Docker PostgreSQL 9.6 – 安装扩展plpython3u（与分位数扩展冲突）

我想用plpython安装PostgreSQL dockerised服务。 我能够成功地构build图像，但是当我来运行容器时，出现以下错误：

错误：无法打开扩展控制文件“/usr/share/postgresql/9.5/extension/plpython3u.control”：没有这样的文件或目录语句：CREATE EXTENSION“plpython3u”; psql：/docker-entrypoint-initdb.d/create_db.sql：7：错误：无法打开扩展控制文件“/usr/share/postgresql/9.5/extension/plpython3u.control”：没有这样的文件或目录

我的目录布局：

me@yourbox:~/Projects/experimental/docker/scratchdb$ tree . ├── Dockerfile └── sql ├── create_db.sql └── schemas └── DDL └── db_schema_foo.sql 

Dockerfile

 FROM library/postgres:9.6 FROM zitsen/postgres-pgxn RUN apt-get update \ && apt-get install -y --no-install-recommends \ python3 postgresql-plpython3-9.6 RUN pgxn install quantile COPY sql /docker-entrypoint-initdb.d/ # Add VOLUMEs to allow backup of config, logs and databases VOLUME ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"] # Set the default command to run when starting the container # CMD ["/usr/lib/postgresql/9.6/bin/postgres", "-D", "/var/lib/postgresql/9.6/main", "-c", "config_file=/etc/postgresql/9.6/main/postgresql.conf"] 

create_db.sql

 # Uncomment line below for debugging purposes set client_min_messages TO debug1; CREATE EXTENSION "quantile" CREATE EXTENSION "plpython3u"; -- Create myappuser CREATE ROLE myappuser LOGIN ENCRYPTED PASSWORD 'passw0rd123' NOINHERIT; CREATE DATABASE only_foo_and_horses WITH ENCODING 'UTF8' TEMPLATE template1; -- \l+ GRANT ALL PRIVILEGES ON DATABASE only_foo_and_horses TO myappuser; -- Import only_foo_and_horses DDL and initialise database data \c only_foo_and_horses; \i /docker-entrypoint-initdb.d/schemas/DDL/db_schema_foo.sql; -- # enable python in database 

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这些是我用来构build和运行容器的命令：

 docker build -t scratch:pg . docker run -it -rm scratch:pg 

如何在dockerised PostgreSQL服务中安装plpython？

Answer 1

我认为你的错误是由于最初的错误的CMD指出了PostgreSQL的错误位置（9.5 vs 9.6）。

不过，我想我已经发现了错误，为什么SQL不被导入。

此映像的默认ENTRYPOINT （位于https://github.com/docker-library/postgres/blob/bef8f02d1fe2bb4547280ba609f19abd20230180/9.6/docker-entrypoint.sh ）负责从/docker-entrypoint-initdb.d/导入。 既然你是覆盖CMD ，它不等于只是postgresql ，它正在跳过这一部分。

默认的ENTRYPOINT应该做你想要的。 尝试删除您的CMD 。

Answer 2

我刚刚从头开始运行，似乎扩展已成功创build。 还有问题吗？

 /usr/local/bin/docker-entrypoint.sh: running /docker-entrypoint-initdb.d/create_db.sql SET CREATE EXTENSION CREATE ROLE CREATE DATABASE GRANT LOG: received fast shutdown request waiting for server to shut down...LOG: aborting any active transactions LOG: autovacuum launcher shutting down LOG: shutting down .LOG: database system is shut down done server stopped PostgreSQL init process complete; ready for start up.