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The same two virtual machines (10.246.150.209 and 10.246.150.210) with Ubuntu 16.04 LTS and OpenResty installed in previous examples are used in this example. Another 4-node ECS appliance was configured as VDC 2. A replication group was created containing VDC1 and VDC2. Also, an additional virtual machine was configured with IP 10.246.150.207 to act as a global load balancer. The virtual machine was installed with Ubuntu 16.04 LTS, OpenResty, libraries, add-on modules, and dependencies similar to the other virtual machines. After setup of the global load balancer, install additional files (http.lua and http_headrs.lua) needed for the health checks for the upstream servers as shown in Figure 68. These Lua scripts provide extra functions for protection against infinite loops as well as formatting headers, parsing, and other functions.
Then, copy the SSL certificates from the other virtual machines and the prometheus.lua script into the install directories. Commands in Figure 69 assumes that ssl scripts were remotely copied to the global OpenResty server and placed in /tmp. Also download the attached nginx-sample.zip files and place into /tmp and copy them to the install directory.
The files within the gslb directory of the zip file include the following:
Next modify the DNS entry for os.ecstme.org and assign the IP of the global OpenResty server as shown in Figure 70.