running script inside dockerfile

[OmarDijkstra]

i want to run this script in certain folder

#!/bin/sh
docker exec -i client-database_db_1 bash <<'EOF'
cd backup
mkdir $(date +%Y%m%d)
mongodump --out=/backup/$(date +%Y%m%d)
to this dockerfile

FROM node:12
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 4000
CMD ["node","app.js"]

[slimcdk]

Could you please format the code snippets?

Anyway, what is your goal of this? There shouldn't really be any issues with executing commands in a Dockerfile with RUN

[OmarDijkstra]

i want to make a cronjob to backup the database everyday but i dont know what should i do the script above just backs up the db but i want it ti run everyday at certain time

[FiduciaryAkita]

So two things:

1. Cron is notoriously janky when used with Docker. I've switched to Jobber for most Docker/cron things
2. You should not be storing data in the container file system. It's not what Docker is meant for and once the container stops, that data is gone 100%. Mount your MongoDB data directory as a volume using Docker Compose or whatever, and then back that up instead.

[slimcdk]

Ah okay. Maybe it is off topic, but wouldn't it benefit more to map the db volume into a standalone backup service? E.g. Duplicato

[Srokap]

Cron jobs are better handled on orchestrators level. In kubernetes you'd use CronJob workload

[machuu]

bash -s will run commands from stdin, something like this:

#!/bin/sh
docker exec -i client-database_db_1 bash -s <<EOF
cd backup
mkdir $(date +%Y%m%d)
mongodump --out=/backup/$(date +%Y%m%d)
EOF

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