如何将本地postgresql数据库迁移到azk？

Question

此处有将现有MySQL数据库迁移到azk图像的说明：http://images.azk.io/#/mysql?_k=yvigvq

我如何为postgresql做同样的事情？

谢谢！

Answer 1

There are basically three ways to restore a dump file to a database running inside azk (they also work with other DBs such as MySQL and MariaDB):

1- Using a local client (graphical tool or command line tool):

Before connecting to the database, you need to find out the database running port:

$ azk start postgres  # Ensures the database is running
$ azk status postgres
┌───┬──────────┬───────────┬──────────────┬─────────────────┬─────────────┐
│   │ System   │ Instances │ Hostname/url │ Instances-Ports │ Provisioned │
├───┼──────────┼───────────┼──────────────┼─────────────────┼─────────────┤
│ ↑ │ postgres │ 1         │ dev.azk.io   │ 1-data:32831    │ -           │
└───┴──────────┴───────────┴──────────────┴─────────────────┴─────────────┘

Now, we can connect to the database using the host dev.azk.io and the resulting port from the previous command (32381). The username, password and database name are defined in the Azkfile.

2- Using azk shell and the database CLI:

Running the same steps described above to find out the database running port, you can run the following command:

$ azk shell postgres
$ psql --host dev.azk.io --port 32831 --username ${POSTGRES_USER} \
--password=${POSTGRES_PASS} --dbname=${POSTGRES_DB} < dbexport.sql

3 - Using autoload script from the database image:

Most of the official Docker Images for databases has an entrypoint script, which looks for files in the folder /docker-entrypoint-initdb.d/ and run them when the database is initialized. Given that, you can simply mount your dump files (.sql) in that location, like described in the following Azkfile:

systems({
 postgres: {
   image: { docker: "azukiapp/postgres" },
   mounts: {
     "/docker-entrypoint-initdb.d": sync("./dumps"),
   }
 }
});

Starting the postgres system with the command azk start postgres, the dump files will be run automatically.

Obs: As you can see in the Postgres' script and in the Mysql's, the dump files can be plain text (.sql), compressed (.sql.gz) or even shell scripts (.sh).

Answer 2

我只是在PR中添加了图像存储库中的说明：

https://github.com/azukiapp/docker-postgres/pull/3

参见：Migrating an existing PostgreSQL Server

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