diff --git a/hosts/README.md b/hosts/README.md
index d4c6f7d4..e922db6b 100644
--- a/hosts/README.md
+++ b/hosts/README.md
@@ -7,7 +7,7 @@
    1. `ai`: My main computer, with NixOS + I5-13600KF + RTX 4090 GPU, for gaming & daily use.
    2. `aquamarine`: My NixOS virtual machine as a passby router(IPv4 only) to access the global internet.
    4. `ruby`: Another NixOS vm with R9-5900HX(8C16T), for distributed building & testing.
-   3. `kana`: Yet another NixOS vm with R7-5225U(6C12T), for desktop testing.
+   3. `kana`: Yet another NixOS vm, for various services.
 3. `rolling_girls`: My RISCV64 hosts.
    1. `nozomi`: Lichee Pi 4A, TH1520(4xC910@2.0G), 8GB RAM + 32G eMMC + 64G SD Card.
    2. `yukina`: Lichee Pi 4A(Internal Test Version), TH1520(4xC910@2.0G), 8GB RAM + 8G eMMC + 128G SD Card.
@@ -17,6 +17,19 @@
    1. `suzu`: Orange Pi 5, RK3588s(4xA76 + 4xA55), GPU(4Cores, Mail-G610), NPU(6Tops@int8), 8G RAM + 256G SSD.
 5. Homelab:
    1. `tailscale_gw`: A tailscale subnet router(gateway) for accessing my homelab remotely. NixOS VM running on Proxmox.
+6. Kubernetes Cluster(TODO):
+   1. For production:
+      1. `k8s-prod-master-1`
+      1. `k8s-prod-master-2`
+      1. `k8s-prod-master-3`
+      2. `k8s-prod-worker-1`
+      2. `k8s-prod-worker-2`
+      2. `k8s-prod-worker-3`
+   1. For testing:. 
+      1. `k8s-test-master`
+      2. `k8s-test-worker-1`
+      3. `k8s-test-worker-2`
+      4. `k8s-test-worker-3`
 
 # idols - Oshi no Ko
 
diff --git a/hosts/idols_kana/README.md b/hosts/idols_kana/README.md
new file mode 100644
index 00000000..f77753bd
--- /dev/null
+++ b/hosts/idols_kana/README.md
@@ -0,0 +1,14 @@
+# Idols - Kana
+
+TODO: use kana for various services.
+
+Services:
+
+1. restic(backup file from homelab to NAS, or from NAS to Cloud)
+2. synthing(sync file between android/macbook/PC and NAS)
+4. dashy(homepage)
+3. ddns
+4. aria2ng & transmission(file downloading)
+5. uptime-kuma(uptime monitoring)
+7. Alist(file browser for local/SMB/Cloud)
+8. excalidraw/DDTV/owncast/jitsi-meet/...