Какими средствами можно бороться с downtime, сократить его?

The following approaches and tools are used to combat downtime and reduce it:

• Monitoring and alerting: timely detection of problems using monitoring systems (Prometheus, Grafana, Zabbix).
• Automatic recovery: using orchestrators (Kubernetes, Nomad) to restart failed services.
• Redundancy and fault tolerance: setting up clusters, data replication, load balancing.
• Gradual deployments and canary releases: updating services gradually without stopping the entire system.
• Scheduled maintenance: performing updates and migrations at pre-agreed times with minimal impact.
• Fault tolerance testing: conducting chaos engineering (e.g., using Chaos Monkey) to identify weak points.

Example: in Kubernetes, you can configure readiness and liveness probes so that the system automatically removes non-working pods from load and restarts them, minimizing downtime.