Kibana doesn’t tell you what version your nodes are currently running which can be frustrating if you get distracted during an upgrade process. Here is a simple PowerShell script that gets all the nodes and their current version.
$cred = Get-Credential
$nodes_raw = Invoke-RestMethod -Method Get -Uri "http://elasticsearch:9200/_nodes" -Credential $cred
#get the names of each node
$node_names = $nodes_raw.nodes | Get-Member -MemberType NoteProperty | Select -ExpandProperty Name
#convert from object properties to an array of objects
$nodes = foreach ($node_name in $node_names) {
$nodes_raw.nodes."$node_name"
}
# Select desired info about the node
$nodes | select name, version
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