fetch value from json using powershell - powershell

Question

I have the below JSON which I am getting after executing certain commands
cluster.status()
{
"clusterName": "ICluster",
"defaultReplicaSet": {
"name": "default",
"primary": "?",
"ssl": "REQUIRED",
"status": "ERROR",
"statusText": "Cluster has no quorum as visible from 'X92A1DB:3306' and no ONLINE members that can be used to restore it. 3 members are not active.",
"topology": {
"X92A1DB:3306": {
"address": "X92A1DB:3306",
"instanceErrors": [
"ERROR: group_replication has stopped with an error."
],
"memberRole": "SECONDARY",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "ERROR",
"version": "5.7.36"
},
"X92A2DB:3306": {
"address": "X92A2DB:3306",
"instanceErrors": [
"ERROR: split-brain! Instance is not part of the majority group, but has state ONLINE"
],
"memberRole": "SECONDARY",
"memberState": "ONLINE",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "(MISSING)",
"version": "5.7.36"
},
"X92A3DB:3306": {
"address": "X92A3DB:3306",
"instanceErrors": [
"ERROR: split-brain! Instance is not part of the majority group, but has state ONLINE",
"WARNING: Instance is NOT a PRIMARY but super_read_only option is OFF."
],
"memberRole": "SECONDARY",
"memberState": "ONLINE",
"mode": "R/O",
"readReplicas": {},
"role": "HA",
"status": "(MISSING)",
"version": "5.7.36"
}
},
"topologyMode": "Single-Primary",
"warning": "The cluster description may be inaccurate as it was generated from an instance in Error state"
},
"groupInformationSourceMember": "X921DB:3306"
}
I need to identify the node name X92A1DB:3306 and having "status": "ERROR" or have to get "ERROR: group_replication has stopped with an error."
Based on which I need to execute further commands.
Below is the code using which I am getting the above output (output of Cluster.status())
$NewServerList=#()
$GetServerData = #(Import-Csv -Path "E:\MySQL_Cluster\NONPRODServerDetails.csv")
foreach($S_List in $GetServerData)
{
$S_1 = $S_List.IP
$session = New-SSHSession -ComputerName $S_1 -Credential $Mysqlcred
$Strem = New-SSHShellStream -SSHSession $Session
$cmd_1 = $Strem.WriteLine("sudo su - mysql")
sleep -Seconds 5
$Strem.read()
$cmd_5 = $Strem.WriteLine("var cluster = dba.getCluster('ICluster')")
sleep -Seconds 5
$IBCL = $Strem.read()
Write-Host $IBCL
$statustowrite = $Strem.WriteLine("cluster.status()")
sleep -Seconds 5
"Initial Cluster Status"| Out-File -FilePath $OutputFile -Force -Append
"==============================================="|Out-File -FilePath $OutputFile -Force -Append
$Strem.Read() | Out-File -FilePath $OutputFile -Force -Append
"==============================================="| Out-File -FilePath $OutputFile -Force -Append
}
Please let me know how to get it.

Answer 1

This should work
(Get-Content "path_to_json" | Select-Object -Skip 1) | ConvertFrom-Json