[chore] Upgrade Go version to v1.19

Makefile

@@ -32,7 +32,7 @@ fmt:
 
 lint:
 ifndef HAS_LINT
-	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.48.0
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50.1
 	@echo "golangci-lint has been installed"
 endif
 	hack/verify-golangci-lint.sh

cmd/katib-controller/v1beta1/main.go

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 /*
- Katib-controller is a controller (operator) for Experiments and Trials
+Katib-controller is a controller (operator) for Experiments and Trials
 */
 package main
 

cmd/metricscollector/v1beta1/file-metricscollector/main.go

@@ -42,7 +42,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -268,7 +267,7 @@ func watchMetricsFile(mFile string, stopRules stopRulesFlag, filters []string, f
 				klog.Fatalf("Create mark file %v error: %v", markFile, err)
 			}
 
-			err = ioutil.WriteFile(markFile, []byte(common.TrainingEarlyStopped), 0)
+			err = os.WriteFile(markFile, []byte(common.TrainingEarlyStopped), 0)
 			if err != nil {
 				klog.Fatalf("Write to file %v error: %v", markFile, err)
 			}

docs/developer-guide.md

@@ -12,7 +12,7 @@ see the following user guides:
 
 ## Requirements
 
-- [Go](https://golang.org/) (1.18 or later)
+- [Go](https://golang.org/) (1.19 or later)
 - [Docker](https://docs.docker.com/) (20.10 or later)
 - [Docker Buildx](https://docs.docker.com/build/buildx/) (0.8.0 or later)
 - [Java](https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html) (8 or later)

examples/v1beta1/trial-images/simple-pbt/README.md

@@ -19,7 +19,7 @@ In this problem, using PBT with a population of 2-4 is sufficient to
 roughly approximate this lr schedule. Higher population sizes will yield
 faster convergence. Training will not converge without PBT.
 
-If you want read more about this example, vist the 
+If you want to read more about this example, vist the 
 [ray](https://github.com/ray-project/ray/blob/7f1bacc7dc9caf6d0ec042e39499bbf1d9a7d065/python/ray/tune/examples/README.rst) 
 documentation.
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/kubeflow/katib
 
-go 1.18
+go 1.19
 
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.0

hack/verify-golangci-lint.sh

@@ -25,4 +25,4 @@ if [ -z "$(command -v golangci-lint)" ]; then
 fi
 
 echo 'Running golangci-lint'
-golangci-lint run --timeout 5m --go 1.18
+golangci-lint run --timeout 5m --go 1.19

pkg/metricscollector/v1beta1/common/pns.go

@@ -18,7 +18,6 @@ package common
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -139,7 +138,7 @@ func WaitPIDs(pids map[int]bool, mainPid int, opts WaitPidsOpts) error {
 						if opts.CompletedMarkedDirPath != "" {
 							markFile := filepath.Join(opts.CompletedMarkedDirPath, fmt.Sprintf("%d.pid", pid))
 							// Read file with "completed" marker
-							contents, err := ioutil.ReadFile(markFile)
+							contents, err := os.ReadFile(markFile)
 							if err != nil {
 								return fmt.Errorf("training container is failed. Unable to read file %v for pid %v, error: %v", markFile, pid, err)
 							}

pkg/metricscollector/v1beta1/file-metricscollector/file-metricscollector.go

@@ -19,7 +19,7 @@ package sidecarmetricscollector
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"regexp"
 	"strconv"
@@ -40,7 +40,7 @@ func CollectObservationLog(fileName string, metrics []string, filters []string,
 		return nil, err
 	}
 	defer file.Close()
-	content, err := ioutil.ReadAll(file)
+	content, err := io.ReadAll(file)
 	if err != nil {
 		return nil, err
 	}

pkg/new-ui/v1beta1/backend.go

@@ -211,7 +211,7 @@ func (k *KatibUIHandler) FetchTrialTemplates(w http.ResponseWriter, r *http.Requ
 	}
 }
 
-//AddTemplate adds template to ConfigMap
+// AddTemplate adds template to ConfigMap
 func (k *KatibUIHandler) AddTemplate(w http.ResponseWriter, r *http.Request) {
 	var data map[string]interface{}
 	if err := json.NewDecoder(r.Body).Decode(&data); err != nil {

pkg/ui/v1beta1/backend.go

@@ -226,7 +226,7 @@ func (k *KatibUIHandler) FetchTrialTemplates(w http.ResponseWriter, r *http.Requ
 	}
 }
 
-//AddTemplate adds template to ConfigMap
+// AddTemplate adds template to ConfigMap
 func (k *KatibUIHandler) AddTemplate(w http.ResponseWriter, r *http.Request) {
 	var data map[string]interface{}
 	if err := json.NewDecoder(r.Body).Decode(&data); err != nil {

test/e2e/v1beta1/hack/aws/run-e2e-experiment.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -55,7 +54,7 @@ func main() {
 		log.Fatal("Path to Experiment yaml is missing")
 	}
 	expPath := os.Args[1]
-	byteExp, err := ioutil.ReadFile(expPath)
+	byteExp, err := os.ReadFile(expPath)
 	if err != nil {
 		log.Fatalf("Error in reading file: %v", err)
 	}

test/e2e/v1beta1/hack/gh-actions/run-e2e-experiment.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -47,7 +46,7 @@ func main() {
 		log.Fatal("Path to Experiment yaml is missing")
 	}
 	expPath := os.Args[1]
-	byteExp, err := ioutil.ReadFile(expPath)
+	byteExp, err := os.ReadFile(expPath)
 	if err != nil {
 		log.Fatalf("Error in reading file: %v", err)
 	}