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New Feature Request
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Resolution: Fixed
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Major
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None
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Sprint 52 (May 2019), Sprint 53 (Jun 2019), Sprint 54 (Jul 2019)
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5
Together with ZBXNEXT-4200 and ZBXNEXT-4163, support of 'advanced' JSON Path expressions is required to select specific JSON object's attribute from the item.
For example (mentioned in ZBXNEXT-4163)
Is there any possibility of using LLD MACROS in item preprocessing.
For example process JSON based on LLD result:
like:
1.
| [JSON Path] |
$.data[?(@.CHECKNAME == '{#CHECKNAME}' )].value
|
2. Another example from openstack cinder:
JSON response:
{
"pools": [
{
"capabilities": {
"QoS_support": false,
"allocated_capacity_gb": 3,
"driver_version": "3.0.0",
"filter_function": null,
"free_capacity_gb": 7.01,
"goodness_function": null,
"location_info": "LVMVolumeDriver:devstack-ubuntu16:stack-volumes-lvmdriver-1:default:0",
"max_over_subscription_ratio": 1.0,
"multiattach": true,
"pool_name": "lvmdriver-1",
"provisioned_capacity_gb": 3.0,
"reserved_percentage": 0,
"storage_protocol": "iSCSI",
"thick_provisioning_support": true,
"thin_provisioning_support": false,
"timestamp": "2017-10-17T13:14:17.014588",
"total_capacity_gb": 10.01,
"total_volumes": 2,
"vendor_name": "Open Source",
"volume_backend_name": "lvmdriver-1"
},
"name": "devstack-ubuntu16@lvmdriver-1#lvmdriver-1"
},
{
"capabilities": {
"QoS_support": false,
"allocated_capacity_gb": 0,
"driver_version": "3.0.0",
"filter_function": null,
"free_capacity_gb": 8.01,
"goodness_function": null,
"location_info": "LVMVolumeDriver:devstack-ubuntu16:stack-volumes-lvmdriver-1:default:0",
"max_over_subscription_ratio": 1.0,
"multiattach": true,
"pool_name": "lvmdriver-1",
"provisioned_capacity_gb": 3.0,
"reserved_percentage": 0,
"storage_protocol": "iSCSI",
"thick_provisioning_support": true,
"thin_provisioning_support": false,
"timestamp": "2017-10-17T13:14:21.222133",
"total_capacity_gb": 10.01,
"total_volumes": 2,
"vendor_name": "Open Source",
"volume_backend_name": "lvmdriver-1"
},
"name": "devstack-ubuntu16@custom-type#lvmdriver-1"
}
]
}
In order to get free space from specific pool you would need JSON path like this to work in preprocessing:
$.pools[?(@.name == "devstack-ubuntu16@custom-type#lvmdriver-1")].capabilities.free_capacity_gb
And It looks like that this is not going to work at the moment.
More expression examples:
http://goessner.net/articles/JsonPath/
