The metrics structure passed to volume stat calculator
can contain real stats on subset of metrics fields. For example,
the metrics structure filled by a CSI driver can have
either INODES or BYTES filled, IOW it a valid return.
In such cases the volume stat calculator panic with below
trace:
0516 21:36:19.013143 14452 runtime.go:69] Observed a panic: "invalid memory address or nil pointer dereference" (runtime error: invalid memory address or nil pointer dereference)
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:76
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:65
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:51
/usr/local/go/src/runtime/panic.go:522
/usr/local/go/src/runtime/panic.go:82
/usr/local/go/src/runtime/signal_unix.go:390
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/api/resource/quantity.go:697
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/api/resource/quantity.go:685
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/server/stats/volume_stat_calculator.go:144
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/server/stats/volume_stat_calculator.go:125
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/server/stats/volume_stat_calculator.go:65
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:152
/home/hchiramm/gopath/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/wait/wait.go:153
/usr/local/go/src/runtime/asm_amd64.s:1337
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
This adds a third version v1alpha1 which has the same schema as v1beta1. Moreover, v1beta1 becomes the storage version. Hence, we can do noop webhook conversion from v1alpha1 to v1beta1 and back.
Currently, the credential provider will look in the path set in
the $HOME env variable, but that environment does not exist on
Windows, but $HOMEPATH does. Because of this, if credentials are
set in ~/.docker on Windows, they will not be used by kubelet
when pulling images.
The function os.UserHomeDir can solve this problem [1].
[1] https://golang.org/pkg/os/#UserHomeDir
