🏭️ Refactor deployment scripts for monokube/polykube

Break out kubernetes package installation and kubeadm invocation
to two different steps, so that we can install kubernetes packages
without setting up the cluster (for the new DMUC labs).

prepare-labs/lib/commands.sh

@@ -421,9 +421,22 @@ _cmd_kubebins() {
     need_tag
 
     ##VERSION##
-    ETCD_VERSION=v3.4.13
-    K8SBIN_VERSION=v1.19.11 # Can't go to 1.20 because it requires a serviceaccount signing key.
-    CNI_VERSION=v0.8.7
+    if [ "$KUBEVERSION" = "" ]; then
+        KUBEVERSION="$(curl -fsSL https://cdn.dl.k8s.io/release/stable.txt | sed s/^v//)"
+    fi
+
+    case "$KUBEVERSION" in
+    1.19.*)
+      ETCD_VERSION=v3.4.13
+      CNI_VERSION=v0.8.7
+      ;;
+    *)
+      ETCD_VERSION=v3.5.9
+      CNI_VERSION=v1.3.0
+      ;;
+    esac
+
+    K8SBIN_VERSION="v$KUBEVERSION"
     ARCH=${ARCHITECTURE-amd64}
     pssh --timeout 300 "
     set -e
@@ -447,13 +460,12 @@ _cmd_kubebins() {
     "
 }
 
-_cmd kube "Setup kubernetes clusters with kubeadm (must be run AFTER deploy)"
-_cmd_kube() {
+_cmd kubepkgs "Install Kubernetes packages (kubectl, kubeadm, kubelet)"
+_cmd_kubepkgs() {
     TAG=$1
     need_tag
 
     if [ "$KUBEVERSION" ]; then
-        CLUSTER_CONFIGURATION_KUBERNETESVERSION='kubernetesVersion: "v'$KUBEVERSION'"'
         pssh "
         sudo tee /etc/apt/preferences.d/kubernetes <<EOF
 Package: kubectl kubeadm kubelet
@@ -480,6 +492,18 @@ EOF"
     kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl &&
     echo 'alias k=kubectl' | sudo tee /etc/bash_completion.d/k &&
     echo 'complete -F __start_kubectl k' | sudo tee -a /etc/bash_completion.d/k"
+}
+
+_cmd kubeadm "Setup kubernetes clusters with kubeadm"
+_cmd_kubeadm() {
+    TAG=$1
+    need_tag
+
+    if [ "$KUBEVERSION" ]; then
+        CLUSTER_CONFIGURATION_KUBERNETESVERSION='kubernetesVersion: "v'$KUBEVERSION'"'
+        IGNORE_SYSTEMVERIFICATION="- SystemVerification"
+        IGNORE_SWAP="- Swap"
+    fi
 
     # Install a valid configuration for containerd
     # (first, the CRI interface needs to be re-enabled;
@@ -500,6 +524,8 @@ bootstrapTokens:
 nodeRegistration:
   ignorePreflightErrors:
   - NumCPU
+  $IGNORE_SYSTEMVERIFICATION
+  $IGNORE_SWAP
 ---
 kind: JoinConfiguration
 apiVersion: kubeadm.k8s.io/v1beta3
@@ -511,6 +537,8 @@ discovery:
 nodeRegistration:
   ignorePreflightErrors:
   - NumCPU
+  $IGNORE_SYSTEMVERIFICATION
+  $IGNORE_SWAP
 ---
 kind: KubeletConfiguration
 apiVersion: kubelet.config.k8s.io/v1beta1

prepare-labs/settings/admin-monokube.env

@@ -0,0 +1,26 @@
+CLUSTERSIZE=1
+
+CLUSTERPREFIX=monokube
+
+# We're sticking to this in the first DMUC lab,
+# because it still works with Docker, and doesn't
+# require a ServiceAccount signing key.
+KUBEVERSION=1.19.11
+
+USER_LOGIN=k8s
+USER_PASSWORD=training
+
+STEPS="
+  wait
+  standardize
+  clusterize
+  tools
+  docker
+  disabledocker
+  createuser
+  webssh
+  tailhist
+  kubebins
+  kubetools
+  ips
+"

prepare-labs/settings/admin-oldversion.env

@@ -18,7 +18,8 @@ STEPS="
   createuser
   webssh
   tailhist
-  kube
+  kubepkgs
+  kubeadm
   kubetools
   kubetest
 "

prepare-labs/settings/admin-polykube.env

@@ -1,6 +1,6 @@
-CLUSTERSIZE=1
+CLUSTERSIZE=3
 
-CLUSTERPREFIX=dmuc
+CLUSTERPREFIX=polykube
 
 USER_LOGIN=k8s
 USER_PASSWORD=training
@@ -10,12 +10,10 @@ STEPS="
   standardize
   clusterize
   tools
-  docker
-  disabledocker
+  kubepkgs
   createuser
   webssh
   tailhist
-  kubebins
   kubetools
   ips
 "

prepare-labs/settings/admin-test.env

@@ -14,7 +14,8 @@ STEPS="
   createuser
   webssh
   tailhist
-  kube
+  kubepkgs
+  kubeadm
   kubetools
   kubetest
-"
+"

prepare-labs/settings/kubernetes.env

@@ -14,7 +14,8 @@ STEPS="
   createuser
   webssh
   tailhist
-  kube
+  kubepkgs
+  kubeadm
   kubetools
   kubetest
-"
+"

prepare-labs/settings/largekube.env

@@ -15,7 +15,8 @@ STEPS="
   createuser
   webssh
   tailhist
-  kube
+  kubepkgs
+  kubeadm
   kubetools
   kubetest
 "

prepare-labs/setup-admin-clusters.sh

@@ -7,7 +7,7 @@ STUDENTS=2
 #export TF_VAR_location=eu-north-1
 export TF_VAR_node_size=S
 
-SETTINGS=admin-dmuc
+SETTINGS=admin-monokube
 TAG=$PREFIX-$SETTINGS
 ./labctl create \
 	--tag $TAG \
@@ -15,15 +15,7 @@ TAG=$PREFIX-$SETTINGS
 	--settings settings/$SETTINGS.env \
 	--students $STUDENTS
 
-SETTINGS=admin-kubenet
-TAG=$PREFIX-$SETTINGS
-./labctl create \
-	--tag $TAG \
-	--provider $PROVIDER \
-	--settings settings/$SETTINGS.env \
-	--students $STUDENTS
-
-SETTINGS=admin-kuberouter
+SETTINGS=admin-polykube
 TAG=$PREFIX-$SETTINGS
 ./labctl create \
 	--tag $TAG \