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42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
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## Wait for another service
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`./wait-for` is a script designed to synchronize services like docker containers. It is [sh](https://en.wikipedia.org/wiki/Bourne_shell) and [alpine](https://alpinelinux.org/) compatible.
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`./wait-for` has been inspired by [vishnubob/wait-for-it](https://github.com/vishnubob/wait-for-it), but the core has been rewritten at [Eficode](http://eficode.com/).
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## Usage
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```
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./wait-for host:port [-t timeout] [-- command args]
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-q | --quiet Do not output any status messages
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-t TIMEOUT | --timeout=timeout Timeout in seconds, zero for no timeout
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-- COMMAND ARGS Execute command with args after the test finishes
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```
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## Examples
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To check if [eficode.com](https://eficode.com) is available:
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```
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$ ./wait-for www.eficode.com:80 -- echo "Eficode site is up"
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Connection to www.eficode.com port 80 [tcp/http] succeeded!
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Eficode site is up
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```
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To wait for database container to become available:
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```
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version: '2'
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services:
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db:
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image: postgres:9.4
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backend:
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build: backend
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command: sh -c './wait-for db:5432 -- npm start'
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depends_on:
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- db
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```
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