Hi,
In fact, after some research of my own, I have resolved the concern in question. As you specify in your answer, the original problem is related to the (non-permitted) sharing of the /var/lib/filebeat-data directory.
So here are the changes made in the two filebeat files. With this, I have two Filebeat components that work in separate namespaces (one harvests Nginx logs and the other harvests Apache logs). See the added and modified lines below.
filebeat.yaml (namespace_a):
---
apiVersion: v1
kind: ConfigMap
metadata:
name: filebeat-config
namespace: nsa
labels:
k8s-app: filebeat
data:
filebeat.yml: |-
tags: ["nsa"]
path.data: ${path.home}/data-a ### <<=== Added line
filebeat.config:
modules:
path: ${path.config}/modules.d/*.yml
reload.enabled: false
filebeat.autodiscover:
providers:
- type: kubernetes
host: ${NODE_NAME}
hints.enabled: true
templates:
- conditions.and:
- contains.kubernetes.container.image: nginx
- equals.kubernetes.namespace: nsa
config:
- module: nginx
access:
enabled: true
var.paths: ["/usr/share/filebeat/nginxlogs/access.log"]
error:
enabled: true
var.paths: ["/usr/share/filebeat/nginxlogs/error.log"]
processors:
- add_cloud_metadata:
- add_host_metadata:
- add_docker_metadata:
output.logstash:
hosts: ["logstash-nsa:5044"]
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: filebeat
namespace: nsa
labels:
k8s-app: filebeat
spec:
selector:
matchLabels:
k8s-app: filebeat
template:
metadata:
labels:
k8s-app: filebeat
spec:
serviceAccountName: filebeat
terminationGracePeriodSeconds: 30
hostNetwork: true
dnsPolicy: ClusterFirstWithHostNet
containers:
- name: filebeat
image: docker.elastic.co/beats/filebeat:7.8.0
args: [
"-c", "/etc/filebeat.yml",
"-e",
]
env:
- name: ELASTICSEARCH_HOST
value: elasticsearch-es-http.esk
- name: ELASTICSEARCH_PORT
value: "9200"
- name: ELASTICSEARCH_USERNAME
value: elastic
- name: ELASTICSEARCH_PASSWORD
valueFrom:
secretKeyRef:
key: elastic
name: elasticsearch-es-elastic-user
- name: NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
securityContext:
runAsUser: 0
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 100Mi
volumeMounts:
- name: config
mountPath: /etc/filebeat.yml
subPath: filebeat.yml
readOnly: true
- name: data
mountPath: /usr/share/filebeat/data-a ### <<=== Modified line
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
readOnly: true
- name: varlog
mountPath: /var/log
readOnly: true
- name: es-certs
mountPath: /mnt/elastic/tls.crt
readOnly: true
subPath: tls.crt
- name: nginxlogs
mountPath: /usr/share/filebeat/nginxlogs
volumes:
- name: config
configMap:
defaultMode: 0600
name: filebeat-config
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
- name: varlog
hostPath:
path: /var/log
- name: data
hostPath:
path: /var/lib/filebeat-data-a ### <<=== Modified line
type: DirectoryOrCreate
- name: es-certs
secret:
secretName: elasticsearch-es-http-certs-public
- name: nginxlogs
hostPath:
path: /c/nsa/nginx-data
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: filebeat
subjects:
- kind: ServiceAccount
name: filebeat
namespace: nsa
roleRef:
kind: ClusterRole
name: filebeat
apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: filebeat
labels:
k8s-app: filebeat
rules:
- apiGroups: [""]
resources:
- namespaces
- pods
verbs:
- get
- watch
- list
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: filebeat
namespace: nsa
labels:
k8s-app: filebeat
filebeat.yaml (namespace_b):
---
apiVersion: v1
kind: ConfigMap
metadata:
name: filebeat-config
namespace: nsb
labels:
k8s-app: filebeat
data:
filebeat.yml: |-
tags: ["nsb"]
path.data: ${path.home}/data-b ### <<=== Added line
filebeat.config:
modules:
path: ${path.config}/modules.d/*.yml
reload.enabled: false
filebeat.autodiscover:
providers:
- type: kubernetes
host: ${NODE_NAME}
hints.enabled: true
templates:
- conditions.and:
- contains.kubernetes.container.image: httpd
- equals.kubernetes.namespace: nsb
config:
- module: apache2
access:
input:
type: docker
containers.ids:
- ${data.kubernetes.container.id}
error:
input:
type: docker
containers.ids:
- ${data.kubernetes.container.id}
processors:
- add_cloud_metadata:
- add_host_metadata:
- add_docker_metadata:
output.logstash:
hosts: ["logstash-nsb:5044"]
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: filebeat
namespace: nsb
labels:
k8s-app: filebeat
spec:
selector:
matchLabels:
k8s-app: filebeat
template:
metadata:
labels:
k8s-app: filebeat
spec:
serviceAccountName: filebeat
terminationGracePeriodSeconds: 30
hostNetwork: true
dnsPolicy: ClusterFirstWithHostNet
containers:
- name: filebeat
image: docker.elastic.co/beats/filebeat:7.8.0
args: [
"-c", "/etc/filebeat.yml",
"-e",
]
env:
- name: ELASTICSEARCH_HOST
value: elasticsearch-es-http.esk
- name: ELASTICSEARCH_PORT
value: "9200"
- name: ELASTICSEARCH_USERNAME
value: elastic
- name: ELASTICSEARCH_PASSWORD
valueFrom:
secretKeyRef:
key: elastic
name: elasticsearch-es-elastic-user
- name: NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
securityContext:
runAsUser: 0
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 100Mi
volumeMounts:
- name: config
mountPath: /etc/filebeat.yml
subPath: filebeat.yml
readOnly: true
- name: data
mountPath: /usr/share/filebeat/data-b ### <<=== Modified line
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
readOnly: true
- name: varlog
mountPath: /var/log
readOnly: true
- name: es-certs
mountPath: /mnt/elastic/tls.crt
readOnly: true
subPath: tls.crt
volumes:
- name: config
configMap:
defaultMode: 0600
name: filebeat-config
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
- name: varlog
hostPath:
path: /var/log
- name: data
hostPath:
path: /var/lib/filebeat-data-b ### <<=== Modified line
type: DirectoryOrCreate
- name: es-certs
secret:
secretName: elasticsearch-es-http-certs-public
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: filebeat
subjects:
- kind: ServiceAccount
name: filebeat
namespace: nsb
roleRef:
kind: ClusterRole
name: filebeat
apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: filebeat
labels:
k8s-app: filebeat
rules:
- apiGroups: [""]
resources:
- namespaces
- pods
verbs:
- get
- watch
- list
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: filebeat
namespace: nsb
labels:
k8s-app: filebeat
---
Thank you again for your response!
Guillaume.