I'm trying to create a PostgreSQL container that already contains development data. I can see the data I have created, but when I commit, push, and pull the image, the data is not there.
Below is my Dockerfile:
FROM postgis/postgis:11-2.5
MAINTAINER Me
# Contents of 20-init_db.sql:
# CREATE EXTENSION IF NOT EXISTS btree_gist;
# CREATE EXTENSION IF NOT EXISTS hstore;
COPY ./20-init_db.sql /docker-entrypoint-initdb.d/20-init_db.sql
COPY ./make_data.sh /make_data.sh
I create the container using the script below, and data is successfully populated.
#!/bin/bash
aws ecr get-login-password --region us-east-1 | \
docker login --username AWS --password-stdin 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com
aws ecr create-repository --repository-name dev_postgres --region us-east-1
# Make sure the build environment is clean
docker stop dev_postgres_container
docker rm dev_postgres_container
docker rmi dev_postgres_img
# Prepare the container
docker build -f postgres.Dockerfile -t dev_postgres_img .
docker run -d --name dev_postgres_container \
-e POSTGRES_DB=the_database \
-e POSTGRES_USER=the_user \
-e POSTGRES_PASSWORD=the_password \
-e PGDATA=/var/lib/postgresql/data/pgdata
dev_postgres_img
docker exec -it dev_postgres_container bash /make_data.sh
###
### This returns the correct number of users, so there is data in the container at this point.
###
docker exec -it dev_postgres_container /usr/bin/psql -U the_user the_database -c "select count(*) from auth_user;"
# Commit the container state and save it to Amazon ECR:
docker commit $(docker ps -q --filter "name=dev_postgres_container") 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:11-2.5-with-data
# Also tag it with "latest" and the timestamp
docker tag 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:11-2.5-with-data 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:latest-with-data
docker tag 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:11-2.5-with-data 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:$( date -u +%Y%m%d_%H%MZ )-with-data
# Push
docker push 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres --all-tags
However, when I pull the container in an isolated environment, there's no data:
brew install virtualbox
brew install multipass
sudo multipass set local.driver=virtualbox
multipass launch --name ubuntu2
multipass mount ~/.aws ubuntu2:/home/ubuntu/.aws
multipass mount ./db ubuntu2:/home/ubuntu/db
multipass exec ubuntu2 -- bash /home/ubuntu/db/test_db_container.sh
### Contents of test_db_container.sh are below: ###
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo apt-get install -y awscli
# Pull Docker container:
aws ecr get-login-password --region us-east-1 | \
sudo docker login --username AWS --password-stdin 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com
sudo docker pull 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:latest-with-data
sudo docker run -d --name the_db 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:latest-with-data
###
### The auth_user table does not exist.
###
sudo docker exec -it the_db /usr/bin/psql -U the_user the_database -c "select count(*) from auth_user;"
sudo docker history 23456789JQKA.dkr.ecr.us-east-1.amazonaws.com/dev_postgres:latest-with-data
## Result:
IMAGE CREATED CREATED BY SIZE COMMENT
854dbef239c2 23 hours ago postgres 70B
4b1bd66a8d33 23 hours ago COPY ./make_data.sh /make_data.sh 3.03kB buildkit.dockerfile.v0
<missing> 23 hours ago COPY ./20-init_db.sql /docker-entrypoint-ini… 188B buildkit.dockerfile.v0
<missing> 23 hours ago MAINTAINER Me 0B buildkit.dockerfile.v0
[...]
Side note: I've considered creating a data volume container, but this method seemed simpler and better documented.
Other side note: I can't add the data in the Dockerfile because Postgres needs to be running before data can be inserted.
Why isn't docker commit saving the state of my container? Why does the image not contain data?
