What methods of deploying new software versions do you know?

There are different ways to deploy new versions of software, including:

• Blue-Green Deployment: two identical environments (blue and green) are maintained. The new version is deployed in the inactive environment, and after testing, traffic is switched, minimizing downtime.
• Canary Deployment: the new version is rolled out to a small percentage of users, and after successful testing, the share gradually increases.
• Rolling Update: the update occurs in stages, with servers or containers updated in batches, ensuring continuous operation.
• Recreate Deployment: the old version is completely stopped, then the new one is started — simple but with downtime.
• A/B Testing: the new version is offered to a portion of users for effectiveness comparison.

The choice depends on requirements for availability, risks, and infrastructure.