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Docker Data Container Snapshots - g.raphaelli.com

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http://g.raphaelli.com/posts/2015-11-13-docker-data-container-snapshots/

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g.raphaelli.com

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Docker Data Container Snapshots

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It’s straightforward to create a data container with pre-baked archives included: COPY them on during docker build and off you go. But what if you can’t or don’t want to create the data ahead of time? At RealScout, we recently started experimenting with the approach detailed below to create docker images from postgres snapshots for distribution to development environments. Briefly, it looks like: Create and initialize a data container Start postgres using the volume from that data container Restore data Stop postgres Create an image from the populated data container Setup First, build a data container image, for example with this Dockerfile. : FROM debian:jessie ENV PGDATA /var/lib/postgresql/data # ids must match postgres container RUN groupadd -r -g 999 postgres && useradd -u 999 -r -g postgres postgres RUN mkdir -p -m 0700 ${PGDATA} && chown -R postgres:postgres ${PGDATA} VOLUME ${PGDATA} CMD /bin/true

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Docker Data Container Snapshots

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It’s straightforward to create a data container with pre-baked archives included: COPY them on during docker build and off you go. But what if you can’t or don’t want to create the data ahead of time? At RealScout, we recently started experimenting with the approach detailed below to create docker images from postgres snapshots for distribution to development environments. Briefly, it looks like: Create and initialize a data container Start postgres using the volume from that data container Restore data Stop postgres Create an image from the populated data container Setup First, build a data container image, for example with this Dockerfile. : FROM debian:jessie ENV PGDATA /var/lib/postgresql/data # ids must match postgres container RUN groupadd -r -g 999 postgres && useradd -u 999 -r -g postgres postgres RUN mkdir -p -m 0700 ${PGDATA} && chown -R postgres:postgres ${PGDATA} VOLUME ${PGDATA} CMD /bin/true

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