Create a DaemonSet Replica for Syslog

The logs of all NCP components can be redirected with this method. The applications need to be configured to log to stderr, which is enabled by default. The following procedure assumes that the syslog agent image is example/rsyslog.

Procedure

1. Create the DaemonSet yaml file. For example,

       apiVersion: v1
       kind: ConfigMap
       metadata:
         name: rsyslog-config
         labels:
           version: v1
       data:
         nsx-ncp.conf: |
           module(load="imfile")
       
           ruleset(name="remote") {
             if $msg contains 'nsx-container' then
               action(type="omfwd"
               Protocol="tcp"
               Target="nsx.example.com"
               Port="514")
         
               stop
             }
         
             input(type="imfile"
               File="/var/log/containers/nsx-node-agent-*.log"
               Tag="nsx-node-agent"
               Ruleset="remote")
         
             input(type="imfile"
               File="/var/log/containers/nsx-ncp-*.log"
               Tag="nsx-ncp"
               Ruleset="remote")
         
             input(type="imfile"
               File="/var/log/syslog"
               Tag="nsx-cni"
               Ruleset="remote")
       ---
       # rsyslog DaemonSet
       apiVersion: extensions/v1beta1
       kind: DaemonSet
       metadata:
         name: rsyslog
         labels:
           component: rsyslog
           version: v1
       spec:
         template:
           metadata:
             labels:
             component: rsyslog
             version: v1
       spec:
         hostNetwork: true
         containers:
         - name: rsyslog
           image: example/rsyslog
           imagePullPolicy: IfNotPresent
           volumeMounts:
           - name: rsyslog-config-volume
             mountPath: /etc/rsyslog.d
           - name: log-volume
             mountPath: /var/log
           - name: container-volume
             mountPath: /var/lib/docker/containers
         volumes:
         - name: rsyslog-config-volume
           configMap:
           name: rsyslog-config
         - name: log-volume
           hostPath:
             path: /var/log
         - name: container-volume
           hostPath:
             path: /var/lib/docker/containers

2. Create the DaemonSet.

   kubectl apply -f <daemonset yaml file>