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llq (Live Log Query)

llq enables responsively quering your structured json logs to understand your application

Query Syntax

  • msg: Filters to logs that have the msg key and displays only the value of this key for each log
  • level == 'error', msg: Filters to error logs with msg keys and displays both the level and msg
  • level == 'error', *: Similar to above, but the wildcard means the entire log object is displayed
  • sequence > 20, sequence < 30, msg: Binary comparisons are implemented for integers

Queries are made of a comma separated list of expressions. An expression contains a json path and optionally an operation and rhs

level
foo.bar.baz
array.5.key1
level == 'info'
count == 5
count > 5
count < 5
name > 'a'
*             # a wildcard is a special type of path specifier that matches all paths