GKE - conect to kubernetes cluster and get CPU allocations

 gcloud container clusters get-credentials observability-production --region europe-west3

# Show Current Kubernetes Cluster

kubectl config current-context

 

# Show all configured Kubernetes Clusters

kubectl config get-clusters

# Get all Pods CPU limits from namespace loki

kubectl get po -n loki -o jsonpath="{.items[*].spec.containers[*].resources['limits.cpu']}

# Get all Pods CPU, RAM limits from namespace loki

 kubectl get po -n loki -o jsonpath="{.items[*].spec.containers[*].resources['limits.cpu','limits.memory']}"

 

Perl script to calculate allocated CPUs for particular namespace

 #/usr/bin/perl  
 $gcloud_auth=`gcloud container clusters get-credentials observability-production --region europe-west3`;  
 $context = `kubectl config current-context`;  
 print "Kubernetes Context: $context";  
 $cpu_line = `kubectl get po -n loki -o jsonpath="{.items[*].spec.containers[*].resources['limits.cpu']}"`;  
 print "CPU limits: $cpu_line\n";  
 my @cpu = split(' ', $cpu_line);  
 $total_cpu_cores = 0;  
 foreach (@cpu) {  
  $unit = substr($_, -1, 1);  
  if ($unit eq "m") {  
   $cpu = substr($_, 0, - 1);  
   $cpu = $cpu / 1000;  
  } else {  
   $cpu = $_;  
  }  
  $total_cpu_cores += $cpu;  
 }  
 print "Total CPU cores: $total_cpu_cores\n";  

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