support for node limits

kraken/chaos_recommender/prometheus.py

@@ -17,16 +17,41 @@ def convert_data_to_dataframe(data, label):
 
 
 def convert_data(data, service):
+    result = {}
+    for entry in data:
+        pod_name = entry['metric']['pod']
+        value = entry['value'][1]
+        result[pod_name] = value
+    return result.get(service) # for those pods whose limits are not defined they can take as much resources, there assigning a very high value
+
 
+def convert_data_limits(data, node_data, service, prometheus):
     result = {}
     for entry in data:
         pod_name = entry['metric']['pod']
         value = entry['value'][1]
         result[pod_name] = value
-    return result.get(service, '100000000000') # for those pods whose limits are not defined they can take as much resources, there assigning a very high value
+    return result.get(service, get_node_capacity(node_data, service, prometheus)) # for those pods whose limits are not defined they can take as much resources, there assigning a very high value
+
+def get_node_capacity(node_data, pod_name, prometheus ):
+
+    # Get the node name on which the pod is running
+    query = f'kube_pod_info{{pod="{pod_name}"}}'
+    result = prometheus.custom_query(query)
+    if not result:
+        return None
 
+    node_name = result[0]['metric']['node']
+
+    for item in node_data:
+        if item['metric']['node'] == node_name:
+            return item['value'][1]
+
+    return '1000000000'
+
+
+def save_utilization_to_file(utilization, filename, prometheus):
 
-def save_utilization_to_file(utilization, filename):
     merged_df = pd.DataFrame(columns=['namespace', 'service', 'CPU', 'CPU_LIMITS', 'MEM', 'MEM_LIMITS', 'NETWORK'])
     for namespace in utilization:
         # Loading utilization_data[] for namespace
@@ -41,9 +66,9 @@ def save_utilization_to_file(utilization, filename):
             new_row_df = pd.DataFrame({
                 "namespace": namespace, "service": s,
                 "CPU": convert_data(utilization_data[0], s),
-                "CPU_LIMITS": convert_data(utilization_data[1], s),
+                "CPU_LIMITS": convert_data_limits(utilization_data[1],utilization_data[5], s, prometheus),
                 "MEM": convert_data(utilization_data[2], s),
-                "MEM_LIMITS": convert_data(utilization_data[3], s),
+                "MEM_LIMITS": convert_data_limits(utilization_data[3], utilization_data[6], s, prometheus),
                 "NETWORK": convert_data(utilization_data[4], s)}, index=[0])
             merged_df = pd.concat([merged_df, new_row_df], ignore_index=True)
 
@@ -55,11 +80,11 @@ def save_utilization_to_file(utilization, filename):
     merged_df['NETWORK'] = merged_df['NETWORK'].astype(str)
 
     # Extract integer part before the decimal point
-    merged_df['CPU'] = merged_df['CPU'].str.split('.').str[0]
-    merged_df['MEM'] = merged_df['MEM'].str.split('.').str[0]
-    merged_df['CPU_LIMITS'] = merged_df['CPU_LIMITS'].str.split('.').str[0]
-    merged_df['MEM_LIMITS'] = merged_df['MEM_LIMITS'].str.split('.').str[0]
-    merged_df['NETWORK'] = merged_df['NETWORK'].str.split('.').str[0]
+    #merged_df['CPU'] = merged_df['CPU'].str.split('.').str[0]
+    #merged_df['MEM'] = merged_df['MEM'].str.split('.').str[0]
+    #merged_df['CPU_LIMITS'] = merged_df['CPU_LIMITS'].str.split('.').str[0]
+    #merged_df['MEM_LIMITS'] = merged_df['MEM_LIMITS'].str.split('.').str[0]
+    #merged_df['NETWORK'] = merged_df['NETWORK'].str.split('.').str[0]
 
     merged_df.to_csv(filename, sep='\t', index=False)
 
@@ -84,20 +109,27 @@ def fetch_utilization_from_prometheus(prometheus_endpoint, auth_token,
         cpu_limits_query = '(sum by (pod) (kube_pod_container_resource_limits{resource="cpu", namespace="%s"}))*1000' %(namespace)
         cpu_limits_result = prometheus.custom_query(cpu_limits_query)
 
+        node_cpu_limits_query = 'kube_node_status_capacity{resource="cpu", unit="core"}*1000'
+        node_cpu_limits_result = prometheus.custom_query(node_cpu_limits_query)
+
         mem_query = 'sum by (pod) (avg_over_time(container_memory_usage_bytes{image!="", namespace="%s"}[%s]))' % (namespace, scrape_duration)
         mem_result = prometheus.custom_query(mem_query)
 
         mem_limits_query = 'sum by (pod) (kube_pod_container_resource_limits{resource="memory", namespace="%s"})  ' %(namespace)
         mem_limits_result = prometheus.custom_query(mem_limits_query)
 
+        node_mem_limits_query = 'kube_node_status_capacity{resource="memory", unit="byte"}'
+        node_mem_limits_result = prometheus.custom_query(node_mem_limits_query)
+
         network_query = 'sum by (pod) ((avg_over_time(container_network_transmit_bytes_total{namespace="%s"}[%s])) + \
         (avg_over_time(container_network_receive_bytes_total{namespace="%s"}[%s])))' % (namespace, scrape_duration, namespace, scrape_duration)
         network_result = prometheus.custom_query(network_query)
 
-        utilization[namespace] = [cpu_result, cpu_limits_result, mem_result, mem_limits_result, network_result]
+        utilization[namespace] = [cpu_result, cpu_limits_result, mem_result, mem_limits_result, network_result, node_cpu_limits_result, node_mem_limits_result ]
         queries[namespace] = json_queries(cpu_query, cpu_limits_query, mem_query, mem_limits_query, network_query)
 
-    save_utilization_to_file(utilization, saved_metrics_path)
+    save_utilization_to_file(utilization, saved_metrics_path, prometheus)
+
     return saved_metrics_path, queries