AINode Deployment

AINode Introduction

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.

Delivery Method

It is an additional package outside the IoTDB cluster, with independent installation and activation (if you need to try or use it, please contact Tianmu Technology Business or Technical Support).

Deployment mode

Installation preparation

Get installation package

Users can download the software installation package for AINode, download and unzip it to complete the installation of AINode.

Unzip and install the package (iotdb-enterprise-ainode-<version>.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 |

Environmental preparation

Suggested operating environment：Ubuntu, CentOS, MacOS
Runtime Environment
- Python>=3.8 is sufficient in a networked environment, and comes with pip and venv tools; Python 3.8 version is required for non networked environments,And from here Download the zip file corresponding to the operating system (Note that when downloading dependencies, you need to select the zip file in the libs folder, as shown in the following figure)，Copy all files in the folder to the lib folder in the iotdb enterprise android -<version> folder, and follow the steps below to start AINode.
- There must be a Python interpreter in the environment variables that can be directly called through the python instruction.
- It is recommended to create a Python interpreter venv virtual environment in the iotdb enterprise android -<version> folder. If installing version 3.8.0 virtual environment, the statement is as follows:
```
  # Install version 3.8.0 of Venv 
  ../Python-3.8.0/python -m venv venv(Folder Name）
```

Installation steps

AINode activation

Require IoTDB to be in normal operation and have AINode module authorization in the license (usually not in the license, please contact Tianmou Business or technical support personnel to obtain AINode module authorization).

The authorization method for activating the AINode module is as follows：

Method 1: Activate file copy activation
- After restarting the confignode node, enter the activation folder, copy the system_info file to the Tianmou staff, and inform them to apply for independent authorization for AINode;
- Received the license file returned by the staff;
- Put the license file into the activation folder of the corresponding node;

Method 2: Activate Script Activation

Obtain the required machine code for activation, enter the sbin directory of the installation directory, and execute the activation script：
```
  cd sbin 
  ./start-activate.sh
```

The following information is displayed. Please copy the machine code (i.e. this string of characters) to the Tianmou staff and inform them to apply for independent authorization of AINode：

Please copy the system_info's content and send it to Timecho:
Y17hFA0xRCE1TmkVxILuCIEPc7uJcr5bzlXWiptw8uZTmTX5aThfypQdLUIhMljw075hNRSicyvyJR9JM7QaNm1gcFZPHVRWVXIiY5IlZkXdxCVc1erXMsbCqUYsR2R2Mw4PSpFJsUF5jHWSoFIIjQ2bmJFW5P52KCccFMVeHTc=
Please enter license:

Enter the activation code returned by the staff into the Please enter license: command prompt in the previous step, as shown below：

Please enter license:
Jw+MmF+AtexsfgNGOFgTm83BgXbq0zT1+fOfPvQsLlj6ZsooHFU6HycUSEGC78eT1g67KPvkcLCUIsz2QpbyVmPLr9x1+kVjBubZPYlVpsGYLqLFc8kgpb5vIrPLd3hGLbJ5Ks8fV1WOVrDDVQq89YF2atQa2EaB9EAeTWd0bRMZ+s9ffjc/1Zmh9NSP/T3VCfJcJQyi7YpXWy5nMtcW0gSV+S6fS5r7a96PjbtE0zXNjnEhqgRzdU+mfO8gVuUNaIy9l375cp1GLpeCh6m6pF+APW1CiXLTSijK9Qh3nsL5bAOXNeob5l+HO5fEMgzrW8OJPh26Vl6ljKUpCvpTiw==
License has been stored to sbin/../activation/license
Import completed. Please start cluster and excute 'show cluster' to verify activation status

After updating the license, restart the DataNode node and enter the sbin directory of IoTDB to start the datanode：
```
  cd sbin
  ./start-datanode.sh   -d   #The parameter'd 'will be started in the background 
```

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	Describe	Type	Default value	Effective method after modification
cluster_name	The identifier for AINode to join the cluster	string	defaultCluster	Only allow modifications before the first service startup
ain_seed_config_node	The Configurable Node address registered during AINode startup	String	10710	Only allow modifications before the first service startup
ain_inference_rpc_address	AINode provides service and communication addresses	String	127.0.0.1	Effective after restart
ain_inference_rpc_port	AINode provides ports for services and communication	String	10810	Effective after restart
ain_system_dir	AINode metadata storage path, the starting directory of the relative path is related to the operating system, and it is recommended to use an absolute path	String	data/AINode/system	Effective after restart
ain_models_dir	AINode stores the path of the model file, and the starting directory of the relative path is related to the operating system. It is recommended to use an absolute path	String	data/AINode/models	Effective after restart
ain_logs_dir	The path where AINode stores logs, the starting directory of the relative path is related to the operating system, and it is recommended to use an absolute path	String	logs/AINode	Effective after restart
ain_thrift_compression_enabled	Does AINode enable Thrift's compression mechanism , 0-Do not start, 1-Start	Boolean	0	Effective after restart

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 item, the corresponding instruction can be executed to start AINode and join the IoTDB cluster。

Networking environment startup

Start command

  # Linux / MacOS 
  bash sbin/start-ainode.sh  -i <directory>  -r  -n

  # Windows
  sbin\start-ainode.bat  -i <directory>  -r  -n

Parameter introduction:

Name	Label	Describe	Is it mandatory	Type	Default value	Input method
ain_interpreter_dir	-i	The interpreter path of the virtual environment where AINode is installed requires the use of an absolute path.	no	String	Default reading of environment variables	Input or persist modifications during invocation
ain_force_reinstall	-r	Does this script check the version when checking the installation status of AINode. If it does, it will force the installation of the whl package in lib if the version is incorrect.	no	Bool	false	Input when calling
ain_no_dependencies	-n	Specify whether to install dependencies when installing AINode, and if so, only install the AINode main program without installing dependencies.	no	Bool	false	Input when calling

If you don't want to specify the corresponding parameters every time you start, you can also persistently modify the parameters in the ainode-env.sh and ainode-env.bat scripts in the conf folder (currently supporting persistent modification of the ain_interpreter-dir parameter).

ainode-env.sh :

 # The defaulte venv environment is used if ain_interpreter_dir is not set. Please use absolute path without quotation mark
 # ain_interpreter_dir=

ainode-env.bat :

  @REM The defaulte venv environment is used if ain_interpreter_dir is not set. Please use absolute path without quotation mark
  @REM set ain_interpreter_dir=

After writing the parameter value, uncomment the corresponding line and save it to take effect on the next script execution.

Example

Directly start:

  # 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 &

Update Start:

If the version of AINode has been updated (such as updating the lib folder), this command can be used. Firstly, it is necessary to ensure that AINode has stopped running, and then restart it using the -r parameter, which will reinstall AINode based on the files under lib.

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


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

Non networked environment startup

Start command

  # Linux / MacOS 
  bash sbin/start-ainode.sh  -i <directory>  -r  -n

  # Windows
  sbin\start-ainode.bat  -i <directory>  -r  -n

Parameter introduction:

Name	Label	Describe	Is it mandatory	Type	Default value	Input method
ain_interpreter_dir	-i	The interpreter path of the virtual environment where AINode is installed requires the use of an absolute path	no	String	Default reading of environment variables	Input or persist modifications during invocation
ain_force_reinstall	-r	Does this script check the version when checking the installation status of AINode. If it does, it will force the installation of the whl package in lib if the version is incorrect	no	Bool	false	Input when calling

Attention: When installation fails in a non networked environment, first check if the installation package corresponding to the platform is selected, and then confirm that the Python version is 3.8 (due to the limitations of the downloaded installation package on Python versions, 3.7, 3.9, and others are not allowed)

Example

Directly start:

  # 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 &

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|
+------+----------+-------+---------------+------------+-------+-----------+

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  -t<AINode-id>/<ip>:<rpc-port>

  #Windows
  sbin\stop-ainode.bat  -t<AINode-id>/<ip>:<rpc-port>

Parameter introduction:

Name	Label	Describe	Is it mandatory	Type	Default value	Input method
ain_remove_target	-t	When closing AINode, you can specify the Node ID, address, and port number of the target AINode to be removed, in the format of `<AINode id>/<ip>:<rpc port>`	no	String	nothing	Input when calling

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.

Remove AINode

When it is necessary to remove an AINode node from the cluster, a removal script can be executed. The difference between removing and stopping scripts is that stopping retains the AINode node in the cluster but stops the AINode service, while removing removes the AINode node from the cluster.

Remove command

  # Linux / MacOS 
  bash sbin/stop-ainode.sh  -i<directory>  -t<AINode-id>/<ip>:<rpc-port>  -r  -n

  # Windows
  sbin\stop-ainode.bat  -i<directory>  -t<AINode-id>/<ip>:<rpc-port>  -r  -n

Parameter introduction:

Name	Label	Describe	Is it mandatory	Type	Default value	Input method
ain_interpreter_dir	-i	The interpreter path of the virtual environment where AINode is installed requires the use of an absolute path	no	String	Default reading of environment variables	Input+persistent modification during invocation
ain_remove_target	-t	When closing AINode, you can specify the Node ID, address, and port number of the target AINode to be removed, in the format of `<AINode id>/<ip>:<rpc port>`	no	String	nothing	Input when calling
ain_force_reinstall	-r	Does this script check the version when checking the installation status of AINode. If it does, it will force the installation of the whl package in lib if the version is incorrect	no	Bool	false	Input when calling
ain_no_dependencies	-n	Specify whether to install dependencies when installing AINode, and if so, only install the AINode main program without installing dependencies	no	Bool	false	Input when calling

ainode-env.sh :

 # The defaulte venv environment is used if ain_interpreter_dir is not set. Please use absolute path without quotation mark
 # ain_interpreter_dir=

ainode-env.bat :

  @REM The defaulte venv environment is used if ain_interpreter_dir is not set. Please use absolute path without quotation mark
  @REM set ain_interpreter_dir=

After writing the parameter value, uncomment the corresponding line and save it to take effect on the next script execution.

Example

Directly remove:

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

# Windows
sbin\remove-ainode.bat

After removing the node, relevant information about the node cannot be queried.

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|
+------+----------+-------+---------------+------------+-------+-----------+

Specify removal:

If the user loses files in the data folder, AINode may not be able to actively remove them locally. The user needs to specify the node number, address, and port number for removal. In this case, we support users to input parameters according to the following methods for deletion.

# Linux / MacOS 
bash sbin/remove-ainode.sh -t <AINode-id>/<ip>:<rpc-port>

# Windows
sbin\remove-ainode.bat -t <AINode-id>/<ip>:<rpc-port>

common problem

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 3.8 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 python3.8-venv

Install version 3.8.0 of venv into AINode in the AINode path.

../Python-3.8.0/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.

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

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

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/3.8.0/Python-3.8.0.tar.xz
tar Jxf Python-3.8.0.tar.xz

Compile and install the corresponding Python package:

cd Python-3.8.0
./configure prefix=/usr/local/python3
make
sudo make install
python3 --version