feat: Support for kubelogin on Azure

closes #32

README.md

@@ -396,6 +396,9 @@ Prefix a cluster name with an ! to load the admin-credentials for that cluster i
 * (azure flavour) Environment AZ_K8S_INSTALL_OPTIONS: Additional options for the az aks install-cli programm.
 (Defaults to empty)
 
+* (azure flavour) Environment AZ_KUBELOGIN_VERSION: Version of kubelogin to install (e.g. v0.0.13). Kubelogin 
+won't be installed, if not set (which is the default)
+
 * (aws flavour) Environment AWS_K8S_CLUSTERS: A comma separated list of EKS clusters to manage
 inside *CloudControl* (only for aws flavour).
 For each cluster give the cluster name. If you need to assume an ARN role, add that to the clustername

feature/kubernetes/feature.yaml

@@ -13,6 +13,9 @@ configuration:
     - |
         (azure flavour) Environment AZ_K8S_INSTALL_OPTIONS: Additional options for the az aks install-cli programm.
         (Defaults to empty)
+    - |
+        (azure flavour) Environment AZ_KUBELOGIN_VERSION: Version of kubelogin to install (e.g. v0.0.13). Kubelogin 
+        won't be installed, if not set (which is the default)
     - |
         (aws flavour) Environment AWS_K8S_CLUSTERS: A comma separated list of EKS clusters to manage
         inside *CloudControl* (only for aws flavour).

feature/kubernetes/install.sh

@@ -29,6 +29,18 @@ if [ "X$(cat /home/cloudcontrol/flavour)X" == "XazureX" ]; then
   IFS=' ' read -r -a install_options <<< "${AZ_K8S_INSTALL_OPTIONS:=""}"
 
   execHandle "Installing kubectl" sudo az aks install-cli "${install_options[@]}"
+
+  if [ "X${AZ_KUBELOGIN_VERSION:=""}X" != "XX" ]; then
+      TEMPDIR=$(mktemp -d)
+      cd "${TEMPDIR}" || exit
+      execHandle "Downloading kubelogin" curl -LO "https://github.com/Azure/kubelogin/releases/download/${AZ_KUBELOGIN_VERSION}/kubelogin-linux-amd64.zip"
+      execHandle "Unpacking kubelogin" unzip kubelogin-linux-amd64.zip
+      execHandle "Moving kubelogin to bin" mv bin/linux_amd64/kubelogin /home/cloudcontrol/bin
+      cd - &>/dev/null || exit
+      rm -rf "${TEMPDIR}"
+
+      execHandle "Converting credentials to kubelogin" /home/cloudcontrol/bin/kubelogin convert-kubeconfig
+  fi
 elif [ "X$(cat /home/cloudcontrol/flavour)X" == "XawsX" ]
 then
   waitForMfaCode