Open source APM: OpenTelemetry traces, metrics, and logs
...It provides a unified view of the entire technology stack, enabling you to monitor the performance, availability, and health of your systems in real-time. Uptrace allows to monitor your whole application stack on a compact and informative dashboard. You get a quick overview for all your services, hosts, and systems.
...Celery has a large and diverse community of users and contributors, you should come join us on IRC or our mailing-list. Celery is Open Source and licensed under the BSD License. A task queue’s input is a unit of work called a task. Dedicated worker processes constantly monitor task queues for new work to perform. Celery communicates via messages, usually using a broker to mediate between clients and workers. To initiate a task the client adds a message to the queue, the broker then delivers that message to a worker. A Celery system can consist of multiple workers and brokers, giving way to high availability and horizontal scaling. ...
Server monitor is a java based application that monitors Servers for service availability. As soon as any server stops responding, an SMS is sent to Administrator about server failure.
ServerSpy is a VB.Net based application that installs as a service and serves to monitor uptime and availability of other networked servers and web sites.
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