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  1. Docs for Red Hat Developers
  2. RHDEVDOCS-3277

Entry out of order when forward logs to loki

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      Some records was not forward to Loki. huge amounts of messages in flushed log

      failed to POST http://loki-server.loki-aosqe.svc:3100/loki/api/v1/push (400 Bad Request entry with timestamp 2021-08-18 05:41:10.373584 +0000 UTC ignored, reason: 'entry out of order' for stream:

      {fluentd_thread="flush_thread_0", log_type="audit"},

      level=warn ts=2021-08-18T09:25:17.228731133Z caller=grpc_logging.go:38 duration=64.564µs method=/logproto.Pusher/Push err="rpc error: code = Code(400) desc = entry with timestamp 2021-08-18 09:25:14.681496 +0000 UTC ignored, reason: 'entry out of order' for stream:
      {fluentd_thread=\"flush_thread_0\", log_type=\"infrastructure\"},\nentry with timestamp 2021-08-18 09:25:14.682497 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="infrastructure"}


      Step to reproduce:
      1. Deploy loki single process

      oc new-project loki-aosqe
      oc project loki-aosqe
      oc create sa loki-sa
      oc adm policy add-scc-to-user privileged system:serviceaccount:loki-aosqe:loki-sa

      wget https://raw.githubusercontent.com/grafana/loki/v2.3.0/cmd/loki/loki-local-config.yaml -O local-config.yaml
      oc create cm loki-config --from-file=loki-config.yaml=loki-config.yaml



       echo "kind: Deployment
apiVersion: apps/v1
metadata:
  name:  loki-server
  labels:
    provider: aosqe
    component: "loki"
    appname: loki-server
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      provider: aosqe
      component: "loki"
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        provider: aosqe
        component: "loki"
        appname: loki-server
    spec:
      serviceAccount: loki-sa
      serviceAccountName: loki-sa
      containers:
      - name: "loki"
        image: docker.io/grafana/loki:2.3.0
        imagePullPolicy: IfNotPresent
        securityContext:
          privileged: true
          procMount: Default
        ports:
        - containerPort: 3100
          name: tcp
          protocol: TCP
        volumeMounts:
        - mountPath: /etc/loki
          name: lokiconfig
          readOnly: true
      volumes:
      - configMap:
          defaultMode: 420
          name: loki-config
        name: lokiconfig
">loki-deployment.yaml


      oc create -f loki-deployment.yaml
      oc expose deployment loki-server

      2. forward audit log to loki 
      echo "apiVersion: logging.openshift.io/v1
kind: ClusterLogForwarder
metadata:
  name: instance
  namespace: openshift-logging
spec:
  outputs:
  outputs:
  - name: loki-server
    type: loki
    url: http://loki-server.loki-aosqe.svc:3100
  pipelines:
    - name: to-loki
      inputRefs:
      - application
      outputRefs:
      - loki-server">loki-clf.yaml
oc create -f loki-clf.yaml


      3. Check the fluentd loki pod logs.


      Actual result:
      1) Logs of warn messages in fluentd pod. Please refer to the attached logs

      2) Loki report ntry out of order' for stream: 
      


      
level=warn ts=2021-08-18T06:06:51.553183641Z caller=grpc_logging.go:38 method=/logproto.Pusher/Push duration=90.326µs err="rpc error: code = Code(400) desc = entry with timestamp 2021-08-18 05:58:55.061936 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="audit"}

      ,\nentry with timestamp 2021-08-18 05:58:55.061936 +0000 UTC ignored, reason: 'entry out of order' for stream:
      
{fluentd_thread=\"flush_thread_0\", log_type=\"audit\"},\nentry with timestamp 2021-08-18 06:01:18.290229 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="audit"}

      ,\nentry with timestamp 2021-08-18 06:01:18.290229 +0000 UTC ignored, reason: 'entry out of order' for stream:
      
{fluentd_thread=\"flush_thread_0\", log_type=\"audit\"},\nentry with timestamp 2021-08-18 06:01:26.772308 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="audit"}

      ,\nentry with timestamp 2021-08-18 06:01:26.772308 +0000 UTC ignored, reason: 'entry out of order' for stream:
      
{fluentd_thread=\"flush_thread_0\", log_type=\"audit\"},\nentry with timestamp 2021-08-18 06:06:41.045394 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="audit"}

      ,\nentry with timestamp 2021-08-18 06:06:41.045394 +0000 UTC ignored, reason: 'entry out of order' for stream:
      
{fluentd_thread=\"flush_thread_0\", log_type=\"audit\"},\nentry with timestamp 2021-08-18 06:06:41.069429 +0000 UTC ignored, reason: 'entry out of order' for stream: {fluentd_thread="flush_thread_0", log_type="audit"}

      ,\nentry with timestamp 2021-08-18 06:06:41.069429 +0000 UTC ignored, reason: 'entry out of order' for stream:
      
{fluentd_thread=\"flush_thread_0\", log_type=\"audit\"}

      ,\ntotal ignored: 14 out of 38" msg="gRPC\n"
      

      

      

      

       
      


      Expected result:
      
 The audit logs can be sent to Loki
      
            
      

      

          


          
    
          
    
          
    
          
    
          
    
          
    
          
    
          

          


          

            


            

              








              
                        

              
    
              
        
    
              
    
              
        

            
            



    
    rdlugyhe
            Rolfe Dlugy-Hegwer
            
        
    
            
              

                                              

              
    
              
        
    
              
    
              
        

            
            



    
    rdlugyhe
            Rolfe Dlugy-Hegwer
            
        
    
    
              

                                                                                                      
              
    
              
                        
              
        
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                    Updated:
            
                
    
                
        
                                                                                                                                 
    
                

                
            
                
    
                
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