It happened once that it was tantamount to spying into a system of an unsuspecting neighborhood. You would visit a few of the servers, check CPU or memory, and decide that nothing was wrong at the end of the day. Those days are long gone. The new environment of a cloud-native system is far more dynamic and unpredictable. Several seconds are spent before containers move in and out. Inter-cloud transversal microservices clusters. The virtual networks have a journey in a network created by twisting and turning traffic patterns. The classic surveillance that was adapted to operate in more stable and passive environments just cannot keep pace with this new speed. What a cloud-native world proves is that it all is on the move, growing, living and dying in a manner that cannot fit in the small dashboards used in the olden days. These are not the only reasons which should be checked to understand such a system. We require observability to an extent that we can see the whole narrative behind each request, each container and each network modification. Then it is that the puzzle starts. From Watching to Understanding From Watching to Understanding There is classical monitoring that informs you that one of your servers is not responding or your application is using excessive memory. It is effective where the possibilities of things going wrong are already known. Cloud-native applications are running on a new wavelength. They produce huge quantities of telemetry in containers, virtual machines and orchestration systems. In services, such interactions are more variable, and failure modes therefore cannot be predicted at all. Observability enters and makes the unknown visible. Observability tools do not simply collect superficial symptoms but instead collect logs, metrics and traces that can be used to see the flow of a request through the system, and how every single part of the system is handling it. Not only do you start to realize that something has gone wrong but also how the issue has spread to other parts of the network. This is an understanding that a world that is enormously changing needs to have. The Heartbeat of a Distributed Network The Heartbeat of a Distributed Network Think of how hard it would be to listen to people in a full room where someone interrupts at any point and people are talking over each other. The one that looks like that is the behind-the-scenes cloud-native network. Observability tools gather the pieces of information scattered apart and reconstruct the conversation. Metrics are used to determine how well a service performs at a given time. The information about the system’s dynamics is recorded in logs. Traces show the overall path of any request as far into the system as it has reached and as it is fully formed. A combination of these signals means that observability is a living map of the system. You are able to see the dependencies of services, how latency within the network is potentially compromising performance, and how the performance of one region is affecting the rest. That is not the case in conventional monitoring. It was not intended to capture high-speed behavior or encode the relationships among hundreds of interacting services. When Automation Joins the Conversation When Automation Joins the Conversation Cloud-native observability extends beyond information gathering. The intelligent features are overlaid on contemporary platforms in such a way that they are able to detect patterns that are not normal before teams even know that something is out of the ordinary. Slowdowns or errors and the gaps between metrics and events across various sources can be automatically compared by these systems. This is why it is called a feedback loop, which is conceptually identical to having a second pair of eyes always watching the system. Such automated intelligence proves to be very beneficial in a large environment where teams may get overwhelmed by the volume of telemetry. Engineers have an opportunity to concentrate on the actual problems that are most significant instead of scanning gigantic logs. Observability is also a guide and a filter that aids in separating the noise from the signal. The Reality of Modern Complexity The Reality of Modern Complexity Naturally, it will not be cheap to maintain. Cloud environments are producing huge amounts of data, and the choice of what data to store and sample is a trade-off. Certain monitoring tools can give you a piecemeal image unless it is all located within one observability layer. The privacy problem is also present, since there might be certain confidential information in logs and traces that must be approached with care. These are, however, sufficient to calculate observability as significant as well. The cloud-based networks are not getting easier. The workloads will be transferred to other platforms. There will be additional automation. The pressure on the computer systems will build up. Absence of monitoring results in organizations being in a turbulent environment without sight. A New Era of Insight A New Era of Insight The new thinking and strategy of operating with software is cloud-native network observability. It is not only focused on the failures of individuals but the whole dynamism of a dynamical system. Observability enables the teams to bask in the view that they need to be able to develop resilient applications in the turbulent environment, to know what is occurring and why. The existence of the old system of monitoring does not vanish, it only becomes insufficient. The future lies in systems that are self-explanatory. Listening is observability.
