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kubeadm: add final fallback to constants.CurrentKubernetesVersion

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It may happen that both the git version and the remote version
are broken/inaccessible. In this case the broken remote version
would be used.

To overcome this situation fall back to the constant CurrentKubernetesVersion.

The alternative could be os.Exit(1).

Also this change fixes Bazel-based unit tests in air-gapped environment.
This commit is contained in:
Dmitry Rozhkov 2018-12-27 12:21:47 +02:00
parent af31a202ea
commit 9e25a00ec0
1 changed files with 12 additions and 4 deletions
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16
cmd/kubeadm/app/util/version.go
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@ -29,6 +29,7 @@ import (
netutil "k8s.io/apimachinery/pkg/util/net"
versionutil "k8s.io/apimachinery/pkg/util/version"
"k8s.io/klog"
"k8s.io/kubernetes/cmd/kubeadm/app/constants"
pkgversion "k8s.io/kubernetes/pkg/version"
)
@ -92,13 +93,20 @@ func KubernetesReleaseVersion(version string) (string, error) {
if body != "" {
return "", err
}
// Handle air-gapped environments by falling back to the client version.
klog.Infof("could not fetch a Kubernetes version from the internet: %v", err)
klog.Infof("falling back to the local client version: %s", clientVersion)
return KubernetesReleaseVersion(clientVersion)
if clientVersionErr == nil {
// Handle air-gapped environments by falling back to the client version.
klog.Warningf("could not fetch a Kubernetes version from the internet: %v", err)
klog.Warningf("falling back to the local client version: %s", clientVersion)
return KubernetesReleaseVersion(clientVersion)
}
}
if clientVersionErr != nil {
if err != nil {
klog.Warningf("could not obtain neither client nor remote version; fall back to: %s", constants.CurrentKubernetesVersion)
return KubernetesReleaseVersion(constants.CurrentKubernetesVersion.String())
}
klog.Warningf("could not obtain client version; using remote version: %s", body)
return KubernetesReleaseVersion(body)
}