- Test period - How often should the test be executed
- Host - The host for which the test is to be configured.
- port – The port at which the server listens
alertfile - Specify the path to the log file to be monitored. For eg., D:\zdm\logs\errorlog. Multiple log file paths can be provided as a comma-separated list - eg., D:\zdm\logs\errorlog,D:\zdm\logs\warnlog.
Also, instead of a specific log file path, the path to the directory containing log files can be provided - eg., D:\zdm\logs. This ensures that eG Enterprise monitors the most recent log files in the specified directory. Specific log file name patterns can also be specified. For example, to monitor the latest log files with names containing the strings 'error' and 'warn', the parameter specification can be, D:\zdm\logs\*error*,D:\zdm\logs\*warn*. Here, '*' indicates leading/trailing characters (as the case may be). In this case, the eG agent first enumerates all the log files in the specified path that match the given pattern, and then picks only the latest log file from the result set for monitoring.
Your alertfile specification can also be of the following format: Name@logfilepath_or_pattern. Here, Name represents the display name of the path being configured. Accordingly, the parameter specification for the 'error' and 'warn' example discussed above can be: errors@ D:\zdm\logs\*error*,warning@D:\zdm\logs\*warn*. In this case, the display names 'error' and 'warn' will alone be displayed as descriptors of this test.
If your alertfile specification consists of file patterns that include wildcard characters (eg.,D:\zdm\logs\*error*,D:\zdm\logs\*warn*), then such configurations will only be supported in the ANSI format, and not the UTF format.
Every time this test is executed, the eG agent verifies the following:
- Whether any changes have occurred in the size and/or timestamp of the log files that were monitoring during the last measurement period;
- Whether any new log files (that match the alertfile specification) have been newly added since the last measurement period;
If a few lines have been added to a log file that was monitored previously, then the eG agent monitors the additions to that log file, and then proceeds to monitor newer log files (if any). If an older log file has been overwritten, then, the eG agent monitors this log file completely, and then proceeds to monitor the newer log files (if any).
searchpattern - Enter the specific patterns of alerts to be monitored. The pattern should be in the following format: <PatternName>:<Pattern>, where <PatternName> is the pattern name that will be displayed in the monitor interface and <Pattern> is an expression of the form - *expr* or expr or *expr or expr*, etc. A leading '*' signifies any number of leading characters, while a trailing '*' signifies any number of trailing characters.
For example, say you specify error:error-* in the SEARCHPATTERN text box. This indicates that "error" is the pattern name to be displayed in the monitor interface. "error-*" indicates that the test will monitor only those lines in the alert log which start with the term "error-".
A single pattern may also be of the form e1+e2, where + signifies an OR condition. That is, the <PatternName> is matched if either e1 is true or e2 is true.
Multiple search patterns can be specified as a comma-separated list. For example: error:error-*,offline:*offline*,online:*online
If the alertfile specification is of the format Name@logfilepath, then the descriptor for this test in the eG monitor interface will be of the format: Name:PatternName. On the other hand, if the alertfile specification consists only of a comma-separated list of log file paths, then the descriptors will be of the format: LogFilePath:PatternName.
If you want all the messages in a log file to be monitored, then your specification would be: <PatternName>:*.
lines - Specify two numbers in the format x:y. This means that when a line in the alert file matches a particular pattern, then x lines before the matched line and y lines after the matched line will be reported in the detailed diagnosis output (in addition to the matched line). The default value here is 0:0. Multiple entries can be provided as a comma-separated list.
If you give 1:1 as the value for LINES, then this value will be applied to all the patterns specified in the SEARCHPATTERN field. If you give 0:0,1:1,2:1 as the value for LINES and if the corresponding value in the SEARCHPATTERN filed is like error:error-*,offline:*offline*,online:*online then:
0:0 will be applied to error:error-* pattern
1:1 will be applied to offline:*offline* pattern
2:1 will be applied to online:*online pattern
- excludepattern - Provide a comma-separated list of patterns to be excluded from monitoring in the EXCLUDEPATTERN text box. For example *critical*, *exception*. By default, this parameter is set to 'none'.
- uniquematch - By default, the UNIQUEMATCH parameter is set to FALSE, indicating that, by default, the test checks every line in the log file for the existence of each of the configured SEARCHPATTERNS. By setting this parameter to TRUE, you can instruct the test to ignore a line and move to the next as soon as a match for one of the configured patterns is found in that line. For example, assume that Pattern1:*fatal*,Pattern2:*error* is the SEARCHPATTERN that has been configured. If UNIQUEMATCH is set to FALSE, then the test will read every line in the log file completely to check for the existence of messages embedding the strings 'fatal' and 'error'. If both the patterns are detected in the same line, then the number of matches will be incremented by 2. On the other hand, if UNIQUEMATCH is set to TRUE, then the test will read a line only until a match for one of the configured patterns is found and not both. This means that even if the strings 'fatal' and 'error' follow one another in the same line, the test will consider only the first match and not the next. The match count in this case will therefore be incremented by only 1.
rotatingfile- This flag governs the display of descriptors for this test in the eG monitoring console.
If this flag is set to True and the alertfile text box contains the full path to a specific (log/text) file, then, the descriptors of this test will be displayed in the following format: Directory_containing_monitored_file:<SearchPattern>. For instance, if the alertfile parameter is set to c:\zdm\logs\syslog.txt, and rotatingfile is set to true, then, your descriptor will be of the following format: c:\zdm\logs:<SearchPattern>. On the other hand, if the rotatingfile flag had been set to false, then the descriptors will be of the following format: <FileName>:<SearchPattern> - i.e., syslog.txt:<SearchPattern> in the case of the example above.
If this flag is set to true and the alertfile parameter is set to the directory containing log files, then, the descriptors of this test will be displayed in the format: Configured_directory_path:<SearchPattern>. For instance, if the alertfile parameter is set to c:\zdm\logs, and rotatingfile is set to true, then, your descriptor will be: c:\zdm\logs:<SearchPattern>. On the other hand, if the rotatingfile parameter had been set to false, then the descriptors will be of the following format: Configured_directory:<SearchPattern> - i.e., logs:<SearchPattern> in the case of the example above.
If this flag is set to true and the alertfile parameter is set to a specific file pattern, then, the descriptors of this test will be of the following format: <FilePattern>:<SearchPattern>. For instance, if the alertfile parameter is set to c:\zdm\logs\*sys*, and rotatingfile is set to true, then, your descriptor will be: *sys*:<SearchPattern>. In this case, the descriptor format will not change even if the rotatingfile flag status is changed.
- casesensitive - This flag is set to No by default. This indicates that the test functions in a 'case-insensitive' manner by default. This implies that, by default, the test ignores the case of your alertfile and searchpattern specifications. If this flag is set to Yes on the other hand, then the test will function in a 'case-sensitive' manner. In this case therefore, for the test to work, even the case of your alertfile and searchpattern specifications should match with the actuals.
rolloverfile - By default, this flag is set to false. Set this flag to true if you want the test to support the 'roll over' capability of the specified alertfile. A roll over typically occurs when the timestamp of a file changes or when the log file size crosses a pre-determined threshold. When a log file rolls over, the errors/warnings that pre-exist in that file will be automatically copied to a new file, and all errors/warnings that are captured subsequently will be logged in the original/old file. For instance, say, errors and warnings were originally logged to a file named error_log. When a roll over occurs, the content of the file error_log will be copied to a file named error_log.1, and all new errors/warnings will be logged in error_log. In such a scenario, since the rolloverfile flag is set to false by default, the test by default scans only error_log.1 for new log entries and ignores error_log. On the other hand, if the flag is set to true, then the test will scan both error_log and error_log.1 for new entries.
If you want this test to support the 'roll over' capability described above, the following conditions need to be fulfilled:
The alertfile parameter has to be configured only with the name and/or path of one/more alert files. File patterns or directory specifications should not be specified in the alertfile text box.
The roll over file name should be of the format: “<alertfile>.1”, and this file must be in the same directory as the alertfile.
- overwrittenfile- By default, this flag is set to false. Set this flag to true if log files do not 'roll over' in your environment, but get overwritten instead. In such environments typically, new error/warning messages that are captured will be written into the log file that pre-exists and will replace the original contents of that log file; unlike when 'roll over' is enabled, no new log files are created for new entries in this case. If the overwrittenfile flag is set to true, then the test will scan the new entries in the log file for matching patterns. However, if the flag is set to false, then the test will ignore the new entries.
- encodeformat – By default, this is set to none, indicating that no encoding format applies by default. However, if the test has to use a specific encoding format for reading from the specified alertfile , then you will have to provide a valid encoding format here - eg., UTF-8, UTF-16, etc. Where multiple log files are being monitored, you will have to provide a comma-separated list of encoding formats – one each for every log file monitored. Make sure that your encoding format specification follows the same sequence as your alertfile specification. In other words, the first encoding format should apply to the first alert file, and so on. For instance, say that your alertfile specification is as follows:D:\logs\report.log,E:\logs\error.log, C:\logs\warn_log. Assume that while UTF-8 needs to be used for reading from report.log , UTF-16 is to be used for reading from warn_log . No encoding format need be applied to error.log. In this case, your encodeformat specification will be: UTF-8,none,UTF-16.
useutf8- If UTF-8 encoding is to be used for reading the specified log file, then, set the USEUTF8 flag to true. By default, this flag is set to false. If multiple log files are being monitored, then, for each file, you will have to indicate whether UTF-8 encoding is to be used for reading that file or not. For instance, assume that the ALERTFILE parameter is set to errors@d:\zdm\logs\error.log,warnings@d:\zdm\logs\warn.log Now, to instruct the test to use UTF-8 encoding for reading the 'errors' log file and not to use the UTF-8 encoding while reading the 'warnings' log file, your USEUTF8 setting should be as follows: true,false. Note that the number of values provided against the USEUTF8 parameter should be equal to the number of log files being monitored. Also, note that if the ALERTFILE being monitored has BOM, then the test will automatically use UTF-8 encoding to read that file, even if the USEUTF8 flag is set to false.
If your alertfile specification consists of file patterns that include wildcard characters (eg. d:\zdm\logs\*error*,d:\zdm\logs\*warn*), then the files that match such patterns will only support the ANSI format, and not the UTF format, even if the utf-8 parameter is set to true for such patterns.
- dd frequency - Refers to the frequency with which detailed diagnosis measures are to be generated for this test. The default is 1:1. This indicates that, by default, detailed measures will be generated every time this test runs, and also every time the test detects a problem. You can modify this frequency, if you so desire. Also, if you intend to disable the detailed diagnosis capability for this test, you can do so by specifying none against dd frequency.
DETAILED DIAGNOSIS - To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.
The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:
- The eG manager license should allow the detailed diagnosis capability
- Both the normal and abnormalfrequencies configured for the detailed diagnosis measures should not be 0.