AINode Deployment

1. AINode Introduction

1.1 Capability Introduction

AINode is the third type of endogenous node provided by IoTDB after the Configurable Node and DataNode. This node extends its ability to perform machine learning analysis on time series by interacting with the DataNode and Configurable Node of the IoTDB cluster. It supports the introduction of existing machine learning models from external sources for registration and the use of registered models to complete time series analysis tasks on specified time series data through simple SQL statements. The creation, management, and inference of models are integrated into the database engine. Currently, machine learning algorithms or self-developed models are available for common time series analysis scenarios, such as prediction and anomaly detection.

1.2 Delivery Method

It is an additional package outside the IoTDB cluster, with independent installation.

1.3 Deployment mode

2. Installation preparation

2.1 Get installation package

Unzip and install the package
(apache-iotdb-<version>-ainode-bin.zip)， The directory structure after unpacking the installation package is as follows:

Catalogue	Type	Explain
lib	folder	AINode compiled binary executable files and related code dependencies
sbin	folder	The running script of AINode can start, remove, and stop AINode
conf	folder	Contains configuration items for AINode, specifically including the following configuration items
LICENSE	file	Certificate
NOTICE	file	Tips
README_ZH.md	file	Explanation of the Chinese version of the markdown format
README.md	file	Instructions

2.2 Environmental Preparation

1. Recommended operating systems: Ubuntu, CentOS, MacOS
2. IoTDB version: >= V 2.0.5.1
3. Runtime environment
   • Python version between 3.9 and 3.12, with pip and venv tools installed;

3. Installation steps

3.1 Install AINode

1. Ensure Python version is between 3.9 and 3.12:

  python --version
# or
python3 --version

2. Download and import AINode into a dedicated folder, switch to the folder, and unzip the package:

  unzip timechodb-2.0.5.1-ainode-bin.zip

3. Create a virtual environment (execute in the ainode directory):

 python3 -m venv venv

4. Activate the virtual environment:

 source venv/bin/activate

5. Update pip and install AINode dependencies:

  python -m pip install --upgrade pip
  poetry lock
  poetry install

3.2 Configuration item modification

AINode supports modifying some necessary parameters. You can find the following parameters in the conf/iotdb-ainode.properties file and make persistent modifications to them:

Name	Description	Type	Default Value
cluster_name	Identifier of the cluster AINode joins	string	defaultCluster
ain_seed_config_node	Address of the ConfigNode registered when AINode starts	String	127.0.0.1:10710
ain_cluster_ingress_address	RPC address of the DataNode for AINode to pull data	String	127.0.0.1
ain_cluster_ingress_port	RPC port of the DataNode for AINode to pull data	Integer	6667
ain_cluster_ingress_username	Client username for AINode to pull data from the DataNode	String	root
ain_cluster_ingress_password	Client password for AINode to pull data from the DataNode	String	root
ain_cluster_ingress_time_zone	Client time zone for AINode to pull data from the DataNode	String	UTC+8
ain_inference_rpc_address	Address for AINode to provide services and communication (internal interface)	String	127.0.0.1
ain_inference_rpc_port	Port for AINode to provide services and communication	String	10810
ain_system_dir	Metadata storage path for AINode (relative path starts from OS-dependent directory; absolute path is recommended)	String	data/AINode/system
ain_models_dir	Path to store model files for AINode (relative path starts from OS-dependent directory; absolute path is recommended)	String	data/AINode/models
ain_thrift_compression_enabled	Whether to enable Thrift compression for AINode (0=disabled, 1=enabled)	Boolean	0

3.3 Start AINode

After completing the deployment of Seed Config Node, the registration and inference functions of the model can be supported by adding AINode nodes. After specifying the information of the IoTDB cluster in the configuration file, the corresponding instruction can be executed to start AINode and join the IoTDB cluster。

Networking environment startup

Start command

  # Start command
  # Linux and MacOS systems
  bash sbin/start-ainode.sh 

  # Windows systems
  sbin\start-ainode.bat  

  # Backend startup command (recommended for long-term running)
  # Linux and MacOS systems
  nohup bash sbin/start-ainode.sh  > myout.file 2>& 1 &

  # Windows systems
  nohup bash sbin\start-ainode.bat  > myout.file 2>& 1 &

Example

  # Start command
  # Linux and MacOS systems
  bash sbin/start-ainode.sh
  # Windows systems
  sbin\start-ainode.bat 


  # Backend startup command (recommended for long-term running)
  # Linux and MacOS systems
  nohup bash sbin/start-ainode.sh  > myout.file 2>& 1 &
  # Windows systems
  nohup bash sbin\start-ainode.bat  > myout.file 2>& 1 &

3.4 Detecting the status of AINode nodes

During the startup process of AINode, the new AINode will be automatically added to the IoTDB cluster. After starting AINode, you can enter SQL in the command line to query. If you see an AINode node in the cluster and its running status is Running (as shown below), it indicates successful joining.

IoTDB> show cluster
+------+----------+-------+---------------+------------+-------+-----------+
|NodeID|  NodeType| Status|InternalAddress|InternalPort|Version|  BuildInfo|
+------+----------+-------+---------------+------------+-------+-----------+
|     0|ConfigNode|Running|      127.0.0.1|       10710|UNKNOWN|190e303-dev|
|     1|  DataNode|Running|      127.0.0.1|       10730|UNKNOWN|190e303-dev|
|     2|    AINode|Running|      127.0.0.1|       10810|UNKNOWN|190e303-dev|
+------+----------+-------+---------------+------------+-------+-----------+

3.5 Stop AINode

If you need to stop a running AINode node, execute the corresponding shutdown script.

Stop command

  # Linux / MacOS 
  bash sbin/stop-ainode.sh  

  #Windows
  sbin\stop-ainode.bat

Example

  # Linux / MacOS 
  bash sbin/stop-ainode.sh

  # Windows
  sbin\stop-ainode.bat

After stopping AINode, you can still see AINode nodes in the cluster, whose running status is UNKNOWN (as shown below), and the AINode function cannot be used at this time.

IoTDB> show cluster
+------+----------+-------+---------------+------------+-------+-----------+
|NodeID|  NodeType| Status|InternalAddress|InternalPort|Version|  BuildInfo|
+------+----------+-------+---------------+------------+-------+-----------+
|     0|ConfigNode|Running|      127.0.0.1|       10710|UNKNOWN|190e303-dev|
|     1|  DataNode|Running|      127.0.0.1|       10730|UNKNOWN|190e303-dev|
|     2|    AINode|UNKNOWN|      127.0.0.1|       10790|UNKNOWN|190e303-dev|
+------+----------+-------+---------------+------------+-------+-----------+

If you need to restart the node, you need to execute the startup script again.

4. common problem

4.1 An error occurs when starting AINode stating that the venv module cannot be found

When starting AINode using the default method, a Python virtual environment will be created in the installation package directory and dependencies will be installed, so it is required to install the venv module. Generally speaking, Python 3.10 and above versions come with built-in VenV, but for some systems with built-in Python environments, this requirement may not be met. There are two solutions when this error occurs (choose one or the other):

To install the Venv module locally, taking Ubuntu as an example, you can run the following command to install the built-in Venv module in Python. Or install a Python version with built-in Venv from the Python official website.

apt-get install python3.10-venv

Install version 3.10.0 of venv into AINode in the AINode path.

../Python-3.10.0/python -m venv venv(Folder Name）

When running the startup script, use -i to specify an existing Python interpreter path as the running environment for AINode, eliminating the need to create a new virtual environment.

4.2 The SSL module in Python is not properly installed and configured to handle HTTPS resources

WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
You can install OpenSSLS and then rebuild Python to solve this problem

Currently Python versions 3.6 to 3.9 are compatible with OpenSSL 1.0.2, 1.1.0, and 1.1.1.

Python requires OpenSSL to be installed on our system, the specific installation method can be found in link

sudo apt-get install build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev uuid-dev lzma-dev liblzma-dev
sudo -E ./configure --with-ssl
make
sudo make install

4.3 Pip version is lower

A compilation issue similar to "error: Microsoft Visual C++14.0 or greater is required..." appears on Windows

The corresponding error occurs during installation and compilation, usually due to insufficient C++version or Setup tools version. You can check it in

./python -m pip install --upgrade pip
./python -m pip install --upgrade setuptools

4.4 Install and compile Python

Use the following instructions to download the installation package from the official website and extract it:

.wget https://www.python.org/ftp/python/3.10.0/Python-3.10.0.tar.xz
tar Jxf Python-3.10.0.tar.xz

Compile and install the corresponding Python package:

cd Python-3.10.0
./configure prefix=/usr/local/python3
make
sudo make install
python3 --version