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Overview of Observability and Monitoring
In the world of the software delivery process, Observability and Monitoring have become a relevant term, importantly when you’re discussing software development. It doesn’t matter how much hard work you put in creating good quality software applications, there will always be errors and bugs, like the rapid increase in users and the software application is becoming more complex. For all these reasons our system should be observable. The software delivery culture is changing, and it is shifting from Monitoring.
Although applications in both on-premises and cloud-native environments are expected to be highly available and resilient to failure, the methods that are used to achieve those goals are different. There are many benefits of monitoring such as improving productivity and performance; you can efficiently allocate resources according to the need of the users, you can easily detect and solve the problems before they are affecting your business. Thus, you can better allocate time and upgrade to new projects.
Observability means assembling all fragments from logs, monitoring tools and organize them in such a way which gives actionable knowledge of the whole environment, thus creating an insight. Taken from Article, Observability Working Architecture and Benefits
What is Observability?
Observability is the degree to which organizations can understand a complex system's internal state or condition based only on knowledge of the system's external outputs. The more observable a system, the faster and more accurately you can navigate from a recognized problem to its root cause without additional efforts
Observability in DevOps
The CI-CD pipeline requires each part of the pipe to be observable. Each piece of the pipeline must produce appropriate data to support automated problem detection and alerting, manual debugging when necessary, and analysis of system health (historical trends and analytics).
These are the types of data that a system should produce to be observable.
- Health checks: they are often custom HTTP endpoints, help orchestrators, like Kubernetes or Cloud Foundry, they are performed to maintain the excellent health of the system.
- Metrics: they are a numeric representation of data that is collected at regular intervals into a time series. The Numerical time series data is straightforward to store and can query quickly; it helps when looking for historical trends. Over a more extended period, numerical data can be compressed into a shorter period, for example, monthly, weekly and daily.
- Log entries: they represent discrete events. The Log entries are essential for debugging, as they often include stack traces and other contextual information that can help identify the root cause of observed failures.
- Distributed, request or end-to-end tracing: they capture the end-to-end flow of an application through the system. Tracing essentially captures both relationships between services (the services the request touched), and the structure of work through the system (synchronous or asynchronous processing, child-of or follows-from relations).
Full-featured visibility brings the AppOps and SecOps teams together to identify and address risks at times. Click to explore about, Full-Stack Observability Benefits
What is Monitoring?
Monitoring oversees the entire development lifecycle from planning, development, integration and testing, deployment, and operations. It involves a complete and real-time view of applications, services, and infrastructure status.
In the software delivery process, productive continuous monitoring activity increases productivity, performance, reduce downtime, and it allows us to allocate time and resources better, we can plan our upgrades and new projects quickly. It alerts us by giving notifications whenever there is any failure in the system before it affects our business.
Monitoring in DevOps
In DevOps, Monitoring is done by tools such as Nagios, tensible, snort, etc. It gives feedback from the production environment and produces information about an application’s performance and usage patterns.
The main aim of Monitoring is to achieve high availability by minimizing time to detect and time to mitigate. The benefit of constant Monitoring is to, Automate work that used to be manual, repetitive, and error-prone, resulting in faster speed, productivity, and scalability — and the assurance of standardized configurations across test, dev, and production environments. Eliminating errors and bugs reduce the wastage of time and let you deploy software faster and more reliably. Why does continuous Monitoring do? In general, it does the following activities.
- Problem Detection: it let you know the problems, by alerting, or seeing issues on dashboards.
- Problem Resolution: after knowing the problem, the root cause, and troubleshooting.
- Continuous Improvement: by all these, capacity planning, financial planning, trending, performance engineering, reporting we can improve the software delivery process.
What is the difference between Observability and Monitoring?
Let’s take an example of a large and complex data centre’s infrastructure system, which is monitored using log analysis and monitoring and ITSM tools. By analyzing too many data points continuously will generate large volumes of unnecessary alerts, data, and false flags. The software delivery process may have fewer observability characteristics unless the correct metrics are calculated, and the unwanted noise is carefully removed using Artificial intelligence and continuous monitoring solutions.
On the other hand, an application with a single server can be easily monitored using health checks, metrics, logs and parameters such as response time, throughput and efficiency. These parameters are widely interrelated with the health of internal system components. Therefore, the system has demonstrated high observability. Using essential tools, such as energy and temperature measurement instruments, or software-based tools or web-based continuous Monitoring, the performance, life cycle, and risk of potential performance incidents can be calculated before any negative impact on the business.
The system’s simplicity, the insightful representation of the performance metrics, and the capability of the tools to identify the correct parameters are responsible for the observability of the system. This combination yields the necessary insights to construct an accurate representation of the internal states, despite a system’s inherent complexity.
|Actively the information is gained||Information is consumed passively|
|Questions are asked on basis of hypotheses||Questions or queries are based on the data dashboards|
|In use for complex and ever dynamic Environment||In use for static with a little variation environment|
|Preferred by developers with variability and unknown permutations||Used for developers of systems with little change and know permutation|
|A system has to be designed to be observable||Any System can be monitored|
|Why my system failed?||What is the state of system|
|Generate Metrics||Collect Metrics|
We can conclude that Monitoring is similar to taking your vehicle to a mechanic for routine maintenance and when the check engine light comes on. You want to keep your vehicle running as smoothly as possible and avoid breakdowns. On the server, you want to know whether users can access your application and services and if they are performing within appropriate limitations. Notifications are sent to teams when something is not performing accurately, about to break or broken. Before notification is sent, it is crucial to create a baseline and understand the current state of the environment. And here, observability first comes in. Without observing the architecture, it is impossible to know what is wrong and what is not correct. Only by observing application, architecture, system, and service can we determine what is wrong and what is right.