kic test failure: verify_cache_inside_node : different output of crictil and docker images

[medyagh]

thanks to this integration test I found out the cache add command doesnt work as expected on "docker driver" with docker run time.

=== RUN   TestFunctional/serial/CacheCmd/cache/verify_cache_inside_node
--- FAIL: TestFunctional/serial/CacheCmd/cache/verify_cache_inside_node (0.27s)
functional_test.go:365: (dbg) Run:  out/minikube-linux-amd64 -p functional-20200130T194619.520931734-14593 ssh sudo crictl images
functional_test.go:370: expected '1.28.4-glibc' to be in the output: -- stdout --
IMAGE                                TAG                 IMAGE ID            SIZE
k8s.gcr.io/coredns                   1.6.2               bf261d1579144       44.2MB
k8s.gcr.io/etcd                      3.3.15-0            b2756210eeabf       248MB
k8s.gcr.io/kube-apiserver            v1.16.2             9c26fe80bbb38       185MB
k8s.gcr.io/kube-controller-manager   v1.16.2             2f6b22cf92d72       128MB
k8s.gcr.io/kube-proxy                v1.16.2             41d59a0b79325       103MB
k8s.gcr.io/kube-scheduler            v1.16.2             fd6c6fdef2251       105MB
k8s.gcr.io/pause                     3.1                 da86e6ba6ca19       746kB
-- /stdout --

I did manual checking:

./out/minikube cache add busybox

in the integration tests we check the output of crictl images inside minikube and expect busybox to be there.

$ ./out/minikube ssh sudo crictl images
IMAGE                                TAG                 IMAGE ID            SIZE
k8s.gcr.io/coredns                   1.6.2               bf261d1579144       44.2MB
k8s.gcr.io/etcd                      3.3.15-0            b2756210eeabf       248MB
k8s.gcr.io/kube-apiserver            v1.16.2             9c26fe80bbb38       185MB
k8s.gcr.io/kube-controller-manager   v1.16.2             2f6b22cf92d72       128MB
k8s.gcr.io/kube-proxy                v1.16.2             41d59a0b79325       103MB
k8s.gcr.io/kube-scheduler            v1.16.2             fd6c6fdef2251       105MB
k8s.gcr.io/pause                     3.1                 da86e6ba6ca19       746kB

the intertesting is the output of "docker images " has what we need !

$ ./out/minikube ssh sudo docker images
REPOSITORY                                TAG                 IMAGE ID            CREATED             SIZE
k8s.gcr.io/kube-proxy                     v1.17.2             cba2a99699bd        12 days ago         116MB
k8s.gcr.io/kube-controller-manager        v1.17.2             da5fd66c4068        12 days ago         161MB
k8s.gcr.io/kube-apiserver                 v1.17.2             41ef50a5f06a        12 days ago         171MB
k8s.gcr.io/kube-scheduler                 v1.17.2             f52d4c527ef2        12 days ago         94.4MB
busybox                                   latest              6d5fcfe5ff17        5 weeks ago         1.22MB
kubernetesui/dashboard                    v2.0.0-beta8        eb51a3597525        7 weeks ago         90.8MB
k8s.gcr.io/coredns                        1.6.5               70f311871ae1        2 months ago        41.6MB
kindest/kindnetd                          0.5.3               aa67fec7d7ef        3 months ago        78.5MB
k8s.gcr.io/etcd                           3.4.3-0             303ce5db0e90        3 months ago        288MB
kubernetesui/metrics-scraper              v1.0.2              3b08661dc379        3 months ago        40.1MB
alpine                                    3.4                 b7c5ffe56db7        12 months ago       4.82MB
busybox                                   1.28.4-glibc        56cc512116c8        20 months ago       4.4MB
k8s.gcr.io/pause                          3.1                 da86e6ba6ca1        2 years ago         742kB
gcr.io/k8s-minikube/storage-provisioner   v1.8.1              4689081edb10        2 years ago         80.8MB
k8s.gcr.io/pause                          latest              350b164e7ae1        5 years ago         240kB
medya@~/workspace/minikube (kic_engine) $ 

interesting is the same test works fine on VM.