Extract value from json using powershell - powershell

Question

I am having the below json
{
"clusterName": "IBDCluster",
"defaultReplicaSet": {
"name": "default",
"primary": "X92SL224XXX2XX:3306",
"ssl": "REQUIRED",
"status": "OK_NO_TOLERANCE",
"statusText": "Cluster is NOT tolerant to any failures. 1 member is not active.",
"topology": {
"X92SL224XXX1XX:3306": {
"address": "X92SL224XXXXXXX:3306",
"memberRole": "SECONDARY",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "ONLINE",
"version": "5.7.36"
},
"X92SL224XXX2XX:3306": {
"address": "X92SL224XXX2XX:3306",
"memberRole": "PRIMARY",
"mode": "R/W",
"readReplicas": {},
"role": "HA",
"status": "ONLINE",
"version": "5.7.36"
},
"X92SL224XXXX3XX:3306": {
"address": "X92SL224XXX3XX:3306",
"instanceErrors": [
"ERROR: group_replication has stopped with an error."
],
"memberRole": "SECONDARY",
"memberState": "ERROR",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "(MISSING)",
"version": "5.7.36"
}
},
"topologyMode": "Single-Primary"
},
"groupInformationSourceMember": "X92SL224XXXXXXX:3306"
}
I need to extract value like memberRole, status from the topology section.
when I go to the topology part
$ClusterDetails = $ClusterStatus.defaultReplicaSet.topology
the $ClusterDetails have value like (data visible only for 2 servers but all 3 servers are present)
PS C:\Windows\system32> $ClusterDetails
X92SL224XXXX1XX:3306 X92SL224XXXX2XX:3306
-------------------- --------------------
#{address=X92SL224XXXX1XX:3306; memberRole=SECONDARY; mode=R/O; readReplicas=; role=HA; status=ONLINE; version=5.7.36} #{address=X92SL224XXXX2XX:3306; memberRole=PRIM...
from shell I am able to see the individual output if i select like
PS C:\Windows\system32> $ClusterDetails.'X92SL224XXXX1XX:3306'
address : X92SL224XXXX1XX:3306
memberRole : PRIMARY
mode : R/W
readReplicas :
role : HA
status : ONLINE
version : 5.7.36
I need help to fetch the data from $ClusterDetails for individual servers like above but not getting how to get that dot part via script. please let me know how to do that.

Answer 1

Quite a long statement but this should work:
$json.defaultReplicaSet.topology.PSObject.Properties.Value | Select-Object memberRole, status
# Results in:
memberRole status
---------- ------
SECONDARY ONLINE
PRIMARY ONLINE
SECONDARY (MISSING)
You can access the Values of each Property of the Object in $json.defaultReplicaSet.topology accessing the PSObject Properties.
It's worth noting that .PSObject.Properties.Value works to enumerate all Property Values at once due to Member-Access Enumeration.
The same can be accomplished using a loop, for example:
foreach($property in $json.defaultReplicaSet.topology.PSObject.Properties) {
[pscustomobject]#{
ThisProperty = $property.Name
memberRole = $property.Value.memberRole
status = $property.Value.status
}
}