LogFlow provides a tool to automate the logs analysis task. This analysis provides the correlations between the logs to help users to understand this amount of data. LogFlow is split into 3 modules: the log parsing tool, the relations discover model and the tree building tool.
The log parsing too aims at finding the pattern corresponding to a line of log to be able to extract value from this line. More precisely, each line is associated with a pattern. A pattern is a set of fixed words corresponding to the fixed parts of the line (the variable parts are removed).
Using the line "Connexion of user Marc", we can see that "Marc" is the variable part and "Connexion of user" is the fixed part. Then, the associated pattern is "Connexion of user *".
Once these patterns are associated, the relations between them can be learned. A relation can be the relation between network timeout and a failure for example. Our model is based on a LSTM augmented with an Attention layer to be able to learn and to analyse the correlations.
The correlation tree can be learned based on the previous learned correlation. The tree shows the user the correlation in a compact view to help him to detect relevant information from its logs.
To be able to use LogFlow, several concepts need to be explained.
LogFlow is designed to handle large and very large datasets (from 10 million of lines to several billions of lines), then ideas and concepts used to its implementation follow this need of performance for large data.
The log parsing tool can be used with a dataset of any size but the relation discover model should be use only with a large dataset (more than 10 millions of lines) because it relies on deep learning model.
The log parsing tool relies on one major concept to work: the pattern detection is done only between lines with same sizes.
The size of a line is defined as a number of words. The line is split according to the three letters: " " (whitespace), ":" and "=". Once the list is split, the pattern detection is done using the best common subsequence with the other lines.
In other word, the pattern is defined as the maximum number of common words between lines.
To enable multithreading, patterns corresponding to each size of line are computed into one thread. Then, it's impossible to have the same pattern for two lines with different number of words.
To be able to deal with unbalanced number of events, the relations discover uses a simple method: each cardinality of an event is associated with one model (one model = LSTM + Attention layer). A cardinality is defined as the ten power number of lines associated to the pattern. Then, a cardinality of 4 means that the pattern is associated with 10000 lines.
Then, one model learns the correlations of the patterns with the same cardinality. Basically, for a large dataset, cardinality varies between 0 and 8.
Note that due to the use of deep learning model, lower cardinality (i.e. lower than 4) should be ignored during the training step.
LogFlow can be installed using pip or docker. The recommended way is to use docker.
Note that we will need nvidia-docker if you want to use GPU acceleration for the LSTM learning task.
Using the Dockerfile at the root of this git.
docker build -t logflow .Then, start the docker using nvidia-docker
nvidia-docker run -it --pid=host -v $(pwd):/home/code logflow /bin/bashNow, you are inside your docker
cd /home/codeCreate a data and a model directory
mkdir data
mkdir modelNow, you are ready !
pip install -i https://test.pypi.org/simple/ --no-cache-dir --extra-index-url=https://pypi.org/simple/ LogFlow-Atos-Marc-PlatiniNote that it's a pre-alpha pip version. Prefer to use Docker installation instead of pip.
You can find data to test LogFlow on the LogHub repository: https://github.com/logpai/loghub The following example is based on the Windows dataset.
Note that LogFlow is optimized to handle several small files rather than one large file. Then, we can split the Windows dataset into several small files by using split on linux.
A main.py is provided as example.
First, import logflow
from logflow.logsparser.Dataset import Dataset
from logflow.logsparser.Parser import Parser
from logflow.logsparser.Embedding import Embedding
from logflow.logsparser.Journal import Journal
from logflow.relationsdiscover.Dataset import Dataset as Dataset_learning
from logflow.relationsdiscover.Worker import Worker
from logflow.logsparser import Pattern
from logflow.relationsdiscover import Model
from logflow.treebuilding.Dataset import Dataset as Dataset_building
from logflow.treebuilding.Workflow import WorkflowFirst, we need to define the function to get the message part of one line of log.
def parser_function(line):
return line.strip().split()[4:]Additionally, if we want to sort the logs according to a field, we can use a specific function
def split_function(line):
try:
return line.strip().split()[3]
except:
return "1"We can start with the first module: the logparsing tool.
path_logs = "data/Windows/"
list_files = []
for file in listdir(path_logs):
if "x" in file: # Using split command, each small file begins with a "x"
list_files.append(path_logs + "/" + file)
dataset = Dataset(list_files=list_files, parser_function=parser_function) # Generate your data
patterns = Parser(dataset).detect_pattern() # Detect patterns
Dataset(list_files=list_files, dict_patterns=patterns, saving=True, path_data="data/", name_dataset="Windows_test", path_model="model/", parser_function=parser_function, sort_function=sort_function) # Apply the detected patterns to the data
Embedding(loading=True, name_dataset="Windows_test", path_data="data/", path_model="model/").start() # Generate embedding for the LSTMNow, we can learn the correlations
size=1000000
list_cardinalities = Dataset_learning(path_model="model/", path_data="data/", name_dataset="Windows_test", size=size).run() # Create your dataset
worker = Worker(cardinalities_choosen=[4,5,6,7], list_cardinalities=list_cardinalities, path_model="model/", name_dataset="Windows_test") # Create the worker
worker.train() # Start learning the correlationsAdditionally, we can have the merged results to compare this run to other runs with other parameters
results = Results(path_model="model/", name_model="Windows_test")
results.load_files()
results.compute_results(condition="Test")
results.print_results()At the end, we can get the correlations tree.
dataset = Dataset_building(path_model="model/", name_model="Windows_test", path_data="data/Windows/Windows.log", parser_function=parser_function) # Build your dataset
dataset.load_files() # Load the model
dataset.load_logs() # Load the logs
workflow = Workflow(dataset) # Build your workflow
workflow.get_tree(index_line=24712) # Get the tree of the 2338th lineThat's it.
path_data and path_model is the path to your directory of data and models.
size is the size of your data for the learning step.
cardinalities_choosen is the cardinalities used for the learning. Other cardinalities are excluded.
https://logflow.readthedocs.io/en/latest/
marc.platini@gmail.com benoit.pelletier@atos.net
This project was partially funded by 
