Visibility into the service mesh with the help of proper tools is a necessity if you wish to resolve issues quickly. In the absence of appropriate tools, it becomes very time-consuming and expensive to find out the source of the problems. In Chapter 16, Exploring the Reliability Features of Linkerd, we used the Linkerd dashboard to debug a particular route, which showed a success rate of less than 100%. This information about a specific route is of great help and acts as a feedback loop for the developer so that they can fix issues.
The Linkerd dashboard (GUI) and the Linkerd CLI (command line) are two essential tools if we want to gain insight into the service mesh. These tools show key indicators such as live traffic, success rate, routes, latencies, and an overview of traffic flow from individual sources to different targets. These are...