How to centralized log file on docker container?
This log file is not in /var/lib/docker/container/*/
This log file is like catalina.out or another log file in container. (this file can be stdout/err or not).
Many solution is almost about stdout/err( /var/lib/docker/container/* ).
But I want to centralized log file in container to use ELK or Fluentd.
Help me please.
You could use a forwarder container inside your pod and share a volume for the log directory, as follows:
kind: ReplicationController
apiVersion: v1
metadata:
name: tomcat
labels:
app: tomcat
spec:
replicas: 1
template:
metadata:
labels:
app: tomcat
spec:
containers:
- name: tomcat
image: tomcat
volumeMounts:
- name: tomcat-logs
mountPath: /tomcat/log
readOnly: false
- name: logstash-forwarder
image: apopelo/logstash-forwarder
volumeMounts:
- name: tomcat-logs
mountPath: /var/log/tomcat
readOnly: true
volumes:
- name: tomcat-logs
emptyDir: {}The tomcat container runs the app, while logstash-forwarder forwards tomcat logs.