There’s a fairly common pattern of using an entrypoint script to do some initial setup, and then use exec $@ to run the container’s command as the main process. This lets you, for example, use the wait-for-it.sh script to wait for the backend to be up, then run whatever the main command happens to be.
In this article we will explore 3 issues: What is docker? Why is it so attractive? Steps to build a Rails application using docker. Add entrypoint and wait- for-it.sh I. What is Docker? Why is it so attractive? 1.1. What is docker? Docker is a tool designed to make creating, deploying and running applications easy to […], and wait-for-it.sh is obtained from https://github.com/vishnubob/wait-for-it/blob/master/wait-for-it.sh, and the Dockerfile reads FROM wrouesnel/postgres_exporter COPY wait-for-it.sh wait-for-it.sh ENTRYPOINT [./wait-for-it.sh, db:5432, –, ./postgres_exporter], 3/5/2018 · Depending on your setup, you might also copy wait-for-it.sh in as a mounted volume, such as this: version: ‘3’ services: hello-world: image: ubuntu volumes: – ./wait-for-it.sh:/usr/local/bin/wait-for-it.sh command: – wait-for-it.sh – github.com:80 – — – echo -.
wait-for-it. wait- for-it.sh is a pure bash script that will wait on the availability of a host and TCP port. It is useful for synchronizing the spin-up of interdependent services, such as linked docker containers. Since it is a pure bash script, it does not have any external dependencies.
12/23/2019 · Ta thêm wait-for-it.sh vào folder scripts ?? ?i?u khi?n m?i th? ???c kh?i t?o tr??c khi kh?i ??ng container. B?n có th? ??c và tìm hi?u file script wait-for-it.sh t?i ?ây. Th? hai là scripts/entrypoint. File này dùng ?? ch?y các các l?nh khi b?n ch?y docker compose up. B?n theo dõi các command trong code d??i nhé.
COPY wait-for-it.sh wait-for-it .sh : RUN chmod +x wait-for-it .sh: ENTRYPOINT [ /bin/bash, -c ] CMD [./wait-for-it.sh , [ENTER YOUR ENDPOINT HERE] , –strict , –timeout=300 , — , YOUR REAL START COMMAND]
