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--- porting_an_lxc_to_docker [2024/08/11 04:31] – oso
+++ porting_an_lxc_to_docker [2024/10/17 21:42] (current) – external edit 127.0.0.1
@@ Line 47: / Line 47: @@
 ===== General Outline for Container Creation =====
-Here’s a general outline of the steps to create Docker containers for a Python application and a MariaDB database.
+Here’s a general outline of the steps to create Docker containers for a Python application writing to a MariaDB database.
 ==== 1. Setting Up Dependencies ====
@@ Line 85: / Line 85: @@
 **Explanation**:
   * `FROM python:3.9-slim`: This uses a lightweight Python 3.9 image as the base.
+  * **Explanation of MariaDB Connector/C and Dependencies**
+<code dockerfile>
+# Install MariaDB Connector/C library and other dependencies
+RUN apt-get update && apt-get install -y \
+    libmariadb3 \
+    libmariadb-dev \
+    gcc \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+</code>
+  * **`RUN apt-get update && apt-get install -y \`**:
+    - This command updates the package list on the Debian-based slim image and installs the specified packages.
+  * **`libmariadb3`**:
+    - **What it is**: This is the shared library for MariaDB Connector/C, which is a lightweight client library to connect your Flask application to a MariaDB database.
+    - **Why it’s needed**: If your Flask app interacts with a MariaDB database, this library allows it to establish that connection.
+  * **`libmariadb-dev`**:
+    - **What it is**: This is the development package for MariaDB Connector/C. It includes the headers and static libraries needed for compiling programs that use MariaDB.
+    - **Why it’s needed**: If you have Python packages in `requirements.txt` that need to compile C extensions (for example, `mysqlclient`), they require these development files to build correctly.
+  * **`gcc`**:
+    - **What it is**: The GNU Compiler Collection, a compiler system that supports various programming languages.
+    - **Why it’s needed**: This is required to compile any C extensions or Python packages that need compilation, particularly those that depend on the MariaDB libraries mentioned above.
+  * **`&& apt-get clean && rm -rf /var/lib/apt/lists/*`**:
+    - **What it does**: This cleans up the package lists and removes any cached data from `apt-get`, which reduces the size of the Docker image by removing unnecessary files.
   * `WORKDIR /app`: Sets the working directory inside the container.
   * `COPY requirements.txt requirements.txt`: Copies the `requirements.txt` file into the container.
@@ Line 280: / Line 303: @@
 </code>
-### Explanation
+=== Explanation ===
   * **Update and install dependencies**: The `RUN apt-get update && apt-get install -y` command installs the required MariaDB Connector/C library (`libmariadb3` and `libmariadb-dev`) and a C compiler (`gcc`).
   * **Clean up**: The `apt-get clean && rm -rf /var/lib/apt/lists/*` commands clean up the apt cache to reduce the image size.
@@ Line 348: / Line 372: @@
   * LXC documentation: https://linuxcontainers.org/lxc/introduction/
+https://docs.facundoitest.space/doku.php?id=crear_container_con_apps_en_python_para_aci