Container
A container runs application processes in an isolated environment. It can simplify deployment, while backups and operational responsibilities remain necessary.
A container is an isolated runtime environment for application processes. It is started from a container image. In typical Linux container operations, containers share their host's kernel; each container therefore does not carry a complete separate operating system with its own kernel.
A hypothetical portal and its background worker can run in separate containers. Their application versions and dependencies can then be deployed separately. If both run on the same machine, that machine's failure can still stop both parts.
Container isolation is not a guarantee against every security problem. Data also does not persist simply because it is processed inside a container. Persistent storage, access rights, updates and recovery must be configured appropriately. Restarting a container is different from restoring lost orders from a tested backup.
Sources
Related terms
- Container imageA container image is the package used to start containers. It includes software and dependencies, but does not automatically include current business data.
- KubernetesKubernetes manages containerised applications against a declared desired state. Its value also depends on configuration and operational responsibilities.
- Return-PathReturn-Path records the SMTP reverse path in a header. It explains the technical route for error reports, not a person’s identity.
- Envelope-FromEnvelope-From identifies the SMTP sender for transport and error feedback. It must be distinguished from the visible sender address.
- DMARC aggregate reportA DMARC aggregate report summarises a reporting mail system’s domain checks over a period. It helps examine sending sources and misconfigurations.
- DMARC policyA DMARC policy describes the requested handling of failed domain checks. It repairs neither sending sources nor their alignment.
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