Docker Config Reference (docker attach)

Example 1

docker attach mycontainer

This command attaches the current terminal's standard input, output, and error streams to the running container named "mycontainer". It allows interactive access to the container's primary process, such as a shell, enabling real-time input and observation of output. Detachment is possible using the default escape sequence (CTRL-p CTRL-q) without terminating the container.

Example 2

docker attach --detach-keys="ctrl-x,ctrl-x" appcont

This command attaches to the container "appcont" while customizing the detachment key sequence to CTRL-x followed by CTRL-x. This modification prevents accidental detachment in environments where the default keys conflict with application shortcuts, maintaining session control during interactive debugging.

Example 3

docker attach --no-stdin dbcontainer

This attaches to the "dbcontainer" but disables standard input forwarding, allowing only output and error streams to be viewed. It is useful for monitoring logs from a database process without risking unintended input that could alter the container's state.

Example 4

docker attach --sig-proxy=false webserver

This command attaches to the "webserver" container and disables signal proxying, meaning host signals (e.g., CTRL-c) are not forwarded to the container's process. This prevents accidental termination of the container during monitoring sessions.

Example 5

docker attach e3f2a1b3c4d5

This attaches to a container specified by its partial ID "e3f2a1b3c4d5". It provides flexibility when container names are unknown or lengthy, enabling quick access for troubleshooting via ID obtained from docker ps.

Example 6

docker attach --detach-keys="ctrl-a,d" loggercont

This attaches to "loggercont" with a custom detachment sequence of CTRL-a followed by 'd'. It is suitable for logging applications where frequent attachment/detachment occurs, customizing keys to align with user preferences.

Example 7

docker attach --no-stdin --sig-proxy=false monitor

This combines options to attach to "monitor" without input or signal proxying, ideal for passive observation of output from monitoring tools without interaction risks.

Example 8

docker attach queueworker

This attaches to the "queueworker" container, typically used for background processes like message queues, allowing inspection of processing logs in real time.

Example 9

docker attach --detach-keys="ctrl-p,ctrl-q" defaultcont

This explicitly sets the default detachment keys for "defaultcont", reinforcing standard behavior in scripts where key consistency is required across environments.

Example 10

docker attach api-service

This attaches to the "api-service" container, enabling interaction with an API server's console for debugging requests or responses during development.

Example 11

docker attach --no-stdin cacheserver

This attaches to "cacheserver" without input, useful for viewing cache hit/miss logs from services like Redis without altering cache states.

Example 12

docker attach --sig-proxy=true frontend

This enables signal proxying (default behavior) for "frontend", allowing host interruptions to propagate, which is helpful for testing graceful shutdowns in web applications.

Example 13

docker attach backendproc

This attaches to "backendproc" for backend processes, providing a window into computational tasks or batch jobs running in the container.

Example 14

docker attach --detach-keys="ctrl-c,ctrl-c" interruptcont

This sets a double CTRL-c detachment for "interruptcont", mimicking interrupt behaviors while avoiding container stops in interactive sessions.

Example 15

docker attach scheduler

This attaches to a "scheduler" container, allowing monitoring of timed tasks or cron jobs executing within the environment.

Example 16

docker attach --no-stdin notifier

This views output from "notifier" without input, suitable for notification services where logs indicate sent alerts or errors.

Example 17

docker attach gateway

This attaches to a "gateway" container, facilitating inspection of traffic routing or proxy logs in networked applications.

Example 18

docker attach --sig-proxy=false processor

This disables signals for "processor", preventing disruptions during attachment to long-running data processing tasks.

Example 19

docker attach renderer

This attaches to "renderer" for rendering engines, allowing real-time viewing of output from graphics or report generation processes.

Example 20

docker attach --detach-keys="ctrl-z,z" optimizer

This customizes detachment to CTRL-z followed by 'z' for "optimizer", useful in optimization algorithms where standard keys might interfere.

Example 21

docker attach validator

This attaches to "validator" for validation services, enabling observation of input checks or compliance logs.

Example 22

docker attach --no-stdin indexer

This monitors "indexer" output without input, ideal for search indexing processes to track progress or errors.

Example 23

docker attach archiver

This attaches to "archiver" for archiving tasks, providing insights into data compression or storage operations.

Example 24

docker attach --sig-proxy=true transformer

This proxies signals to "transformer", allowing controlled interruptions in data transformation pipelines.

Example 25

docker attach integrator

This attaches to "integrator" for integration services, monitoring API calls or data merges in real time.

Example 26

docker attach --detach-keys="ctrl-b,b" exporter

This sets CTRL-b followed by 'b' for detachment in "exporter", tailored for export tasks in data workflows.

Example 27

docker attach importer

This attaches to "importer" for import processes, enabling log inspection during data ingestion.

Example 28

docker attach --no-stdin aggregator

This views "aggregator" output without input, useful for aggregation services compiling metrics.

Example 29

docker attach distributor

This attaches to "distributor" for distribution logic, allowing tracking of content or task dissemination.

Example 30

docker attach --sig-proxy=false collector

This disables signals for "collector", ensuring uninterrupted attachment to data collection processes.