Livestatus command reference
This article is just a draft and not yet finished!
1. Available tables
The following tables are available for use in Livestatus. Some of them additionally function over the columns of another table. These columns will be identified by the table's name as a prefix:
| Table | Comments |
|---|---|
| hosts | Contains all information for the configured hosts. |
| services | Contains all information for the configured services, and additionally the columns from hosts. |
| hostgroups | Information for the host groups. |
| servicegroups | Information for the service groups. |
| contactgroups | Information for the contact groups. |
| servicesbygroup | As for services, but additionally with the columns from servicegroups. |
| servicesbyhostgroup | Like services, but additionally with the columns from hostgroups. |
| hostsbygroup | Like hosts, but additionally with the columns from hostgroups. |
| contacts | Information for the contacts. |
| commands | All configured Check-Commands, as found for a service under Service check command. |
| timeperiods | All information for the configured Time Periods. |
| downtimes | As for timeperiods, but for scheduled maintenance times. |
| comments | Contains all information for comments, and in addition the columns from hosts and services. |
| log | All information for logged events. These should be filtered by class and time stamp/time period. |
| status | Information for the core's status and performance. |
| columns | All available tables will be listed here. Additionally,a description of all of a table's columns is also provided. |
| statehist | The past-statuses for a host/service can be comprehensively searched with this table. |
| eventconsoleevents | Lists all of the Event Console's events. This table additionally has all columns from hosts. |
| eventconsolehistory | Like eventconsoleevents, but also with additional columns for an event's history. |
| eventconsolestatus | Lists statistics from the performance of the Event Console. |
| eventconsolerules | Statistics for how often the rule-matching for an incoming event was successful. |
Should you wish to know which columns a table uses, these can be easily shown with the following command:
OMD[mysite]:~$ lq "GET columns\nColumns: name\nFilter: table = columns" description name table type
Other tables can also be selected by using filters. All of the columns available for searching by column and table can be seen in the output from the example shown.
2. Available headers
| Header | Argument | Function |
|---|---|---|
| Columns | Column name | Restricts the output to the specified columns |
| Filter | Column name, operator and object name | Restricts the output to the defined object. See also filter. |
| OR | Integer | Links the last n filter(s) with a logical OR |
| AND | Ganzzahl | Links the last n filter(s) with a logical AND |
| NEGATE | Integer | Inverts the last n Filter(s) |
| Separators | ASCII-values | Defines the characters for separating elements |
| OutputFormat | Name | Defines an alternative output format for the data. Possible formats are json, python, python3, CSV and csv (the standard format) |
| Stats | Operator and column names | Generates statistics for specified columns |
| StatsOr | Integer | Provides the OR-header's functions in the statistics |
| StatsAnd | Integer | Provides the AND-header's functions in the statistics |
| StatsNegate | Integer | Provides the NEGATE-header's functions in the statistics |
| Limit | Integer | Limits the output to n lines |
| Timelimit | Integer | Restricts the time allowed for processing the query to n seconds |
| ColumnHeaders | - | The first line of the output contains the name of the column used. If the header ResponseHeader has additionally been set, the column name will be output in the second line |
| AuthUser | User Name | Restricts the output to the lines that the specified user is authorised to see |
| WaitObject | Object Name | The object for which a specified behaviour is expected. This is the object's name, or respectively in the case of the services table, the host's name followed by a blank character, followed in turn by the service description. If the host name itself contains blank characters the two elements can also be separated by a semicolon. This header is only supported by the hosts, services hostgroups servicegroups contacts and contactgroups tables |
| WaitCondition | FilterCondition | The condition that must be satisfied for the defined object. Any desired number of conditions can be defined – these are linked together with a logical and |
| WaitConditionOr | Integer | Provides the OR-header function in the Wait-conditions |
| WaitConditionAnd | Integer | Provides the AND-header function in the Wait-conditions |
| WaitConditionNegate | Integer | Provides the NEGATE-header function in the Wait-conditions |
| WaitTrigger | Keyword* | Keywords work like a normal condition if they are set by themselves. In combination with the WaitCondition this simplifies the locating of relevant log entries and reduces the overhead in Livestatus |
| WaitTimeout | Integer | Sets a time limit in milliseconds. Following, for example, 5000 Milliseconds (5 seconds), the query will be executed even if the condition has not been satisfied |
| Localtime | Unix Time | By using a specified reference time it is attempted to compensate for differing local time stamps in a distributed environment |
| ResponseHeader | fixed16/off | Returns a status line in the first line of the response. The output itself remains in the first line if the header ColumnHeaders has additionally been set |
| KeepAlive | on | Prevents the Livestatus-channel being closed following a query |
* The following keywords are available for the WaitTrigger:
- check
- state
- log
- downtime
- comment
- command
- program
- all
3. Operators for filters
3.1. General operators
| Operator* | For numbers | For character strings |
|---|---|---|
| = | Equality | Equality |
| ~ | Superset** | Contains a character string as a regular expression. |
| =~ | Subset** | Case-insensitive equality |
| ~~ | Contains at least one of the values** | Contains a case-insensitive character string as a regular expression |
| < | Smaller than | Lexicographically smaller than |
| > | Larger than | Lexicographically larger than |
| <= | Smaller or equal | Lexicographically smaller or equal |
| >= | Larger or equal | Lexicographically larger or equal |
* All operators can be negated with an exclamation mark (!).
** These operators are useful when working with lists. Livestatus then interprets the specified values as a quantity.
3.2. Operators for lists
You can check whether an element is included in a list using the following operators:
| Operator | Type of check |
|---|---|
| = | Checks for empty lists* |
| >= | Equality |
| < | Disparity |
| <= | Case-insensitive equality |
| > | Case-insensitive disparity |
| ~ | The character string for a regular expression* |
| ~~ | The case-insensitive character string for a regular expression* |
* These operators can be negated with an exclamation mark (!).
4. Operators for statistics
| Operator | Description |
|---|---|
| sum | Generates a sum from the values |
| min | Searches for the smallest value |
| max | Searches for the highest value |
| avg | Calculates an average value (mean value) |
| std | Outputs the standard deviation |
| suminv | Inverts the sum of the values according to 1/sum |
| avginv | Inverts the mean value of the values according to 1/avg |
5. Status codes from the ResponseHeader
| Status code | Description |
|---|---|
| 200 | The query was successful and the response contains the requested data |
| 400 | The query contains a faulty header |
| 404 | The table could not be found |
| 413 | The time limit for the query has been exceeded |
| 451 | The query was incompletely transferred |
| 452 | The query is completely invalid |
6. Commands
The following commands are available for you in all editions of Checkmk:
Kommandos, welche Ihnen nur mit dem CMC in den 
Checkmk
| Kommando | Beschreibung |
|---|---|
| Hostkommandos | |
| PROCESS_HOST_PERFDATA | tba |
| UPDATE_SHADOW_HOST_STATE | tba |
| Servicekommandos | |
| PROCESS_SVC_PERFDATA | tba |
| UPDATE_SHADOW_SERVICE_STATE | tba |
| Andere Kommandos | |
| LOG | tba |
| MK_LOGWATCH_ACKNOWLEDGE | tba |
| RELOAD_CONFIG | tba |
| REOPEN_DAEMONLOG | tba |
| ROTATE_LOGFILE | tba |
| SEGFAULT | tba |