Functions, operands and system variables such as ABS(), AND, ATN(), ASC(), COS(), EXP(), FN(), FRE(), INT(), LEN() LOG(), NOT, PEEK(), POS(), OR, RND(), SGN(), SIN(), SQR(), STATUS (ST), TAN(), TIME (TI) or VAL() are possible. The definition may contain any legitimate mathematical expression consisting of mathematical and logical operands, functions and variables which finally results in a numeric value. The BASIC-command DEF defines a function with exactly one single numeric argument which can be executed with FN afterwards. General Programming-Syntax: DEF FN (parameter name)= You cannot use Dry Run mode with a command that doesn’t change the state of a Compose stack such as ps, ls, logs for example.Remark: This article describes the BASIC command DEF in BASIC V2 on the Commodore 64. The db service is started, and the backend and proxy wait until the db service is healthy before starting.ĭry Run mode works with almost all commands. ✔ DRY-RUN MODE - Container nginx-golang-mysql-proxy-1 Started Startedįrom the example above, you can see that the first step is to pull the image defined by db service, then build the backend service. ✔ DRY-RUN MODE - Container nginx-golang-mysql-backend-1 Started 0.0s ✔ DRY-RUN MODE - Container nginx-golang-mysql-db-1 Healthy 0.5s ✔ DRY-RUN MODE - Container nginx-golang-mysql-proxy-1 Created 0.0s ✔ DRY-RUN MODE - Container nginx-golang-mysql-backend-1 Created 0.0s ✔ DRY-RUN MODE - Container nginx-golang-mysql-db-1 Created 0.0s ✔ DRY-RUN MODE - Network nginx-golang-mysql_default Created 0.0s ✔ DRY-RUN MODE - => => naming to nginx-golang-mysql-backend 0.0s ✔ DRY-RUN MODE - build service backend 0.0s $ docker compose -dry-run up -build -d Pulling 1/1 Use -dry-run flag to test a command without changing your application stack state.ĭry Run mode shows you all the steps Compose applies when executing a command, for example: Setting the COMPOSE_IGNORE_ORPHANS environment variable to true will stop docker compose from detecting orphanedĬontainers for the project. If flags are explicitly set on the command line, the associated environment variable is ignored. Setting the COMPOSE_FILE environment variable is equivalent to passing the -f flag,ĬOMPOSE_PROJECT_NAME environment variable does the same as the -p flag,ĬOMPOSE_PROFILES environment variable is equivalent to the -profiles flagĪnd COMPOSE_PARALLEL_LIMIT does the same as the -parallel flag. You can set environment variables for various docker compose options, including the -f, -p and -profiles flags. Parallelism can also be set by the COMPOSE_PARALLEL_LIMIT environment variable. This can also be used to control build concurrency. Use -parallel to specify the maximum level of parallelism for concurrent engine calls.Ĭalling docker compose -parallel 1 pull will pull the pullable images defined in the Compose file Profiles can also be set by COMPOSE_PROFILES environment variable. with docker compose -profile frontend -profile debug up the profiles frontend and debug will be enabled. You can also enable multiple profiles, e.g. Use -profile to specify one or more active profilesĬalling docker compose -profile frontend up will start the services with the profile frontend and services $ docker compose -p my_project ps -a NAME SERVICE STATUS PORTSĭemo_1 | PING localhost (127.0.0.1): 56 data bytesĭemo_1 | 64 bytes from 127.0.0.1: seq=0 ttl=64 time=0.095 ms Get the postgres image for the db service from anywhere by using the -f flag as follows: You can use a command like docker compose pull to Have a compose.yaml file in a directory called sandbox/rails. You can use the -f flag to specify a path to a Compose file that is not located in the current directory, eitherįrom the command line or by setting up a COMPOSE_FILE environment variable in your shell or in an environment file.įor an example of using the -f option at the command line, suppose you are running the Compose Rails sample, and Specifying a path to a single Compose file If you don’t provide this flag on the command line, Compose traverses the working directoryĪnd its parent directories looking for a compose.yaml or docker-compose.yaml file. When stdin is used all paths in theĬonfiguration are relative to the current working directory. Use a -f with - (dash) as the filename to read the configuration from stdin. You can use the -project-directory option to override this base path. When you use multiple Compose files, all paths in the files are relative to the first configuration file specified
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