feat: add timescaledb-oss container image

CODEOWNERS

@@ -3,3 +3,6 @@
 # https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/about-code-owners
 
 * @cloudnative-pg/maintainers @NiccoloFei
+
+# TimescaleDB (OSS version)
+/timescaledb-oss/ @shusaan @cloudnative-pg/maintainers @NiccoloFei

README.md

@@ -38,6 +38,7 @@ they are maintained by their respective authors, and PostgreSQL Debian Group
 | **[pg_crash](pg-crash)** | **Disruptive** fault injection and chaos engineering extension | [github.com/cybertec-postgresql/pg_crash](https://github.com/cybertec-postgresql/pg_crash) | CNPG maintainers |
 | **[pgvector](pgvector)** | Vector similarity search for PostgreSQL | [github.com/pgvector/pgvector](https://github.com/pgvector/pgvector) | CNPG maintainers |
 | **[PostGIS](postgis)** | Geospatial database extension for PostgreSQL | [postgis.net/](https://postgis.net/) | CNPG maintainers |
+| **[TimescaleDB Apache-2 Edition](timescaledb-oss)** | Time-series database for PostgreSQL (open source version) | [github.com/timescale/timescaledb/](https://github.com/timescale/timescaledb/) | @shusaan |
 
 Extensions are provided only for the OS versions already built by the
 [`cloudnative-pg/postgres-containers`](https://github.com/cloudnative-pg/postgres-containers) project,

timescaledb-oss/Dockerfile

@@ -0,0 +1,27 @@
+# SPDX-FileCopyrightText: Copyright © contributors to CloudNativePG, established as CloudNativePG a Series of LF Projects, LLC.
+# SPDX-License-Identifier: Apache-2.0
+
+ARG BASE=ghcr.io/cloudnative-pg/postgresql:18-minimal-trixie
+FROM $BASE AS builder
+
+ARG PG_MAJOR
+ARG EXT_VERSION
+
+USER 0
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends "postgresql-${PG_MAJOR}-timescaledb=${EXT_VERSION}"
+
+FROM scratch
+ARG PG_MAJOR
+
+# Licenses
+COPY --from=builder /usr/share/doc/postgresql-${PG_MAJOR}-timescaledb/copyright /licenses/postgresql-${PG_MAJOR}-timescaledb/
+
+# Libraries
+COPY --from=builder /usr/lib/postgresql/${PG_MAJOR}/lib/timescaledb* /lib/
+
+# Share
+COPY --from=builder /usr/share/postgresql/${PG_MAJOR}/extension/timescaledb* /share/extension/
+
+USER 65532:65532

timescaledb-oss/README.md

@@ -0,0 +1,125 @@
+# `TimescaleDB` (Apache 2.0 Edition)
+<!--
+SPDX-FileCopyrightText: Copyright © contributors to CloudNativePG, established as CloudNativePG a Series of LF Projects, LLC.
+SPDX-License-Identifier: Apache-2.0
+-->
+
+[TimescaleDB](https://github.com/timescale/timescaledb) is an open-source
+time-series database built on PostgreSQL. It enables fast analytics, efficient
+storage, and powerful querying for time-series workloads.
+
+> [!NOTE]
+> This image contains only the Apache 2.0 licensed components of TimescaleDB
+> (known as "TimescaleDB Apache-2 Edition") to ensure CNCF licensing
+> compliance. Advanced features requiring the Timescale License (TSL) are not
+> included.
+
+This image provides a convenient way to deploy and manage the open-source core
+of TimescaleDB with [CloudNativePG](https://cloudnative-pg.io/).
+
+## Usage
+
+### 1. Add the TimescaleDB extension image to your Cluster
+
+Define the `timescaledb` extension under the `postgresql.extensions` section of
+your `Cluster` resource. For example:
+
+```yaml
+apiVersion: postgresql.cnpg.io/v1
+kind: Cluster
+metadata:
+  name: cluster-timescaledb
+spec:
+  imageName: ghcr.io/cloudnative-pg/postgresql:18-minimal-trixie
+  instances: 1
+
+  storage:
+    size: 1Gi
+
+  postgresql:
+    shared_preload_libraries:
+      - "timescaledb"
+    parameters:
+      timescaledb.telemetry_level: 'off'
+      max_locks_per_transaction: '128'
+
+    extensions:
+    - name: timescaledb
+      image:
+        # renovate: suite=trixie-pgdg depName=postgresql-18-timescaledb
+        reference: ghcr.io/cloudnative-pg/timescaledb-oss:2.26.4-18-trixie
+```
+
+### 2. Enable the extension in a database
+
+You can install `timescaledb` in a specific database by creating or updating a
+`Database` resource. For example, to enable it in the `app` database:
+
+```yaml
+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: cluster-timescaledb-app
+spec:
+  name: app
+  owner: app
+  cluster:
+    name: cluster-timescaledb
+  extensions:
+  - name: timescaledb
+    # renovate: suite=trixie-pgdg depName=postgresql-18-timescaledb extractVersion=^(?<version>\d+\.\d+\.\d+)
+    version: '2.26.4'
+```
+
+### 3. Verify installation
+
+Once the database is ready, connect to it with `psql` and run:
+
+```sql
+\dx
+```
+
+You should see `timescaledb` listed among the installed extensions.
+
+### 4. Create a hypertable
+
+To use TimescaleDB's time-series features, create a hypertable:
+
+```sql
+-- Create a regular table
+CREATE TABLE sensor_data (
+  time TIMESTAMPTZ NOT NULL,
+  sensor_id INTEGER,
+  temperature DOUBLE PRECISION,
+  humidity DOUBLE PRECISION
+);
+
+-- Convert it to a hypertable
+SELECT create_hypertable('sensor_data', 'time');
+
+-- Insert some data
+INSERT INTO sensor_data VALUES (NOW(), 1, 21.5, 45.0);
+```
+
+## Maintainers
+
+This container image is maintained by @shuusan.
+
+## License
+
+This image contains only the Apache 2.0 licensed components of TimescaleDB.
+Features requiring the Timescale License (TSL) are not included to ensure
+compliance with CNCF licensing requirements.
+
+All relevant license and copyright information for the `timescaledb-oss` extension
+and its dependencies are bundled within the image at:
+
+```text
+/licenses/
+```
+
+By using this image, you agree to comply with the terms of the licenses
+contained therein.
+
+For further information, refer to
+[Software Licensing: Timescale License (TSL)](https://www.tigerdata.com/legal/licenses).

timescaledb-oss/metadata.hcl

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+# SPDX-FileCopyrightText: Copyright © contributors to CloudNativePG, established as CloudNativePG a Series of LF Projects, LLC.
+# SPDX-License-Identifier: Apache-2.0
+metadata = {
+  name                     = "timescaledb-oss"
+  sql_name                 = "timescaledb"
+  image_name               = "timescaledb-oss"
+  licenses                 = ["Apache-2.0"]
+  shared_preload_libraries = ["timescaledb"]
+  postgresql_parameters    = {}
+  extension_control_path   = []
+  dynamic_library_path     = []
+  ld_library_path          = []
+  bin_path                 = []
+  env                      = {}
+  auto_update_os_libs      = false
+  required_extensions      = []
+  create_extension         = true
+
+  versions = {
+    trixie = {
+      "18" = {
+        // renovate: suite=trixie-pgdg depName=postgresql-18-timescaledb
+        package = "2.26.4+dfsg-1.pgdg13+1"
+        // renovate: suite=trixie-pgdg depName=postgresql-18-timescaledb extractVersion=^(?<version>\d+\.\d+\.\d+)
+        sql = "2.26.4"
+      }
+    }
+    bookworm = {
+      "18" = {
+        // renovate: suite=bookworm-pgdg depName=postgresql-18-timescaledb
+        package = "2.26.4+dfsg-1.pgdg12+1"
+        // renovate: suite=bookworm-pgdg depName=postgresql-18-timescaledb extractVersion=^(?<version>\d+\.\d+\.\d+)
+        sql = "2.26.4"
+      }
+    }
+  }
+}

timescaledb-oss/test/chainsaw-test.yaml

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+apiVersion: chainsaw.kyverno.io/v1alpha1
+kind: Test
+metadata:
+  name: verify-timescaledb-extension
+spec:
+  timeouts:
+    apply: 5s
+    assert: 3m
+    delete: 30s
+  description: Verify TimescaleDB extension is properly installed
+  steps:
+  - name: Create a Cluster with the extension
+    try:
+    - apply:
+        file: cluster.yaml
+    - apply:
+        file: database.yaml
+    - assert:
+        file: cluster-assert.yaml
+    - assert:
+        file: database-assert.yaml
+
+  - name: Verify extension is installed
+    try:
+    - apply:
+        file: check-extension.yaml
+    - assert:
+        file: check-extension-assert.yaml

timescaledb-oss/test/check-extension-assert.yaml

@@ -0,0 +1,6 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: extension-installed
+status:
+  succeeded: 1

timescaledb-oss/test/check-extension.yaml

@@ -0,0 +1,30 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: extension-installed
+spec:
+  template:
+    spec:
+      restartPolicy: OnFailure
+      containers:
+      - name: data-test
+        env:
+          - name: EXT_VERSION
+            value: ($values.version)
+          - name: DB_URI
+            valueFrom:
+              secretKeyRef:
+                name: (join('-', [$values.name, 'app']))
+                key: uri
+        image: alpine/psql:latest
+        command: ['sh', '-c']
+        args:
+         - |
+           set -e
+           DB_URI=$(echo $DB_URI | sed "s|/\*|/|")
+           test "$(psql "$DB_URI" -tAc "SELECT EXISTS (SELECT FROM pg_catalog.pg_extension WHERE extname = 'timescaledb' AND extversion = '${EXT_VERSION}')" -q)" = "t"
+           psql "$DB_URI" -c "DROP TABLE IF EXISTS test_hypertable CASCADE;"
+           psql "$DB_URI" -c "CREATE TABLE test_hypertable (time TIMESTAMPTZ NOT NULL, value DOUBLE PRECISION);"
+           psql "$DB_URI" -c "SELECT create_hypertable('test_hypertable', by_range('time'));"
+           psql "$DB_URI" -c "INSERT INTO test_hypertable VALUES (NOW(), 1.0);"
+           test "$(psql "$DB_URI" -tAc "SELECT COUNT(*) FROM test_hypertable" -q)" = "1"

timescaledb-oss/test/cluster-assert.yaml

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+apiVersion: postgresql.cnpg.io/v1
+kind: Cluster
+metadata:
+  name: ($values.name)
+status:
+  readyInstances: 1
+  phase: Cluster in healthy state
+  image: ($values.pg_image)

timescaledb-oss/test/cluster.yaml

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+apiVersion: postgresql.cnpg.io/v1
+kind: Cluster
+metadata:
+  name: ($values.name)
+spec:
+  imageName: ($values.pg_image)
+  instances: 1
+
+  storage:
+    size: 1Gi
+
+  postgresql:
+    parameters:
+      timescaledb.telemetry_level: 'off'
+    shared_preload_libraries: ($values.shared_preload_libraries)
+    extensions: ($values.extensions)

timescaledb-oss/test/database-assert.yaml

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+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: (join('-', [$values.name, 'app']))
+status: ($values.database_assert_status)

timescaledb-oss/test/database.yaml

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+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: (join('-', [$values.name, 'app']))
+spec:
+  name: app
+  owner: app
+  cluster:
+    name: ($values.name)
+  extensions: ($values.database_config.extensions_spec)