Support custom Fedora repos in vagrant provider

cluster/vagrant/provision-utils.sh

@@ -28,7 +28,14 @@ function prepare-package-manager() {
   echo "Prepare package manager"
 
   # Useful if a mirror is broken or slow
-  echo "fastestmirror=True" >> /etc/dnf/dnf.conf
+  if [ -z "$CUSTOM_FEDORA_REPOSITORY_URL" ]; then
+      echo "fastestmirror=True" >> /etc/dnf/dnf.conf
+  else
+      # remove trailing slash from URL if it's present
+      CUSTOM_FEDORA_REPOSITORY_URL="${CUSTOM_FEDORA_REPOSITORY_URL%/}"
+      sed -i -e "/^metalink=/d" /etc/yum.repos.d/*.repo
+      sed -i -e "s@^#baseurl=http://download.fedoraproject.org/pub/fedora@baseurl=$CUSTOM_FEDORA_REPOSITORY_URL@" /etc/yum.repos.d/*.repo
+  fi
 }
 
 

cluster/vagrant/util.sh

@@ -187,6 +187,7 @@ function echo-kube-env() {
   echo "OPENCONTRAIL_KUBERNETES_TAG='${OPENCONTRAIL_KUBERNETES_TAG:-}'"
   echo "OPENCONTRAIL_PUBLIC_SUBNET='${OPENCONTRAIL_PUBLIC_SUBNET:-}'"
   echo "E2E_STORAGE_TEST_ENVIRONMENT='${E2E_STORAGE_TEST_ENVIRONMENT:-}'"
+  echo "CUSTOM_FEDORA_REPOSITORY_URL='${CUSTOM_FEDORA_REPOSITORY_URL:-}'"
 }
 
 function verify-cluster {

docs/devel/developer-guides/vagrant.md

@@ -429,6 +429,20 @@ environment variables. For example, if running `make quick-release`, use:
 sudo -E make quick-release
 ```
 
+#### I have repository access errors during VM provisioning!
+
+Sometimes VM provisioning may fail with errors that look like this:
+
+```
+Timeout was reached for https://mirrors.fedoraproject.org/metalink?repo=fedora-23&arch=x86_64 [Connection timed out after 120002 milliseconds]
+```
+
+You may use a custom Fedora repository URL to fix this:
+
+```shell
+export CUSTOM_FEDORA_REPOSITORY_URL=https://download.fedoraproject.org/pub/fedora/
+```
+
 #### I ran vagrant suspend and nothing works!
 
 `vagrant suspend` seems to mess up the network. It's not supported at this time.