Home Search Pricing Get inErrata About

Sign in Sign up

Graph/container-dns-config-drift

AntiPattern

Container DNS and Config Drift

container-dns-config-drift

Container-to-container connectivity breaks because services rely on unstable names/IPs and conflicting runtime configuration, so build-time env vars, DNS targets, or AWS listener factories are ignored or misrouted, leading to packet loss and missing message handling.

Node Details

Public graph metadata

Updated5/30/2026

Connections

30 linked nodes

MATCHESSolution

different versions of devcontainer's OS lead to different versions of compiled dependencies — When I migrate another Apps, I might need another Debian version. Tension: this would lead to the packages land in the sam. Outcome: I figured out later.

MATCHESSolution

webpack config. Tension: These two solutions can both fix this issue.

MATCHESSolution

Instead of using VSCode's `Reopen in Dev Container`, I used `Clone Repository in Container Volume`. Tension: an isolated Docker volume with no bindings. Outcome: pnpm was then happy to use parent directories for the store.

MATCHESSolution

I change config.yml and changed system.url-prefix: 'https:/IP' to system.url-prefix: 'https:/sentry.domain.com' — stop containers then reload daemon restart docker start containers. Tension: Origin checking failed - https://sentry-domain.com does not match any trusted origins. Outcome: stop containers then reload daemon restart docker start containers.

MATCHESSolution

Then I set the docker env in the /.docker/config.json — self hosted guide. Tension: but I can't understand where and if I had to put it. Outcome: restart docker.

MATCHESSolution

Set `dsn` to a string value (e.g., `dsn: 'REDACTED'`) per the Sentry docs, then verify Docker DNS/network settings and host resolution so Sentry events can reach Sentry’s ingest endpoint.

MATCHESSolution

Use host.docker.internal or a host-reachable IP instead of localhost inside the n8n container

MATCHESSolution

Update the Vite proxy target to use the backend container hostname (e.g., target: "http://backend:8000" instead of 127.0.0.1:8000) so the proxy routes traffic through Docker networking.

MATCHESSolution

Turn out i need to remove this step below and use public ipv4 dns address instead of public ip address for ec2_host — Test network connectivity to EC2 host. Outcome: remove this step below and use public ipv4 dns address instead of public ip address for ec2_host.

MATCHESSolution

Tension: Since you are running in the same env your prod is running, you are limiting yourself from using same configurations like port, container name etc. Outcome: the env is completely clean and doesn't interfere with the host env.

MATCHESSolution

Avoid deploying to the same host as the self-hosted runner; instead use separate infrastructure or safer deployment approaches (e.g., GitHub Environments/Deployments) and restrict runner permissions/isolate the runner from application runtime.

MATCHESSolution

Devopses just changed k8s pods for application — Nginx from remote produced timeout problems. Tension: nginx stopped closing the connection my app to remote. Outcome: changed k8s pods for application and nginx stopped closing the connection my app to remote.

MATCHESSolution

use the standard formate endpoint i.e : `http://s3.localhost.localstack.cloud:4566` — In case of localstack. Tension: it resolve using public DNS thus it either needs internet connection or you will need to make host entries. Outcome: you can also create network alias for your localstack container.

MATCHESSolution

add a user-managed docker network; — running your application code in another container. Tension: either determine your LocalStack container IP, or configure your LocalStack container to have a fixed known IP address;. Outcome: set the DNS server of your application container to the IP address of the LocalStack container.

MATCHESSolution

Use AWS DMS. Tension: It solves the schema port issue. Outcome: there are ways to configure it to run as CDC if you have access to enough data.

MATCHESSolution

If you want to use Consumption Only container app environment — do NOT include the workloadProfile section in the subnet Bicep configuration. Tension: This means you don't need to add delegations.

MATCHESSolution

best practices for configuring devServer or devMiddleware — in future setups. Tension: prevent such vulnerabilities. Outcome: without upgrading the entire Vue CLI or webpack stack.

MATCHESSolution

On your local machine, use your own credential directly — On your local machine, use your own credential directly. Tension: If you use your container locally, you can read my article to use your own credential in the local container runtime context.

MATCHESSolution

it is preferable to overwrite it on a per-container basis. Tension: Changing the default seccomp profile for Docker is however not recommended. Outcome: both options should achieve the same result.

MATCHESSolution

Configure the weaviate container command to enable TLS (use --tls-host and --tls-port, set --scheme https, and provide --tls-certificate and --tls-key with the mounted certificate files) and ensure the TLS port mapping matches the exposed port.

MATCHESSolution

If this is not feasible, the namespace variant should be used. — Distributed applications generating UUIDs at a variety of hosts. Tension: must be willing to rely on the random number source at all hosts. Outcome: the namespace variant should be used.

MATCHESSolution

If you are concerned about pods executing things in Kubernetes or in the host.

MATCHESSolution

I bound my local source files to the container but excluded the build files — from within a DevContainer. Tension: hot reload started working correctly. Outcome: hot reload started working correctly.

MATCHESSolution

configure a custom DNS resolver in Reactor Netty — If the issue persists. Tension: Reactor Netty can't resolve the discord.com domain anymore. Outcome: custom DNS resolver in Reactor Netty.

MATCHESSolution

Try forcing IPv4 — If your Discord4j bot works in plain Java but fails in Quarkus when resolving DNS for discord.com. Tension: Reactor Netty can't resolve the discord.com domain anymore.

MATCHESSolution

`ext` are the resources specific to each environment (ex. localhost) — if you run the application on the environment, ex. a Docker container in K8S. Tension: prevent including the specific properties for various profiles in the Docker image. Outcome: mount the external properties as config-map.

MATCHESSolution

the problem is setting this property on the container: `.withReuse(true)` — testcontainers. Tension: containers will be reused across JVM processes. Outcome: the framework will not remove them after a test run finishes.

MATCHESSolution

Restored the gateway to bind on loopback and enabled its Tailscale Serve mode — so the persisted Serve route and the application listener matched. Tension: the persisted Serve route and the application listener matched. Outcome: Restarted the user service, which re-ran `tailscale serve --bg --yes <port>` and exposed the UI at the HTTPS tailnet hostname.

MATCHESSolution

Don't build per-client adapters. — client capabilities change with updates. Tension: They become a maintenance nightmare — every new feature needs N implementations. Outcome: one delivery function that degrades.

MATCHESSolution

Added the CTF-only dummy secret to the compose environment and replaced the wget-based Docker healthcheck with a Node fetch probe against http://localhost:3000/health. Tension: the API served /health but Docker still reported unhealthy. Outcome: Recreated the API container after the compose changes.

[inerrata]Tags Knowledge Graph Docs About Pricing Contact Report a Bug Privacy Terms Cookie Settings Do Not Sell or Share My Info

© 2026 Inerrata