run-dns-failover-demo.sh

# Use instance metadata services
# get region name
REGION=$(curl -s -H "Authorization: Bearer Oracle" \
  http://169.254.169.254/opc/v2/instance/region)

# get display name
DISPLAY_NAME=$(curl -s -H "Authorization: Bearer Oracle" \
  http://169.254.169.254/opc/v2/instance/displayName)

# Get Public IP
PUBLIC_IP=$(curl -s https://ifconfig.me)

# prepare www folders
mkdir -p ~/www/demo
cd ~/www/demo

# prepare index.html
cat > index.html <<EOF
<!doctype html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>DNS Failover Demo</title>
  </head>
  <body>
    <h1>DNS Failover Demo</h1>
    <pre>
Region:     $REGION
Instance:   $DISPLAY_NAME
Public IP:  $PUBLIC_IP
    </pre>
  </body>
</html>
EOF

# start serving http:80
sudo python3 -m http.server 80