From 5208cab72e091f904b76ef7a575f639c12489b81 Mon Sep 17 00:00:00 2001
From: Fred Hsu <fredlhsu@gmail.com>
Date: Tue, 26 Jun 2018 18:23:59 -0700
Subject: [PATCH] Making ip addresses of controllers a variable

---
 docs/04-certificate-authority.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/04-certificate-authority.md b/docs/04-certificate-authority.md
index f8842d9..28b21b6 100644
--- a/docs/04-certificate-authority.md
+++ b/docs/04-certificate-authority.md
@@ -322,11 +322,16 @@ cat > kubernetes-csr.json <<EOF
 }
 EOF
 
+for i in 0 1 2; do
+  declare CONTROLLER_${i}=$(gcloud compute instances describe controller-$i \
+    --format 'value(networkInterfaces[0].networkIP)');
+done
+
 cfssl gencert \
   -ca=ca.pem \
   -ca-key=ca-key.pem \
   -config=ca-config.json \
-  -hostname=10.32.0.1,10.240.0.10,10.240.0.11,10.240.0.12,${KUBERNETES_PUBLIC_ADDRESS},127.0.0.1,kubernetes.default \
+  -hostname=10.32.0.1,${CONTROLLER_0},${CONTROLLER_1},${CONTROLLER_2},${KUBERNETES_PUBLIC_ADDRESS},127.0.0.1,kubernetes.default \
   -profile=kubernetes \
   kubernetes-csr.json | cfssljson -bare kubernetes