Friday, December 4, 2020

Docker Compose - change COMPOSE_HTTP_TIMEOUT and verify env_file environment variable configuration options

I occasionally get the below error while running docker-compose on my local VM or while running on Jenkins.

ERROR: for cherryshoe_test_ta_run_609fc9bdd396  UnixHTTPConnectionPool(host='localhost', port=None): Read timed out. (read timeout=60)
An HTTP request took too long to complete. Retry with --verbose to obtain debug information.
If you encounter this issue regularly because of slow network conditions, consider setting COMPOSE_HTTP_TIMEOUT to a higher value (current value: 60).

CentOS Linux release 7.3.1611 (Core)
Docker version 19.03.1, build 74b1e89

You can verify this environment variable with the docker-compose config command, which prints the resolved application config to the terminal, by accessing the environment variable in the docker-compose file.   A sample docker-compose yml below is used to test this out:

version: "3"
    image: "testconfig:${COMPOSE_HTTP_TIMEOUT}"

The config command verifies the default COMPOSE_HTTP_TIMEOUT value of 60:

$ docker-compose -f docker-compose-cs.yml config
    image: testconfig:60
version: '3.0'

After using the env_file to set the value to a higher number,


#.env file for docker-compose.  Use same file for all environments.
# set COMPOSE_HTTP_TIMEOUT at docker instance level and not inside docker image.

run the config command again to verify it:

$ docker-compose -f docker-compose-cs.yml config
    image: testconfig:120
version: '3.0'

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