apache-flink

What is Apache Flink?

The Apache Flink image packages the Flink distribution so you can run stream and batch processing jobs in containers, typically as a JobManager that coordinates the cluster and one or more TaskManagers that execute the work. Flink is a distributed engine for stateful computations over unbounded and bounded data streams, offering exactly-once processing guarantees, event-time semantics, and fault tolerance through checkpoints and savepoints. Teams use it to build real-time pipelines — fraud detection, streaming ETL, event-driven applications, and continuous analytics — using the DataStream API, Table API, and Flink SQL, with connectors for systems such as Apache Kafka. The official image is the building block for Flink on Kubernetes, including deployments managed by the Flink Kubernetes Operator, and is used by data engineering and platform teams that need a reproducible, version-pinned runtime across environments.

What is Echo's Apache Flink image?

Echo's Apache Flink image is a hardened build of Apache Flink on Echo's hardened base. Echo images are designed to be a drop-in replacement: swap the image reference in your Dockerfile or deployment manifest and CVEs go to zero without disrupting your flink-conf settings, checkpoint storage, connectors, and job submission. Every image is tested across clouds, image use cases, and deployment targets. Echo ships every image in two variants:

• Distroless variant — optimized for runtime use, with the smallest possible attack surface
• Default variant — includes essential build tools, package managers, and shells for teams that need operational access

For production Apache Flink deployments, the distroless variant keeps all runtime operations — job scheduling, state management, checkpointing, and task execution — fully intact while minimizing exposure; the default variant suits data engineering and platform teams that need shell access for inspecting job state, adding connector JARs, or debugging cluster behavior.

What is the difference between Echo's Apache Flink image and the public Apache Flink image?

Public Apache Flink images ship on bases that include OS-level tooling convenient for development but which contribute CVEs that accumulate on a stream processing runtime used in production. Apache Flink images run continuously with access to streaming data, checkpoint and savepoint state, and credentials for connected systems. OS-level CVEs in the base image — particularly in libraries such as openssl, zlib, and the libraries bundled with the JVM runtime — create exploitable paths that bypass application-layer controls entirely, allowing attackers to move from a network-reachable service to host-level access. For teams running Apache Flink across many environments, the image is also a steady source of scanner noise in the CI pipeline — every package in the base becomes a finding your security team must triage, even when none of it is reachable from the service. Echo's build retains everything Apache Flink needs for job scheduling, state management, checkpointing, and task execution while removing the packages that don't belong in a production Apache Flink stream processing runtime. As we covered in our post on how to protect your company from software supply chain attacks, long-running services that hold sensitive data and listen on the network are among the widest attack surfaces in the container stack. Echo commits to a 7-day SLA for critical and high severity vulnerabilities, and 10 days for medium, low, and unknown — with vulnerabilities triaged within 24 hours. Echo images are recognized by all major scanners and mirrored to all major registries, so they fit into existing pipelines without changing your registry, scanner, or runtime tooling.

FAQ

Can I replace my Apache Flink image with Echo's Apache Flink image?

Yes. Echo's Apache Flink image is a drop-in replacement. Update the FROM line in your Dockerfile and your workloads keep running. JobManager and TaskManager configuration, checkpoint and savepoint storage, connector JARs, and Flink Kubernetes Operator deployments all continue to work without changes to your jobs or cluster manifests.

Is Echo's Apache Flink image FIPS-validated?

Yes. Echo's FIPS-validated images use cryptographic modules with an active FIPS 140-3 CMVP certificate, making them fit for federal use — unlike FIPS-compliant images that haven't been validated. This matters for teams running Apache Flink workloads inside FedRAMP boundaries, where a stream processing runtime that processes continuous data streams and connects to external data systems must meet cryptographic requirements across the full stack — including the OpenSSL and TLS libraries bundled with the Apache Flink image.

What is Echo's vulnerability management SLA on the Apache Flink image?

Echo commits to a 7-day SLA for critical and high severity vulnerabilities, and 10 days for medium, low, and unknown — with vulnerabilities triaged within 24 hours. Patches are mirrored automatically into your private registry so you're always running a clean version — critical for a long-running service that holds streaming data, checkpoint and savepoint state, and credentials for connected systems and is reachable over the network.

Is Echo's Apache Flink image distroless?

Echo ships every image in two variants: a distroless variant optimized for runtime use, and a default variant that includes essential build tools, package managers, and shells. For production Apache Flink deployments, the distroless variant is the leaner, more secure choice; for data engineering and platform teams that need shell access for inspecting job state, adding connector JARs, or debugging cluster behavior, the default variant is the right fit.

How does Echo achieve such a drastic CVE reduction in Apache Flink?

Echo's Apache Flink image is built from source with only the absolute essentials needed to run the Apache Flink stream processing runtime, which significantly shrinks the attack surface. Echo also patches aggressively over time, with backports available so you can stay on the Apache Flink version your applications and their dependencies are certified against — avoiding a disruptive upgrade forced purely by OS-level vulnerabilities in the base image rather than by your own requirements.

Will Echo's Apache Flink image help us achieve FedRAMP?

Yes. The hard parts of FedRAMP — managing vulnerabilities, applying fixes, and using FIPS-validated cryptography — are baked into Echo images, including STIG-hardened configuration and ConMon/POA&M-ready reporting. For data engineering and platform teams running Apache Flink under an ATO — whether that's a real-time fraud pipeline, a streaming ETL platform, or an event-driven analytics system handling government data — Echo's hardened Apache Flink image keeps the stream processing runtime layer in-boundary and compliant without requiring custom hardening scripts or manual base image patching between compliance cycles.

‍