diff --git a/group_vars/k3s/vars.yml b/group_vars/k3s/vars.yml
new file mode 100644
index 0000000..4ab12a5
--- /dev/null
+++ b/group_vars/k3s/vars.yml
@@ -0,0 +1,2 @@
+---
+server_admin: "admin+k3s@netz39.de"
diff --git a/host_vars/k3s-c1.n39.eu/vars.yml b/host_vars/k3s-c1.n39.eu/vars.yml
new file mode 100644
index 0000000..ef8c858
--- /dev/null
+++ b/host_vars/k3s-c1.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "1E:63:F3:95:09:40"
diff --git a/host_vars/k3s-c2.n39.eu/vars.yml b/host_vars/k3s-c2.n39.eu/vars.yml
new file mode 100644
index 0000000..f3ac1db
--- /dev/null
+++ b/host_vars/k3s-c2.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "1E:7C:3B:46:89:6B"
diff --git a/host_vars/k3s-c3.n39.eu/vars.yml b/host_vars/k3s-c3.n39.eu/vars.yml
new file mode 100644
index 0000000..eb7351a
--- /dev/null
+++ b/host_vars/k3s-c3.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "92:01:40:6D:F6:68"
diff --git a/host_vars/k3s-w1.n39.eu/vars.yml b/host_vars/k3s-w1.n39.eu/vars.yml
new file mode 100644
index 0000000..cd6e098
--- /dev/null
+++ b/host_vars/k3s-w1.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "12:D8:CD:E4:69:2A"
diff --git a/host_vars/k3s-w2.n39.eu/vars.yml b/host_vars/k3s-w2.n39.eu/vars.yml
new file mode 100644
index 0000000..85f29e2
--- /dev/null
+++ b/host_vars/k3s-w2.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "22:A3:55:21:C2:86"
diff --git a/host_vars/k3s-w3.n39.eu/vars.yml b/host_vars/k3s-w3.n39.eu/vars.yml
new file mode 100644
index 0000000..e03f15e
--- /dev/null
+++ b/host_vars/k3s-w3.n39.eu/vars.yml
@@ -0,0 +1,2 @@
+---
+mac: "1A:1F:1B:40:18:E6"
diff --git a/inventory.yml b/inventory.yml
index b2ed6cc..ef482de 100644
--- a/inventory.yml
+++ b/inventory.yml
@@ -11,6 +11,12 @@ all:
     pottwal.n39.eu:
     radon.n39.eu:
     unicorn.n39.eu:
+    k3s-c1.n39.eu:
+    k3s-c2.n39.eu:
+    k3s-c3.n39.eu:
+    k3s-w1.n39.eu:
+    k3s-w2.n39.eu:
+    k3s-w3.n39.eu:
 
   children:
     docker_host:
@@ -28,6 +34,12 @@ all:
         pottwal.n39.eu:
         radon.n39.eu:
         unicorn.n39.eu:
+        k3s-c1.n39.eu:
+        k3s-c2.n39.eu:
+        k3s-c3.n39.eu:
+        k3s-w1.n39.eu:
+        k3s-w2.n39.eu:
+        k3s-w3.n39.eu:
     location_space:
       hosts:
         beaker.n39.eu:
@@ -40,6 +52,20 @@ all:
         radon.n39.eu:
         wittgenstein.n39.eu:
         unicorn.n39.eu:
+        k3s-c1.n39.eu:
+        k3s-c2.n39.eu:
+        k3s-c3.n39.eu:
+        k3s-w1.n39.eu:
+        k3s-w2.n39.eu:
+        k3s-w3.n39.eu:
     location_internet:
       hosts:
         tau.netz39.de:
+    k3s:
+      hosts:
+        k3s-c1.n39.eu:
+        k3s-c2.n39.eu:
+        k3s-c3.n39.eu:
+        k3s-w1.n39.eu:
+        k3s-w2.n39.eu:
+        k3s-w3.n39.eu: