b3d0eff376
* switched to client-go approach to doing preflight-checks, dns check, k8s-version check added, updated readme
59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
package preflight
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import (
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"fmt"
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"github.com/Masterminds/semver/v3"
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"k8s.io/apimachinery/pkg/version"
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)
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const minK8sVersion = "1.11.0"
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func (qp *QliksensePreflight) CheckK8sVersion(namespace string, kubeConfigContents []byte) error {
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var currentVersion *semver.Version
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clientset, _, err := getK8SClientSet(kubeConfigContents, "")
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if err != nil {
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err = fmt.Errorf("Unable to create clientset: %v\n", err)
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return err
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}
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var serverVersion *version.Info
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if err := retryOnError(func() (err error) {
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serverVersion, err = clientset.ServerVersion()
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return err
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}); err != nil {
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err = fmt.Errorf("Unable to get server version: %v\n", err)
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//fmt.Println(err)
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return err
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}
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fmt.Printf("Kubernetes API Server version: %s\n", serverVersion.String())
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// Compare K8s version on the cluster with minimum supported k8s version
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currentVersion, err = semver.NewVersion(serverVersion.String())
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if err != nil {
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err = fmt.Errorf("Unable to convert server version into semver version: %v\n", err)
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//fmt.Println(err)
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return err
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}
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fmt.Printf("Current K8s Version: %v\n", currentVersion)
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minK8sVersionSemver, err := semver.NewVersion(minK8sVersion)
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if err != nil {
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err = fmt.Errorf("Unable to convert minimum Kubernetes version into semver version:%v\n", err)
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fmt.Println(err)
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return err
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}
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if currentVersion.GreaterThan(minK8sVersionSemver) {
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//fmt.Printf("\n\nCurrent %s Component version: %s is less than minimum required version:%s\n", component, currentComponentVersion, componentVersionFromDependenciesYaml)
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fmt.Printf("Current %s is greater than minimum required version:%s, hence good to go\n", currentVersion, minK8sVersionSemver)
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fmt.Println("Preflight minimum kubernetes version check: PASSED")
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} else {
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fmt.Printf("Current %s is less than minimum required version:%s\n", currentVersion, minK8sVersionSemver)
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fmt.Println("Preflight minimum kubernetes version check: FAILED")
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}
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fmt.Printf("Completed Preflight kubernetes minimum version check\n\n")
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return nil
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}
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