Better ephemeral workspace support with Codespaces

Signed-off-by: GitHub <noreply@github.com>

developer-workspace/gitpod/prepare-k3s.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+script_dirname="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+rootfslock="${script_dirname}/_output/rootfs/rootfs-ready.lock"
+k3sreadylock="${script_dirname}/_output/rootfs/k3s-ready.lock"
+
+if test -f "${k3sreadylock}"; then
+    exit 0
+fi
+
+cd $script_dirname
+
+function waitssh() {
+  while ! nc -z 127.0.0.1 2222; do   
+    sleep 0.1
+  done
+  ./ssh.sh "whoami" &>/dev/null
+  if [ $? -ne 0 ]; then
+    sleep 1
+    waitssh
+  fi
+}
+
+function waitrootfs() {
+  while ! test -f "${rootfslock}"; do
+    sleep 0.1
+  done
+}
+
+echo "🔥 Installing everything, this will be done only one time per workspace."
+
+echo "Waiting for the rootfs to become available, it can take a while, open the terminal #2 for progress"
+waitrootfs
+echo "✅ rootfs available"
+
+echo "Waiting for the ssh server to become available, it can take a while, after this k3s is getting installed"
+waitssh
+echo "✅ ssh server available"
+
+./ssh.sh "curl -sfL https://get.k3s.io | sh -"
+
+mkdir -p ~/.kube
+./scp.sh root@127.0.0.1:/etc/rancher/k3s/k3s.yaml ~/.kube/config
+
+echo "✅ k3s server is ready"
+touch "${k3sreadylock}"
+
+# safety wait for cluster availability
+sleep 30s