もっとkubernetesと仲良くなりたい今日この頃です。
ログの管理をkibanaで行いたいとおもい色々とやっていましたが、
なかなか手こずったのでこちらに記載しておきます。
cluster-admin権限をつける
$ kubectl create clusterrolebinding owner-cluster-admin-binding \
--clusterrole cluster-admin \
--user [gcpの権限を持っているメールアドレス]
owner-cluster-admin-binding任意です。
このcluster-adminを付けないで今後の作業をしようとすると
Error from server (Forbidden): error when creating "fluentd-deamonset.yml": clusterroles.rbac.authorization.k8s.io "fluentd-es" is forbidden: attempt to grant extra privileges
このようなエラーで弾かれてしまいます
IAMに権限がないと作成ができないかと思います。
elasticsearchの作成
elasticsearch.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: elasticsearch-pvc
namespace: default
labels:
kubernetes.io/cluster-service: "true"
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
---
apiVersion: v1
kind: Service
metadata:
name: elasticsearch
namespace: default
spec:
selector:
app: elasticsearch
ports:
- protocol: TCP
port: 9200
targetPort: http
type: "LoadBalancer"
loadBalancerIP: ""
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: elasticsearch
namespace: default
labels:
app: elasticsearch
spec:
replicas: 1
selector:
matchLabels:
app: elasticsearch
template:
metadata:
labels:
app: elasticsearch
spec:
containers:
- name: elasticsearch
image: elasticsearch:5.6-alpine
ports:
- containerPort: 9200
name: http
volumeMounts:
- mountPath: /data
name: elasticsearch-pvc
- mountPath: /usr/share/elasticsearch/config
name: elasticsearch-config
resources:
requests:
memory: "512Mi"
cpu: "500m"
limits:
memory: "1024Mi"
cpu: "750m"
volumes:
- name: elasticsearch-pvc
persistentVolumeClaim:
claimName: elasticsearch-pvc
- name: elasticsearch-config
configMap:
name: elasticsearch-config
---
kind: ConfigMap
apiVersion: v1
metadata:
name: elasticsearch-config
namespace: default
data:
elasticsearch.yml: |-
http.host: 0.0.0.0
path.scripts: /tmp/scripts
log4j2.properties: |-
status = error
appender.console.type = Console
appender.console.name = console
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = [%d{ISO8601}][%-5p][%-25c{1.}] %marker%m%n
rootLogger.level = info
rootLogger.appenderRef.console.ref = console
jvm.options: |-
-Xms512m
-Xmx1024m
-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly
-XX:+AlwaysPreTouch
-server
-Xss1m
-Djava.awt.headless=true
-Dfile.encoding=UTF-8
-Djna.nosys=true
-Djdk.io.permissionsUseCanonicalPath=true
-Dio.netty.noUnsafe=true
-Dio.netty.noKeySetOptimization=true
-Dio.netty.recycler.maxCapacityPerThread=0
-Dlog4j.shutdownHookEnabled=false
-Dlog4j2.disable.jmx=true
-Dlog4j.skipJansi=true
-XX:+HeapDumpOnOutOfMemoryError
もしもこんなエラーが出た場合
Exception in thread "main" org.elasticsearch.bootstrap.BootstrapException: java.nio.file.AccessDeniedException: /etc/elasticsearch/elasticsearch.keystore
ファイル権限がおかしいのかと思い色々としらべましたが、そうではなくノードのメモリが足りない事が原因でした。
現在ノードプールのスペックをCUP:4 Mem:15Gのインスタンスに変更した所問題なく稼働しています。
Elasticsearchは800Mほどメモリを食うのそれ以上に要求されても問題ないスペックにしておきましょう。
podの要求するメモリがノードに足りな場合はOOMKillerでpodが殺されてしまい、
起動を繰り返します
IPの確認をしておく
>>> get services elasticsearch
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
elasticsearch LoadBalancer *.*.*.* 35.**.**.** 9200:32619/TCP 34m
EXTERNAL-IPはメモっておきます
fluentdの作成
Configmapの作成
fluentd-configmap.yml
kind: ConfigMap
apiVersion: v1
metadata:
name: fluentd-es-config-v0.1.5
namespace: default
labels:
addonmanager.kubernetes.io/mode: Reconcile
data:
system.conf: |-
<system>
root_dir /tmp/fluentd-buffers/
</system>
containers.input.conf: |-
<source>
@id fluentd-containers.log
@type tail
path /var/log/containers/*.log
pos_file /var/log/es-containers.log.pos
tag raw.kubernetes.*
read_from_head true
<parse>
@type multi_format
<pattern>
format json
time_key time
time_format %Y-%m-%dT%H:%M:%S.%NZ
</pattern>
<pattern>
format /^(?<time>.+) (?<stream>stdout|stderr) [^ ]* (?<log>.*)$/
time_format %Y-%m-%dT%H:%M:%S.%N%:z
</pattern>
</parse>
</source>
# Detect exceptions in the log output and forward them as one log entry.
<match raw.kubernetes.**>
@id raw.kubernetes
@type detect_exceptions
remove_tag_prefix raw
message log
stream stream
multiline_flush_interval 5
max_bytes 500000
max_lines 1000
</match>
system.input.conf: |-
# Example:
# 2015-12-21 23:17:22,066 [salt.state ][INFO ] Completed state [net.ipv4.ip_forward] at time 23:17:22.066081
<source>
@id minion
@type tail
format /^(?<time>[^ ]* [^ ,]*)[^\[]*\[[^\]]*\]\[(?<severity>[^ \]]*) *\] (?<message>.*)$/
time_format %Y-%m-%d %H:%M:%S
path /var/log/salt/minion
pos_file /var/log/salt.pos
tag salt
</source>
# Example:
# Dec 21 23:17:22 gke-foo-1-1-4b5cbd14-node-4eoj startupscript: Finished running startup script /var/run/google.startup.script
<source>
@id startupscript.log
@type tail
format syslog
path /var/log/startupscript.log
pos_file /var/log/es-startupscript.log.pos
tag startupscript
</source>
# Examples:
# time="2016-02-04T06:51:03.053580605Z" level=info msg="GET /containers/json"
# time="2016-02-04T07:53:57.505612354Z" level=error msg="HTTP Error" err="No such image: -f" statusCode=404
# TODO(random-liu): Remove this after cri container runtime rolls out.
<source>
@id docker.log
@type tail
format /^time="(?<time>[^)]*)" level=(?<severity>[^ ]*) msg="(?<message>[^"]*)"( err="(?<error>[^"]*)")?( statusCode=($<status_code>\d+))?/
path /var/log/docker.log
pos_file /var/log/es-docker.log.pos
tag docker
</source>
# Example:
# 2016/02/04 06:52:38 filePurge: successfully removed file /var/etcd/data/member/wal/00000000000006d0-00000000010a23d1.wal
<source>
@id etcd.log
@type tail
# Not parsing this, because it doesn't have anything particularly useful to
# parse out of it (like severities).
format none
path /var/log/etcd.log
pos_file /var/log/es-etcd.log.pos
tag etcd
</source>
# Multi-line parsing is required for all the kube logs because very large log
# statements, such as those that include entire object bodies, get split into
# multiple lines by glog.
# Example:
# I0204 07:32:30.020537 3368 server.go:1048] POST /stats/container/: (13.972191ms) 200 [[Go-http-client/1.1] 10.244.1.3:40537]
<source>
@id kubelet.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/kubelet.log
pos_file /var/log/es-kubelet.log.pos
tag kubelet
</source>
# Example:
# I1118 21:26:53.975789 6 proxier.go:1096] Port "nodePort for kube-system/default-http-backend:http" (:31429/tcp) was open before and is still needed
<source>
@id kube-proxy.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/kube-proxy.log
pos_file /var/log/es-kube-proxy.log.pos
tag kube-proxy
</source>
# Example:
# I0204 07:00:19.604280 5 handlers.go:131] GET /api/v1/nodes: (1.624207ms) 200 [[kube-controller-manager/v1.1.3 (linux/amd64) kubernetes/6a81b50] 127.0.0.1:38266]
<source>
@id kube-apiserver.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/kube-apiserver.log
pos_file /var/log/es-kube-apiserver.log.pos
tag kube-apiserver
</source>
# Example:
# I0204 06:55:31.872680 5 servicecontroller.go:277] LB already exists and doesn't need update for service kube-system/kube-ui
<source>
@id kube-controller-manager.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/kube-controller-manager.log
pos_file /var/log/es-kube-controller-manager.log.pos
tag kube-controller-manager
</source>
# Example:
# W0204 06:49:18.239674 7 reflector.go:245] pkg/scheduler/factory/factory.go:193: watch of *api.Service ended with: 401: The event in requested index is outdated and cleared (the requested history has been cleared [2578313/2577886]) [2579312]
<source>
@id kube-scheduler.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/kube-scheduler.log
pos_file /var/log/es-kube-scheduler.log.pos
tag kube-scheduler
</source>
# Example:
# I0603 15:31:05.793605 6 cluster_manager.go:230] Reading config from path /etc/gce.conf
<source>
@id glbc.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/glbc.log
pos_file /var/log/es-glbc.log.pos
tag glbc
</source>
# Example:
# I0603 15:31:05.793605 6 cluster_manager.go:230] Reading config from path /etc/gce.conf
<source>
@id cluster-autoscaler.log
@type tail
format multiline
multiline_flush_interval 5s
format_firstline /^\w\d{4}/
format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
time_format %m%d %H:%M:%S.%N
path /var/log/cluster-autoscaler.log
pos_file /var/log/es-cluster-autoscaler.log.pos
tag cluster-autoscaler
</source>
# Logs from systemd-journal for interesting services.
# TODO(random-liu): Remove this after cri container runtime rolls out.
<source>
@id journald-docker
@type systemd
matches [{ "_SYSTEMD_UNIT": "docker.service" }]
<storage>
@type local
persistent true
path /var/log/journald-docker.pos
</storage>
read_from_head true
tag docker
</source>
<source>
@id journald-container-runtime
@type systemd
matches [{ "_SYSTEMD_UNIT": "{{ container_runtime }}.service" }]
<storage>
@type local
persistent true
path /var/log/journald-container-runtime.pos
</storage>
read_from_head true
tag container-runtime
</source>
<source>
@id journald-kubelet
@type systemd
matches [{ "_SYSTEMD_UNIT": "kubelet.service" }]
<storage>
@type local
persistent true
path /var/log/journald-kubelet.pos
</storage>
read_from_head true
tag kubelet
</source>
<source>
@id journald-node-problem-detector
@type systemd
matches [{ "_SYSTEMD_UNIT": "node-problem-detector.service" }]
<storage>
@type local
persistent true
path /var/log/journald-node-problem-detector.pos
</storage>
read_from_head true
tag node-problem-detector
</source>
<source>
@id kernel
@type systemd
matches [{ "_TRANSPORT": "kernel" }]
<storage>
@type local
persistent true
path /var/log/kernel.pos
</storage>
<entry>
fields_strip_underscores true
fields_lowercase true
</entry>
read_from_head true
tag kernel
</source>
forward.input.conf: |-
# Takes the messages sent over TCP
<source>
@type forward
</source>
monitoring.conf: |-
# Prometheus Exporter Plugin
# input plugin that exports metrics
<source>
@type prometheus
</source>
<source>
@type monitor_agent
</source>
# input plugin that collects metrics from MonitorAgent
<source>
@type prometheus_monitor
<labels>
host ${hostname}
</labels>
</source>
# input plugin that collects metrics for output plugin
<source>
@type prometheus_output_monitor
<labels>
host ${hostname}
</labels>
</source>
# input plugin that collects metrics for in_tail plugin
<source>
@type prometheus_tail_monitor
<labels>
host ${hostname}
</labels>
</source>
output.conf: |-
# Enriches records with Kubernetes metadata
<filter kubernetes.**>
@type kubernetes_metadata
</filter>
<filter kubernetes.var.log.containers.myapp**.log>
@type parser
@id myapp_filter
key_name log
reserve_data true
remove_key_name_field true
#<parse>
# @type regexp
# expression /^(?<level>[^ ]*)[ \t]+\[(?<time>[^\]]*)\] \[(?<thread>[^\]]*)\] \[(?<request>[^\]]*)\] (?<class>[^ ]*): (?<message>.*)$/
# time_format %Y-%m-%d %H:%M:%S,%L %z
#</parse>
<parse>
@type multiline
format_firstline /^[A-Z]/
format1 /^(?<level>[^ ]*)[ \t]+\[(?<time>[^\]]*)\] \[(?<thread>[^\]]*)\] \[(?<request>[^\]]*)\] (?<class>[^ ]*): (?<message>.*)$/
time_format %Y-%m-%d %H:%M:%S,%L %z
</parse>
</filter>
<match kubelet>
@type elasticsearch_dynamic
@id kubelet_out_es
log_level info
include_tag_key true
host "#{ENV['FLUENT_ELASTICSEARCH_HOST']}"
port "#{ENV['FLUENT_ELASTICSEARCH_PORT']}"
scheme "#{ENV['FLUENT_ELASTICSEARCH_SCHEME'] || 'http'}"
ssl_verify "#{ENV['FLUENT_ELASTICSEARCH_SSL_VERIFY'] || 'true'}"
reload_connections "#{ENV['FLUENT_ELASTICSEARCH_RELOAD_CONNECTIONS'] || 'true'}"
index_name fluentd-${tag_parts[0]+ "-" + Time.at(time).getlocal("+05:30").strftime(@logstash_dateformat)}
include_timestamp true
#logstash_prefix "#{ENV['FLUENT_ELASTICSEARCH_LOGSTASH_PREFIX'] || 'logstash'}"
#logstash_format true
<buffer>
flush_thread_count 8
flush_interval 5s
chunk_limit_size 4M
queue_limit_length 32
retry_max_interval 30
retry_forever true
</buffer>
</match>
<match kube-apiserver>
@type elasticsearch_dynamic
@id apiserver_out_es
log_level info
include_tag_key true
host "#{ENV['FLUENT_ELASTICSEARCH_HOST']}"
port "#{ENV['FLUENT_ELASTICSEARCH_PORT']}"
scheme "#{ENV['FLUENT_ELASTICSEARCH_SCHEME'] || 'http'}"
ssl_verify "#{ENV['FLUENT_ELASTICSEARCH_SSL_VERIFY'] || 'true'}"
reload_connections "#{ENV['FLUENT_ELASTICSEARCH_RELOAD_CONNECTIONS'] || 'true'}"
index_name fluentd-${tag_parts[0]+ "-" + Time.at(time).getlocal("+05:30").strftime(@logstash_dateformat)}
include_timestamp true
#logstash_prefix "#{ENV['FLUENT_ELASTICSEARCH_LOGSTASH_PREFIX'] || 'logstash'}"
#logstash_format true
<buffer>
flush_thread_count 8
flush_interval 5s
chunk_limit_size 4M
queue_limit_length 32
retry_max_interval 30
retry_forever true
</buffer>
</match>
<match **>
@type copy
<store>
@type elasticsearch_dynamic
@id out_es
#log_level info
include_tag_key true
host "#{ENV['FLUENT_ELASTICSEARCH_HOST']}"
port "#{ENV['FLUENT_ELASTICSEARCH_PORT']}"
scheme "#{ENV['FLUENT_ELASTICSEARCH_SCHEME'] || 'http'}"
ssl_verify "#{ENV['FLUENT_ELASTICSEARCH_SSL_VERIFY'] || 'true'}"
reload_connections "#{ENV['FLUENT_ELASTICSEARCH_RELOAD_CONNECTIONS'] || 'true'}"
index_name fluentd-${record['kubernetes']['container_name']}-${Time.at(time).getlocal("+05:30").strftime(@logstash_dateformat)}
include_timestamp true
#logstash_prefix "#{ENV['FLUENT_ELASTICSEARCH_LOGSTASH_PREFIX'] || 'logstash'}"
#logstash_format true
<buffer>
flush_thread_count 8
flush_interval 5s
chunk_limit_size 2M
queue_limit_length 32
retry_max_interval 30
retry_forever true
</buffer>
</store>
# <store>
# @type gcs
# @id out_gcs
# project mys-gcp-project-id
# keyfile /etc/fluent/gcp-creds.json
# bucket myapp-logs
# object_key_format %{path}%{time_slice}_%{index}.%{file_extension}
# path logs/${tag}/%Y/%m/%d/
# # if you want to use ${tag} or %Y/%m/%d/ like syntax in path / object_key_format,
# # need to specify tag for ${tag} and time for %Y/%m/%d in <buffer> argument.
# <buffer tag,time>
# @type file
# path /var/log/fluent/gcs
# timekey 1h # 1 hour partition
# timekey_wait 10m
# timekey_use_utc true # use utc
# </buffer>
# <format>
# @type json
# </format>
# </store>
</match>
デーモンセットの作成
fluentd-daemonset.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: fluentd-es
namespace: default
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: fluentd-es
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
rules:
- apiGroups:
- ""
resources:
- "namespaces"
- "pods"
verbs:
- "get"
- "watch"
- "list"
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: fluentd-es
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
subjects:
- kind: ServiceAccount
name: fluentd-es
namespace: default
apiGroup: ""
roleRef:
kind: ClusterRole
name: fluentd-es
apiGroup: ""
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: fluentd-es-v2.2.0
namespace: default
labels:
k8s-app: fluentd-es
version: v2.2.0
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
selector:
matchLabels:
k8s-app: fluentd-es
version: v2.2.0
template:
metadata:
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
version: v2.2.0
# This annotation ensures that fluentd does not get evicted if the node
# supports critical pod annotation based priority scheme.
# Note that this does not guarantee admission on the nodes (#40573).
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
spec:
priorityClassName: system-node-critical
serviceAccountName: fluentd-es
containers:
- name: fluentd-es
image: k8s.gcr.io/fluentd-elasticsearch:v2.2.0
env:
- name: FLUENTD_ARGS
value: --no-supervisor -q -v
- name: FLUENT_ELASTICSEARCH_HOST
value: "[ElasticSearchのIP]"
- name: FLUENT_ELASTICSEARCH_PORT
value: "9200"
- name: FLUENT_ELASTICSEARCH_SCHEME
value: "tcp"
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 200Mi
volumeMounts:
- name: varlog
mountPath: /var/log
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
readOnly: true
- name: config-volume
mountPath: /etc/fluent/config.d
nodeSelector:
beta.kubernetes.io/fluentd-ds-ready: "true"
terminationGracePeriodSeconds: 30
imagePullSecrets:
- name: regsecret
volumes:
- name: varlog
hostPath:
path: /var/log
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
- name: config-volume
configMap:
name: fluentd-es-config-v0.1.5
ElasticSearchのIPはserviceを確認して変更してください
これでうごきましたClusterRoleBindingでエラーが出る場合は最初にやったcluster-admin権限が足りていないのだと思います。
kibanaの作成
apiVersion: v1
kind: Service
metadata:
name: kibana
namespace: default
spec:
selector:
app: kibana
ports:
- protocol: TCP
port: 5601
targetPort: http
nodePort: 30050
type: "LoadBalancer"
loadBalancerIP: ""
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: kibana
namespace: default
labels:
app: kibana
spec:
replicas: 1
selector:
matchLabels:
app: kibana
template:
metadata:
labels:
app: kibana
spec:
containers:
- name: kibana
image: kibana:5.6
ports:
- containerPort: 5601
name: http
env:
- name: ELASTICSEARCH_URL
value: "http://[ElasticSearchのIP]:9200"
確認する
>>> get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
*****-service LoadBalancer **.**.**.** **.**.**.** 80:30298/TCP 3h
*****-service LoadBalancer **.**.**.** **.**.**.** 80:30787/TCP 3h
elasticsearch LoadBalancer **.**.**.** **.**.**.** 9200:32619/TCP 41m
kibana LoadBalancer **.**.**.** **.**.**.** 5601:30050/TCP 11s
kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 3h
>>> get po
NAME READY STATUS RESTARTS AGE
****-deployment-d968474b-hzxc 2/2 Running 0 3h
****-deployment-85cb7b496-5g 2/2 Running 0 3h
elasticsearch-7d7947fd-gdg5 1/1 Running 0 41m
fluentd-es-v2.2.0-l 1/1 Running 0 4m
>>> get configmaps
NAME DATA AGE
elasticsearch-config 3 41m
fluentd-es-config-v0.1.5 6 4m
>>> get serviceaccounts
NAME SECRETS AGE
default 1 3h
fluentd-es 1 4m
>>> get persistentvolumeclaims
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
elasticsearch-pvc Bound pvc-f7201ef9-01c7-11e9-9f9a-a92018c 5Gi RWO standard 41m
>>>
まだnginxのログを整形していないのでこれから整形していきます。
マサカリなどお待ちしております。
参考
https://medium.com/@lestrrat/configuring-rbac-for-your-kubernetes-service-accounts-c348b64eb242
https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/
https://github.com/elastic/elasticsearch/issues/26410
https://github.com/fluent/fluentd-kubernetes-daemonset/issues/14