Merge pull request #1517 from seungkyua/apply_efk_rabc_and_fluentd_configmap

Apply RBAC to efk and create fluentd.conf

roles/kubernetes-apps/efk/elasticsearch/tasks/main.yml

 ---
+- name: "ElasticSearch | Write efk manifests (RBAC)"
+  template:
+    src: "{{ item }}"
+    dest: "{{ kube_config_dir }}/{{ item }}"
+  with_items:
+    - "efk-sa.yml"
+    - "efk-clusterrolebinding.yml"
+  run_once: true
+  when: rbac_enabled
+
+- name: "ElasticSearch | Create Serviceaccount and Clusterrolebinding (RBAC)"
+  command: "kubectl apply -f {{ kube_config_dir }}/{{ item }} -n {{ system_namespace }}"
+  with_items:
+    - "efk-sa.yml"
+    - "efk-clusterrolebinding.yml"
+  run_once: true
+  when: rbac_enabled
+
 - name: "ElasticSearch | Write ES deployment"
-  template: 
+  template:
     src: elasticsearch-deployment.yml.j2
     dest: "{{ kube_config_dir }}/elasticsearch-deployment.yaml"
   register: es_deployment_manifest
 
 - name: "ElasticSearch | Create ES deployment"
-  kube:
-    filename: "{{kube_config_dir}}/elasticsearch-deployment.yaml"
-    kubectl: "{{bin_dir}}/kubectl"
-    name: "elasticsearch-logging-v1"
-    namespace: "{{system_namespace}}"
-    resource: "rc"
-    state: "{{ item | ternary('latest','present') }}"
-  with_items: "{{ es_deployment_manifest.changed }}"
+  command: "{{ bin_dir }}/kubectl apply -f {{ kube_config_dir }}/elasticsearch-deployment.yaml -n {{ system_namespace }}"
   run_once: true
+  when: es_deployment_manifest.changed
 
 - name: "ElasticSearch | Write ES service "
-  template: 
+  template:
     src: elasticsearch-service.yml.j2
     dest: "{{ kube_config_dir }}/elasticsearch-service.yaml"
   register: es_service_manifest
 
 - name: "ElasticSearch | Create ES service"
-  kube:
-    filename: "{{kube_config_dir}}/elasticsearch-service.yaml"
-    kubectl: "{{bin_dir}}/kubectl"
-    name: "elasticsearch-logging"
-    namespace: "{{system_namespace}}"
-    resource: "svc"
-    state: "{{ item | ternary('latest','present') }}"
-  with_items: "{{ es_service_manifest.changed }}"
+  command: "{{ bin_dir }}/kubectl apply -f {{ kube_config_dir }}/elasticsearch-service.yaml -n {{ system_namespace }}"
   run_once: true
+  when: es_service_manifest.changed
+

roles/kubernetes-apps/efk/elasticsearch/templates/efk-clusterrolebinding.yml

+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: efk
+  namespace: {{ system_namespace }}
+subjects:
+  - kind: ServiceAccount
+    name: efk
+    namespace: {{ system_namespace }}
+roleRef:
+  kind: ClusterRole
+  name: cluster-admin
+  apiGroup: rbac.authorization.k8s.io

roles/kubernetes-apps/efk/elasticsearch/templates/efk-sa.yml

+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: efk
+  namespace: {{ system_namespace }}
+  labels:
+    kubernetes.io/cluster-service: "true"

roles/kubernetes-apps/efk/elasticsearch/templates/elasticsearch-deployment.yml.j2

 ---
 # https://raw.githubusercontent.com/kubernetes/kubernetes/v1.5.2/cluster/addons/fluentd-elasticsearch/es-controller.yaml
-apiVersion: v1
-kind: ReplicationController
+apiVersion: extensions/v1beta1
+kind: Deployment
 metadata:
   name: elasticsearch-logging-v1
   namespace: "{{ system_namespace }}"
@@ -12,8 +12,9 @@ metadata:
 spec:
   replicas: 2
   selector:
-    k8s-app: elasticsearch-logging
-    version: "{{ elasticsearch_image_tag }}"
+    matchLabels:
+      k8s-app: elasticsearch-logging
+      version: "{{ elasticsearch_image_tag }}"
   template:
     metadata:
       labels:
@@ -49,3 +50,7 @@ spec:
       volumes:
       - name: es-persistent-storage
         emptyDir: {}
+{% if rbac_enabled %}
+      serviceAccountName: efk 
+{% endif %}
+

roles/kubernetes-apps/efk/fluentd/defaults/main.yml

@@ -3,3 +3,5 @@ fluentd_cpu_limit: 0m
 fluentd_mem_limit: 200Mi
 fluentd_cpu_requests: 100m
 fluentd_mem_requests: 200Mi
+fluentd_config_dir: /etc/kubernetes/fluentd
+fluentd_config_file: fluentd.conf

roles/kubernetes-apps/efk/fluentd/tasks/main.yml

 ---
+- name: "Fluentd | copy config file"
+  template:
+    src: fluentd-config.yml.j2
+    dest: "{{ kube_config_dir }}/fluentd-config.yaml"
+  register: fluentd_config
+
+- name: "Fluentd | create configMap"
+  command: "{{bin_dir}}/kubectl apply -f {{ kube_config_dir }}/fluentd-config.yaml"
+  run_once: true
+  when: fluentd_config.changed
+
 - name: "Fluentd | Write fluentd daemonset"
   template:
     src: fluentd-ds.yml.j2
     dest: "{{ kube_config_dir }}/fluentd-ds.yaml"
   register: fluentd_ds_manifest
 
-#FIXME: remove if kubernetes/features#124 is implemented
-- name: "Fluentd | Purge old fluentd daemonset"
-  kube:
-    filename: "{{kube_config_dir}}/fluentd-ds.yaml"
-    kubectl: "{{bin_dir}}/kubectl"
-    name: "fluentd-es-v{{ fluentd_version }}"
-    namespace: "{{system_namespace}}"
-    resource: "ds"
-    state: absent
-  when: inventory_hostname == groups['kube-master'][0] and fluentd_ds_manifest.changed
-
 - name: "Fluentd | Create fluentd daemonset"
-  kube:
-    filename: "{{kube_config_dir}}/fluentd-ds.yaml"
-    kubectl: "{{bin_dir}}/kubectl"
-    name: "fluentd-es-v{{ fluentd_version }}"
-    namespace: "{{system_namespace}}"
-    resource: "ds"
-    state: "{{ item | ternary('latest','present') }}"
-  with_items: "{{ fluentd_ds_manifest.changed }}"
+  command: "{{ bin_dir }}/kubectl apply -f {{ kube_config_dir }}/fluentd-ds.yaml -n {{ system_namespace }}"
   run_once: true
+  when: fluentd_ds_manifest.changed
+

roles/kubernetes-apps/efk/fluentd/templates/fluentd-config.yml.j2

+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: fluentd-config
+  namespace: "{{ system_namespace }}"
+data:
+  {{ fluentd_config_file }}: |
+    # This configuration file for Fluentd / td-agent is used
+    # to watch changes to Docker log files. The kubelet creates symlinks that
+    # capture the pod name, namespace, container name & Docker container ID
+    # to the docker logs for pods in the /var/log/containers directory on the host.
+    # If running this fluentd configuration in a Docker container, the /var/log
+    # directory should be mounted in the container.
+    #
+    # These logs are then submitted to Elasticsearch which assumes the
+    # installation of the fluent-plugin-elasticsearch & the
+    # fluent-plugin-kubernetes_metadata_filter plugins.
+    # See https://github.com/uken/fluent-plugin-elasticsearch &
+    # https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter for
+    # more information about the plugins.
+    # Maintainer: Jimmi Dyson <jimmidyson@gmail.com>
+    #
+    # Example
+    # =======
+    # A line in the Docker log file might look like this JSON:
+    #
+    # {"log":"2014/09/25 21:15:03 Got request with path wombat\n",
+    #  "stream":"stderr",
+    #   "time":"2014-09-25T21:15:03.499185026Z"}
+    #
+    # The time_format specification below makes sure we properly
+    # parse the time format produced by Docker. This will be
+    # submitted to Elasticsearch and should appear like:
+    # $ curl 'http://elasticsearch-logging:9200/_search?pretty'
+    # ...
+    # {
+    #      "_index" : "logstash-2014.09.25",
+    #      "_type" : "fluentd",
+    #      "_id" : "VBrbor2QTuGpsQyTCdfzqA",
+    #      "_score" : 1.0,
+    #      "_source":{"log":"2014/09/25 22:45:50 Got request with path wombat\n",
+    #                 "stream":"stderr","tag":"docker.container.all",
+    #                 "@timestamp":"2014-09-25T22:45:50+00:00"}
+    #    },
+    # ...
+    #
+    # The Kubernetes fluentd plugin is used to write the Kubernetes metadata to the log
+    # record & add labels to the log record if properly configured. This enables users
+    # to filter & search logs on any metadata.
+    # For example a Docker container's logs might be in the directory:
+    #
+    #  /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b
+    #
+    # and in the file:
+    #
+    #  997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
+    #
+    # where 997599971ee6... is the Docker ID of the running container.
+    # The Kubernetes kubelet makes a symbolic link to this file on the host machine
+    # in the /var/log/containers directory which includes the pod name and the Kubernetes
+    # container name:
+    #
+    #    synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
+    #    ->
+    #    /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
+    #
+    # The /var/log directory on the host is mapped to the /var/log directory in the container
+    # running this instance of Fluentd and we end up collecting the file:
+    #
+    #   /var/log/containers/synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
+    #
+    # This results in the tag:
+    #
+    #  var.log.containers.synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
+    #
+    # The Kubernetes fluentd plugin is used to extract the namespace, pod name & container name
+    # which are added to the log message as a kubernetes field object & the Docker container ID
+    # is also added under the docker field object.
+    # The final tag is:
+    #
+    #   kubernetes.var.log.containers.synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
+    #
+    # And the final log record look like:
+    #
+    # {
+    #   "log":"2014/09/25 21:15:03 Got request with path wombat\n",
+    #   "stream":"stderr",
+    #   "time":"2014-09-25T21:15:03.499185026Z",
+    #   "kubernetes": {
+    #     "namespace": "default",
+    #     "pod_name": "synthetic-logger-0.25lps-pod",
+    #     "container_name": "synth-lgr"
+    #   },
+    #   "docker": {
+    #     "container_id": "997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b"
+    #   }
+    # }
+    #
+    # This makes it easier for users to search for logs by pod name or by
+    # the name of the Kubernetes container regardless of how many times the
+    # Kubernetes pod has been restarted (resulting in a several Docker container IDs).
+    #
+    # TODO: Propagate the labels associated with a container along with its logs
+    # so users can query logs using labels as well as or instead of the pod name
+    # and container name. This is simply done via configuration of the Kubernetes
+    # fluentd plugin but requires secrets to be enabled in the fluent pod. This is a
+    # problem yet to be solved as secrets are not usable in static pods which the fluentd
+    # pod must be until a per-node controller is available in Kubernetes.
+    # Prevent fluentd from handling records containing its own logs. Otherwise
+    # it can lead to an infinite loop, when error in sending one message generates
+    # another message which also fails to be sent and so on.
+    <match fluent.**>
+      type null
+    </match>
+    # Example:
+    # {"log":"[info:2016-02-16T16:04:05.930-08:00] Some log text here\n","stream":"stdout","time":"2016-02-17T00:04:05.931087621Z"}
+    <source>
+      type tail
+      path /var/log/containers/*.log
+      pos_file /var/log/es-containers.log.pos
+      time_format %Y-%m-%dT%H:%M:%S.%NZ
+      tag kubernetes.*
+      format json
+      read_from_head true
+    </source>
+    # Example:
+    # 2015-12-21 23:17:22,066 [salt.state       ][INFO    ] Completed state [net.ipv4.ip_forward] at time 23:17:22.066081
+    <source>
+      type tail
+      format /^(?<time>[^ ]* [^ ,]*)[^\[]*\[[^\]]*\]\[(?<severity>[^ \]]*) *\] (?<message>.*)$/
+      time_format %Y-%m-%d %H:%M:%S
+      path /var/log/salt/minion
+      pos_file /var/log/es-salt.pos
+      tag salt
+    </source>
+    # Example:
+    # Dec 21 23:17:22 gke-foo-1-1-4b5cbd14-node-4eoj startupscript: Finished running startup script /var/run/google.startup.script
+    <source>
+      type tail
+      format syslog
+      path /var/log/startupscript.log
+      pos_file /var/log/es-startupscript.log.pos
+      tag startupscript
+    </source>
+    # Examples:
+    # time="2016-02-04T06:51:03.053580605Z" level=info msg="GET /containers/json"
+    # time="2016-02-04T07:53:57.505612354Z" level=error msg="HTTP Error" err="No such image: -f" statusCode=404
+    <source>
+      type tail
+      format /^time="(?<time>[^)]*)" level=(?<severity>[^ ]*) msg="(?<message>[^"]*)"( err="(?<error>[^"]*)")?( statusCode=($<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>
+      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>
+      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>
+      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>
+      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>
+      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>
+      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:
+    # I1104 10:36:20.242766       5 rescheduler.go:73] Running Rescheduler
+    <source>
+      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/rescheduler.log
+      pos_file /var/log/es-rescheduler.log.pos
+      tag rescheduler
+    </source>
+    # Example:
+    # I0603 15:31:05.793605       6 cluster_manager.go:230] Reading config from path /etc/gce.conf
+    <source>
+      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>
+      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>
+    <filter kubernetes.**>
+      type kubernetes_metadata
+    </filter>
+    ## Prometheus Exporter Plugin
+    ## input plugin that exports metrics
+    #<source>
+    #  type prometheus
+    #</source>
+    #<source>
+    #  type monitor_agent
+    #</source>
+    #<source>
+    #  type forward
+    #</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>
+    <match **>
+       type elasticsearch
+       user "#{ENV['FLUENT_ELASTICSEARCH_USER']}"
+       password "#{ENV['FLUENT_ELASTICSEARCH_PASSWORD']}"
+       log_level info
+       include_tag_key true
+       host elasticsearch-logging
+       port 9200
+       logstash_format true
+       # Set the chunk limit the same as for fluentd-gcp.
+       buffer_chunk_limit 2M
+       # Cap buffer memory usage to 2MiB/chunk * 32 chunks = 64 MiB
+       buffer_queue_limit 32
+       flush_interval 5s
+       # Never wait longer than 5 minutes between retries.
+       max_retry_wait 30
+       # Disable the limit on the number of retries (retry forever).
+       disable_retry_limit
+       # Use multiple threads for processing.
+       num_threads 8
+    </match>

roles/kubernetes-apps/efk/fluentd/templates/fluentd-ds.yml.j2

@@ -23,7 +23,7 @@ spec:
         command:
           - '/bin/sh'
           - '-c'
-          - '/usr/sbin/td-agent 2>&1 >> /var/log/fluentd.log'
+          - '/usr/sbin/td-agent -c {{ fluentd_config_dir }}/{{ fluentd_config_file}} 2>&1 >> /var/log/fluentd.log'
         resources:
           limits:
 {% if fluentd_cpu_limit is defined and fluentd_cpu_limit != "0m" %}
@@ -39,6 +39,8 @@ spec:
         - name: varlibdockercontainers
           mountPath: /var/lib/docker/containers
           readOnly: true
+        - name: config
+          mountPath: "{{ fluentd_config_dir }}"
       terminationGracePeriodSeconds: 30
       volumes:
       - name: varlog
@@ -47,3 +49,10 @@ spec:
       - name: varlibdockercontainers
         hostPath:
           path: /var/lib/docker/containers
+      - name: config
+        configMap: 
+          name: fluentd-config
+{% if rbac_enabled %}
+      serviceAccountName: efk 
+{% endif %}
+

roles/kubernetes-apps/efk/kibana/templates/kibana-deployment.yml.j2

@@ -44,3 +44,7 @@ spec:
         - containerPort: 5601
           name: ui
           protocol: TCP
+{% if rbac_enabled %}
+      serviceAccountName: efk 
+{% endif %}
+