient := http.Client{Timeout: timeout}
-		response, err := httpClient.Get(endpoint)
-		if err != nil || response.StatusCode != http.StatusOK {
+		response, err := httpClient.Do(req)
+		if err != nil {
+			return false, nil
+		}
+		defer func() {
+			err := response.Body.Close()
+			if err != nil {
+				klog.Warningf("failed to close http client: %v", err)
+			}
+		}()
+		if response.StatusCode != http.StatusOK {
 			return false, nil
 		}
 		return true, nil

pkg/systemlogmonitor/logwatchers/filelog/log_watcher_test.go

@@ -148,7 +148,7 @@ Jan  2 03:04:05 kernel: [2.000000] 3
 				t.Logf("failed to remove temporary file %s: %v", f.Name(), err)
 			}
 		}()
-		_, err = f.Write([]byte(test.log))
+		_, err = f.WriteString(test.log)
 		assert.NoError(t, err)
 
 		w := NewSyslogWatcherOrDie(types.WatcherConfig{

pkg/systemstatsmonitor/net_collector_test.go

@@ -85,6 +85,7 @@ func testCollectAux(t *testing.T, name string, excludeInterfaceRegexp ssmtypes.N
 }
 
 func TestCollect(t *testing.T) {
+	t.Parallel()
 	tcs := []struct {
 		Name                   string
 		ExcludeInterfaceRegexp ssmtypes.NetStatsInterfaceRegexp

pkg/util/helpers_linux_test.go

@@ -21,6 +21,7 @@ import (
 )
 
 func TestGetOSVersionLinux(t *testing.T) {
+	t.Parallel()
 	testCases := []struct {
 		name              string
 		fakeOSReleasePath string

pkg/util/metrics/helpers_test.go

@@ -56,7 +56,7 @@ func TestPrometheusMetricsParsingAndMatching(t *testing.T) {
 				// Metric with non-existent label.
 				{
 					Name:   "host_uptime",
-					Labels: map[string]string{"non-existant-version": "0.0.1"},
+					Labels: map[string]string{"non-existent-version": "0.0.1"},
 				},
 				// Metric with incorrect label.
 				{

pkg/util/metrics/system/cmdline_args.go

@@ -17,6 +17,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
+
+	"k8s.io/klog/v2"
 )
 
 type CmdlineArg struct {
@@ -25,7 +27,11 @@ type CmdlineArg struct {
 }
 
 func (d CmdlineArg) String() string {
-	s, _ := json.Marshal(d)
+	s, err := json.Marshal(d)
+	if err != nil {
+		klog.Errorf("failed to marshal cmdline arg: %v", err)
+		return ""
+	}
 	return string(s)
 }
 

pkg/util/metrics/system/module_stats.go

@@ -18,6 +18,8 @@ import (
 	"fmt"
 	"strconv"
 	"strings"
+
+	"k8s.io/klog/v2"
 )
 
 type Module struct {
@@ -29,7 +31,11 @@ type Module struct {
 }
 
 func (d Module) String() string {
-	s, _ := json.Marshal(d)
+	s, err := json.Marshal(d)
+	if err != nil {
+		klog.Errorf("failed to marshal module stat: %v", err)
+		return ""
+	}
 	return string(s)
 }