sla.getsli

Description

object sla.getsli(object parameters)

This method allows to calculate the Service Level Indicator (SLI) data for a Service Level Agreement (SLA).

This method is available to users of any type. Permissions to call the method can be revoked in user role settings. See User roles for more information.

Parameters

(object) Parameters containing the SLA ID, reporting periods and, optionally, the IDs of the services - to calculate the SLI for.

Parameter Type Description
slaid ID ID of the SLA to return availability information for.

Parameter behavior:
- required
period_from timestamp Starting timestamp (inclusive) to report the SLI for.

Possible values: Unix timestamp.
period_to timestamp Ending timestamp (inclusive) to report the SLI for.

Possible values: Unix timestamp.
periods integer Number of periods to report.

Possible values: 1-100
serviceids ID/array IDs of services to return the SLI for.

Partitioning of periods

The following table demonstrates the arrangement of returned period slices based on combinations of parameters.

Returned periods do not precede the first available period (based on the effective date of the SLA) and do not exceed the current period.

Parameters Returned periods
period_from period_to periods
- - - Last 20 periods, including the current one.
- - N Last N periods.
- specified - Last 20 periods before period_to.
- specified N Last N periods before period_to.
specified - - First 20 periods starting with period_from.
specified - N First N periods starting with period_from.
specified specified - Up to 100 periods in the specified range.
specified specified N N periods in the specified range.

Return values

(object) Returns the results of the calculation.

Property Type Description
periods array List of the reported periods.

Each reported period is represented as an object consisting of:
- period_from - (timestamp) Starting timestamp (inclusive) of the reported period.
- period_to - (timestamp) Ending timestamp (exclusive) of the reported period.

Periods are sorted by period_from, with earliest periods appearing first.
serviceids array List of service IDs in the reported periods.

The sorting order of the list is not defined. Even if serviceids parameter was passed to the sla.getsli method.
sli array SLI data (as a two-dimensional array) for each reported period and service.

The index of the periods property is used as the first dimension of the sli property.

The index of the serviceids property is used as the second dimension of the sli property.

SLI data

The SLI data returned for each reported period and service consists of:

Property Type Description
uptime integer Amount of time service spent in an OK state during scheduled uptime, less the excluded downtimes.
downtime integer Amount of time service spent in a not OK state during scheduled uptime, less the excluded downtimes.
sli float SLI (per cent of total uptime), based on uptime and downtime.
error_budget integer Error budget (in seconds), based on the SLI and the SLO.
excluded_downtimes array Array of excluded downtimes in this reporting period.

Each object will contain the following parameters:
- name - (string) Name of the excluded downtime.
- period_from - (timestamp) Starting timestamp (inclusive) of the excluded downtime.
- period_to - (timestamp) Ending timestamp (exclusive) of the excluded downtime.

Excluded downtimes are sorted by period_from, with earliest periods appearing first.

Examples

Calculating SLI for a daily SLA

Retrieve SLI data for services with IDs "1" and "4" that are linked to the SLA with ID "1". Retrieve data for a single period until "1761861599" (Oct 30 2025 23:59:59 GMT+0200). Since the reporting period of the SLA is daily, SLI data is retrieved from "1761775200" (Oct 30 2025 00:00:00 GMT+0200) to "1761861600" (Oct 31 2025 00:00:00 GMT+0200).

Request:

{
           "jsonrpc": "2.0",
           "method": "sla.getsli",
           "params": {
               "slaid": "1",
               "serviceids": [
                   1,
                   4
               ],
               "periods": 1,
               "period_to": 1761861599,
           },
           "id": 1
       }

Response:

{
           "jsonrpc": "2.0",
           "result": {
               "periods": [
                   {
                       "period_from": 1761775200,
                       "period_to": 1761861600
                   }
               ],
               "serviceids": [
                   1,
                   4
               ],
               "sli": [
                   [
                       {
                           "uptime": 43843,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance OCT",
                                   "period_from": 1761825600,
                                   "period_to": 1761829200
                               }
                           ]
                       },
                       {
                           "uptime": 32225,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": []
                       }
                   ]
               ]
           },
           "id": 1
       }

Calculating SLI for a monthly SLA

Retrieve SLI data on services with IDs "50", "60" and "70" that are linked to the SLA with ID "5". Retrieve data for three periods starting from "1635724800" (Nov 01 2021 00:00:00 UTC). Since the reporting period of the SLA is monthly, SLI data is retrieved for the following three months:

  • From "1635724800" (Nov 01 2021 00:00:00 UTC) to "1638316800" (Dec 01 2021 00:00:00 UTC)
  • From "1638316800" (Dec 01 2021 00:00:00 UTC) to "1640995200" (Jan 01 2022 00:00:00 UTC)
  • From "1640995200" (Jan 01 2022 00:00:00 UTC) to "1643673600" (Feb 01 2022 00:00:00 UTC)

Request:

{
           "jsonrpc": "2.0",
           "method": "sla.getsli",
           "params": {
               "slaid": "5",
               "serviceids": [
                   50,
                   60,
                   70
               ],
               "periods": 3,
               "period_from": "1635724800"
           },
           "id": 1
       }

Response:

{
           "jsonrpc": "2.0",
           "result": {
               "periods": [
                   {
                       "period_from": 1635724800,
                       "period_to": 1638316800
                   },
                   {
                       "period_from": 1638316800,
                       "period_to": 1640995200
                   },
                   {
                       "period_from": 1640995200,
                       "period_to": 1643673600
                   }
               ],
               "serviceids": [
                   50,
                   60,
                   70
               ],
               "sli": [
                   [
                       {
                           "uptime": 1186212,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Nov 25 - Dec 01",
                                   "period_from": 1637836212,
                                   "period_to": 1638316800
                               }
                           ]
                       },
                       {
                           "uptime": 1186212,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Nov 25 - Dec 01",
                                   "period_from": 1637836212,
                                   "period_to": 1638316800
                               }
                           ]
                       },
                       {
                           "uptime": 1186212,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Nov 25 - Dec 01",
                                   "period_from": 1637836212,
                                   "period_to": 1638316800
                               }
                           ]
                       }
                   ],
                   [
                       {
                           "uptime": 1147548,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Dec 02 - Dec 10",
                                   "period_from": 1638439200,
                                   "period_to": 1639109652
                               }
                           ]
                       },
                       {
                           "uptime": 1147548,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Dec 02 - Dec 10",
                                   "period_from": 1638439200,
                                   "period_to": 1639109652
                               }
                           ]
                       },
                       {
                           "uptime": 1147548,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": [
                               {
                                   "name": "Maintenance Dec 02 - Dec 10",
                                   "period_from": 1638439200,
                                   "period_to": 1639109652
                               }
                           ]
                       }
                   ],
                   [
                       {
                           "uptime": 1674000,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": []
                       },
                       {
                           "uptime": 1674000,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": []
                       },
                       {
                           "uptime": 1674000,
                           "downtime": 0,
                           "sli": 100,
                           "error_budget": 0,
                           "excluded_downtimes": []
                       }
                   ]
               ]
           },
           "id": 1
       }

Source

CSla::getSli() in ui/include/classes/api/services/CSla.php