In order to log into collector, open browser go to
http://zico-server:8642. After installation collector has default account
admin with password
admin that has administrators privileges.
Zorka collector is a single-screen AJAX application. On the left panel there is list of agents sending data to collector. Double click on such host and search panel with list of collected traces will appear (newest ones will appear on top).
There is a bunch of controls in trace search panel, most of them self explanatory. Search expression field (the biggest one) is most interesting of them all: user can use full-text search or regex search (if searchexpression starts with
~ character) or EQL - logical expression similiar to what is used in
where clauses in SQL. In order to use EQL expressions, click
QL button on the left of search expression field.
Introduction to EQL expressions
EQL expressions can be used either to search through top level trace list in trace search panel or to search method call tree inside a single trace in trace method search dialog.
EQL are logical expressions similiar to SQL logical expressions, for example the following expression:
trace = 'HTTP'
will filter all HTTP traces. Logical operators are also available, for example each of expressions below:
trace = 'HTTP' and STATUS <> '404' trace = 'HTTP' and not STATUS = '404'
will filter all HTTP traces except requests resulting in 404 errors.
In regard to resolving names, EQL has some predefined set of attributes (listed below) and tries to use attribute names if present. In above examples
trace is a built in symbol and
STATUS is just attibute attached to trace by zorka agent. If there is no builtin nor attribute matching given symbol, it will be resolved as
null, so for example:
trace = 'HTTP' and REDIRECT <> null
will filter all HTTP requests with redirection.
The following names are built in:
method- class ot method name of recorded method call of a trace (either root method in trace search panelor any recorded method in method search dialog inside a trace);
trace- trace type, eg.
time- trace execution time (or method execution time); this uses suffixes, eg.
10msstands for 10 milliseconds,
3sstands for 3 seconds etc.
errors- number of registered method calls or errors in trace (or method call tree node);
host- host name (as advertised by zorka agent) on which trace has been recorded;