[{"id":"cG9zdDozNDM=","slug":"backup-mongodb-inside-of-docker-the-right-way","title":"Backup MongoDB inside of Docker the easy way","content":"\n

Backing up a mongo instance is more confusing than it should be. Maybe you have run into a the input device is not a TTY or you simply don’t know how to do it? Here are two 1-Liner to backup and restore a running mongo instance.

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\"\" — Photo by Tobias Fischer on Unsplash

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Setup

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First we define our mongo instance like below. Notice that instead of mapping the data directory onto our filesystem we have a native volume.

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docker-compose.yml

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version: '3.7'\n\nvolumes:\n  db:\n\nservices:\n  db:\n    image: mongo:3-xenial\n    restart: always\n    volumes:\n      - db:/data/db\n    ports:\n      - 27017:27017

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Then start with docker-compose up -d.

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Backup

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First we will do a backup of our running instance.

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docker-compose exec -T db mongodump --archive --gzip --db mydb > dump.gz

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The -T option is for enabling piping the output to our own machine. We also tell mongo to use the --gzip option to compress the file significantly.
Lastly we specify the --db <database> that we want to backup.

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Restore

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Whenever we want to restore a db, or maybe seed it we can run the following:

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docker-compose exec -T db mongorestore --archive --gzip < dump.gz

\n","status":"publish","date":"2019-08-15T14:04:16","modified":"2020-09-22T20:50:40","tags":{"nodes":[{"id":"dGVybToxMA==","slug":"cli","name":"cli","count":1},{"id":"dGVybToxNw==","slug":"docker","name":"docker","count":3}]},"post":{"featured":{"srcSet":"https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-300x146.jpg 300w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-1024x497.jpg 1024w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-150x73.jpg 150w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-768x373.jpg 768w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-1536x745.jpg 1536w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-2048x994.jpg 2048w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-500x243.jpg 500w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-800x388.jpg 800w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-1200x582.jpg 1200w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-1500x728.jpg 1500w, https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-2000x970.jpg 2000w","altText":"","sourceUrl":"https://api.nicco.io/wp-content/uploads/2019/08/tobias-fischer-PkbZahEG2Ng-unsplash-scaled.jpg"}}}]