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Configuration.md

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Configuration

All configurations in URI Drain are done using uri_drain.ini file. Here is a specific demo.

Snapshot

Snapshot is used to serialize and store the analysis results that have been saved in the current system. Currently, it supports saving snapshots to the file system.

Name Type(Unit) Environment Key Default Description
file_dir string SNAPSHOT_FILE_PATH /tmp/ The directory to save the snapshot, the persistent would disable when the value is empty.
snapshot_interval_minutes int(minute) SNAPSHOT_INTERVAL_MINUTES 10 The interval to save the snapshot.
compress_state bool SNAPSHOT_COMPRESS_STATE True Whether to compress the snapshot through zlib with base64.

Masking

When aggregation methods are detected, Masking determines how to generate the aggregation information.

Currently, all similar content is replaced with {var} by default.

Name Type(Unit) Environment Key Default Description
mask_prefix string MASKING_PREFIX { The prefix to mask the parameter.
mask_suffix string MASKING_SUFFIX } The suffix to mask the parameter.

Drain

Drain is the core algorithm of URI Drain.

Name Type(Unit) Environment Key Default Description
sim_th float DRAIN_SIM_TH 0.4 The similarity threshold to decide if a new sequence should be merged into an existing cluster.
depth int DRAIN_DEPTH 4 Max depth levels of pattern. Minimum is 2.
max_children int DRAIN_MAX_CHILDREN 100 Max number of children of an internal node.
max_clusters int DRAIN_MAX_CLUSTERS 1024 Max number of tracked clusters (unlimited by default). When this number is reached, model starts replacing old clusters with a new ones according to the LRU policy.
extra_delimiters string DRAIN_EXTRA_DELIMITERS ["/"] The extra delimiters to split the sequence.
analysis_min_url_count int DRAIN_ANALYSIS_MIN_URL_COUNT 20 The minimum number of unique URLs(each service) to trigger the analysis.
combine_min_url_count int DRAIN_COMBINE_MIN_URL_COUNT 3 The minimum number of unique URLs(candidate of each service) to mask as variable URL(encase some similar URL are not restful, such as /test/one and test/two).

Profiling

Profiling is used to enable the profiling of the algorithm.

Name Type(Unit) Environment Key Default Description
enabled bool PROFILING_ENABLED False Whether to enable the profiling.
report_sec int(second) PROFILING_REPORT_SEC 30 The interval to report the profiling information.

Configuration with Environment Variables

In the configuration, you can see that most of the configurations are in the format ${xxx:config_value}. It means that when the program starts, the agent would first read the xxx from the system environment variables in the runtime. If it cannot be found, the value would be used as the config_value as value.