Provide support for air gapped env for rally

Sometimes, tested Kubernetes doesn't have direct access to Internet but
access through repository mirrors.
This patch handles this case for rally test case.

There's two ways for providing the repository mirrors:

- Give an environment variable (`MIRROR_REPO`) which gives a repository
  mirro with all needed images.
- Gives an environment variable per needed repo:
  - `DOCKERHUB_REPO` for DockerHub repository (`docker.io`)
  - `GCR_REPO` for Google Cloud repository (`gcr.io`)
  - `K8S_GCR_REPO` for Kubernetes repository (`k8s.gcr.io`)

Needed images list has also been extracted so Kubernetes administrator can
easily upload these images to the mirror if the mirror also doesn't have
access to Internet.

Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I2ea6622b79f7e3c3c63c1441c4dab48e9bc4fb1a

2 files changed, 55 insertions, 58 deletions

diff --git a/functest_kubernetes/ci/download_images.sh b/functest_kubernetes/ci/download_images.sh
index 1d982ce1..dfadb024 100644
--- a/functest_kubernetes/ci/download_images.sh
+++ b/functest_kubernetes/ci/download_images.sh
@@ -2,66 +2,10 @@
 
 set -e
 
-tmpfile=$(mktemp)
-cat << EOF > $tmpfile
-docker.io/appropriate/curl:edge
-docker.io/aquasec/kube-bench:0.3.1
-docker.io/aquasec/kube-hunter:0.3.1
-docker.io/gluster/glusterdynamic-provisioner:v1.0
-docker.io/library/busybox:1.28
-docker.io/library/busybox:1.29
-docker.io/library/httpd:2.4.38-alpine
-docker.io/library/httpd:2.4.39-alpine
-docker.io/library/nginx:1.14-alpine
-docker.io/library/nginx:1.15-alpine
-docker.io/library/perl:5.26
-docker.io/library/redis:5.0.5-alpine
-docker.io/ollivier/clearwater-astaire:hunter
-docker.io/ollivier/clearwater-bono:hunter
-docker.io/ollivier/clearwater-cassandra:hunter
-docker.io/ollivier/clearwater-chronos:hunter
-docker.io/ollivier/clearwater-ellis:hunter
-docker.io/ollivier/clearwater-homer:hunter
-docker.io/ollivier/clearwater-homestead:hunter
-docker.io/ollivier/clearwater-homestead-prov:hunter
-docker.io/ollivier/clearwater-live-test:hunter
-docker.io/ollivier/clearwater-ralf:hunter
-docker.io/ollivier/clearwater-sprout:hunter
-gcr.io/google-samples/hello-go-gke:1.0
-gcr.io/kubernetes-e2e-test-images/apparmor-loader:1.0
-gcr.io/kubernetes-e2e-test-images/cuda-vector-add:1.0
-gcr.io/kubernetes-e2e-test-images/cuda-vector-add:2.0
-gcr.io/kubernetes-e2e-test-images/echoserver:2.2
-gcr.io/kubernetes-e2e-test-images/ipc-utils:1.0
-gcr.io/kubernetes-e2e-test-images/jessie-dnsutils:1.0
-gcr.io/kubernetes-e2e-test-images/kitten:1.0
-gcr.io/kubernetes-e2e-test-images/metadata-concealment:1.2
-gcr.io/kubernetes-e2e-test-images/nautilus:1.0
-gcr.io/kubernetes-e2e-test-images/nonewprivs:1.0
-gcr.io/kubernetes-e2e-test-images/nonroot:1.0
-gcr.io/kubernetes-e2e-test-images/regression-issue-74839-amd64:1.0
-gcr.io/kubernetes-e2e-test-images/resource-consumer:1.5
-gcr.io/kubernetes-e2e-test-images/sample-apiserver:1.17
-gcr.io/kubernetes-e2e-test-images/volume/gluster:1.0
-gcr.io/kubernetes-e2e-test-images/volume/iscsi:2.0
-gcr.io/kubernetes-e2e-test-images/volume/nfs:1.0
-gcr.io/kubernetes-e2e-test-images/volume/rbd:1.0.1
-k8s.gcr.io/build-image/debian-iptables:v12.1.2
-k8s.gcr.io/conformance:v1.19.0
-k8s.gcr.io/e2e-test-images/agnhost:2.20
-k8s.gcr.io/etcd:3.4.13-0
-k8s.gcr.io/pause:3.2
-k8s.gcr.io/pause:3.3
-k8s.gcr.io/prometheus-dummy-exporter:v0.1.0
-k8s.gcr.io/prometheus-to-sd:v0.5.0
-k8s.gcr.io/sd-dummy-exporter:v0.2.0
-k8s.gcr.io/sig-storage/nfs-provisioner:v2.2.2
-quay.io/coreos/etcd:v2.2.5
-EOF
-for i in $(cat $tmpfile); do
+DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)"
+for i in $(cat $DIR/images.txt); do
     sudo docker pull $i
     # https://kind.sigs.k8s.io/docs/user/quick-start/
     # Be free to use docker save && kind load image-archive
     kind load docker-image $i --name latest
 done
-rm -f $tmpfile
diff --git a/functest_kubernetes/ci/images.txt b/functest_kubernetes/ci/images.txt
new file mode 100644
index 00000000..d6e148b1
--- /dev/null
+++ b/functest_kubernetes/ci/images.txt
@@ -0,0 +1,53 @@
+docker.io/appropriate/curl:edge
+docker.io/aquasec/kube-bench:0.3.1
+docker.io/aquasec/kube-hunter:0.3.1
+docker.io/gluster/glusterdynamic-provisioner:v1.0
+docker.io/library/busybox:1.28
+docker.io/library/busybox:1.29
+docker.io/library/httpd:2.4.38-alpine
+docker.io/library/httpd:2.4.39-alpine
+docker.io/library/nginx:1.14-alpine
+docker.io/library/nginx:1.15-alpine
+docker.io/library/perl:5.26
+docker.io/library/redis:5.0.5-alpine
+docker.io/ollivier/clearwater-astaire:hunter
+docker.io/ollivier/clearwater-bono:hunter
+docker.io/ollivier/clearwater-cassandra:hunter
+docker.io/ollivier/clearwater-chronos:hunter
+docker.io/ollivier/clearwater-ellis:hunter
+docker.io/ollivier/clearwater-homer:hunter
+docker.io/ollivier/clearwater-homestead:hunter
+docker.io/ollivier/clearwater-homestead-prov:hunter
+docker.io/ollivier/clearwater-live-test:hunter
+docker.io/ollivier/clearwater-ralf:hunter
+docker.io/ollivier/clearwater-sprout:hunter
+gcr.io/google-samples/hello-go-gke:1.0
+gcr.io/kubernetes-e2e-test-images/apparmor-loader:1.0
+gcr.io/kubernetes-e2e-test-images/cuda-vector-add:1.0
+gcr.io/kubernetes-e2e-test-images/cuda-vector-add:2.0
+gcr.io/kubernetes-e2e-test-images/echoserver:2.2
+gcr.io/kubernetes-e2e-test-images/ipc-utils:1.0
+gcr.io/kubernetes-e2e-test-images/jessie-dnsutils:1.0
+gcr.io/kubernetes-e2e-test-images/kitten:1.0
+gcr.io/kubernetes-e2e-test-images/metadata-concealment:1.2
+gcr.io/kubernetes-e2e-test-images/nautilus:1.0
+gcr.io/kubernetes-e2e-test-images/nonewprivs:1.0
+gcr.io/kubernetes-e2e-test-images/nonroot:1.0
+gcr.io/kubernetes-e2e-test-images/regression-issue-74839-amd64:1.0
+gcr.io/kubernetes-e2e-test-images/resource-consumer:1.5
+gcr.io/kubernetes-e2e-test-images/sample-apiserver:1.17
+gcr.io/kubernetes-e2e-test-images/volume/gluster:1.0
+gcr.io/kubernetes-e2e-test-images/volume/iscsi:2.0
+gcr.io/kubernetes-e2e-test-images/volume/nfs:1.0
+gcr.io/kubernetes-e2e-test-images/volume/rbd:1.0.1
+k8s.gcr.io/build-image/debian-iptables:v12.1.2
+k8s.gcr.io/conformance:v1.19.0
+k8s.gcr.io/e2e-test-images/agnhost:2.20
+k8s.gcr.io/etcd:3.4.13-0
+k8s.gcr.io/pause:3.2
+k8s.gcr.io/pause:3.3
+k8s.gcr.io/prometheus-dummy-exporter:v0.1.0
+k8s.gcr.io/prometheus-to-sd:v0.5.0
+k8s.gcr.io/sd-dummy-exporter:v0.2.0
+k8s.gcr.io/sig-storage/nfs-provisioner:v2.2.2
+quay.io/coreos/etcd:v2.2.5