Day 47

Author: msdousti

0047_how_to_install_postgres_16_with_plpython3u.md

@@ -0,0 +1,95 @@
+Originally from: [tweet](https://twitter.com/samokhvalov/status/1723535079451033697), [LinkedIn post]().
+
+---
+
+# How to install Postgres 16 with plpython3u: Recipes for macOS, Ubuntu, Debian, CentOS, Docker
+
+> I post a new PostgreSQL "howto" article every day. Join me in this
+> journey – [subscribe](https://twitter.com/samokhvalov/), provide feedback, share!
+
+PL/Python is a procedural language extension for PostgreSQL that allows you to write stored procedures and triggers in
+Python, a widely-used, high-level, and versatile programming language.
+
+`plpython3u` is the "untrusted" version of PL/Python. This variant allows Python functions to perform operations such as
+file I/O, network communication, and other actions that could potentially affect the server's behavior or security.
+
+We used `plpython3u` in
+[Day 23: How to use OpenAI APIs right from Postgres to implement semantic search and GPT chat](0023_how_to_use_openai_apis_in_postgres.md),
+let's now discuss how to install it.
+
+And something tells me that we'll be using it more in the future, for various tasks.
+
+This howto is for self-managed Postgres only.
+
+## macOS (Homebrew)
+
+```bash
+brew tap petere/postgresql
+brew install petere/postgresql/postgresql@16
+
+psql postgres \
+  -c 'create extension plpython3u'
+```
+
+## Ubuntu 22.04 LTS or Debian 12
+
+```bash
+sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" \
+  > /etc/apt/sources.list.d/pgdg.list'
+
+curl -fsSL https://postgresql.org/media/keys/ACCC4CF8.asc \
+  | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/postgresql.gpg
+
+sudo apt update
+sudo apt install -y \
+  postgresql-16 \
+  postgresql-contrib-16 \
+  postgresql-plpython3-16
+
+sudo -u postgres psql \
+  -c 'create extension plpython3u'
+```
+
+## CentOS Stream 9
+
+```bash
+dnf module reset -y postgresql 
+dnf module enable -y postgresql:16
+
+dnf install -y \
+  postgresql-server \
+  postgresql \
+  postgresql-contrib \
+  postgresql-plpython3
+
+postgresql-setup --initdb
+
+systemctl enable --now postgresql
+
+sudo -u postgres psql \
+  -c 'create extension plpython3u'
+```
+
+## Docker
+
+```bash
+echo "FROM postgres:16
+RUN apt update
+RUN apt install -y postgresql-plpython3-16" \
+> postgres_plpython3u.Dockerfile
+
+sudo docker build \
+  -t postgres-plpython3u:16 \
+  -f postgres_plpython3u.Dockerfile \
+  .
+
+sudo docker run \
+  --detach \
+  --name pg16 \
+  -e POSTGRES_PASSWORD=secret \
+  -v $(echo ~)/pgdata:/var/lib/postgresql/data \
+  postgres-plpython3u:16
+
+sudo docker exec -it pg16 \
+  psql -U postgres -c 'create extension plpython3u'
+```

README.md

@@ -73,6 +73,7 @@ As an example, first 2 rows:
 - 0044 [How to monitor transaction ID wraparound risks](./0044_how_to_monitor_transaction_id_wraparound_risks.md)
 - 0045 [How to monitor xmin horizon to prevent XID/MultiXID wraparound and high bloat](./0045_how_to_monitor_xmin_horizon.md)
 - 0046 [How to deal with bloat](./0046_how_to_deal_with_bloat.md)
+- 0047 [How to install Postgres 16 with plpython3u: Recipes for macOS, Ubuntu, Debian, CentOS, Docker](./0047_how_to_install_postgres_16_with_plpython3u.md)
 - ...
 
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