235 lines
9.1 KiB
Smarty
235 lines
9.1 KiB
Smarty
# This configuration file for Fluentd / td-agent is used
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# to watch changes to Docker log files. The kubelet creates symlinks that
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# capture the pod name, namespace, container name & Docker container ID
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# to the docker logs for pods in the /var/log/containers directory on the host.
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# If running this fluentd configuration in a Docker container, the /var/log
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# directory should be mounted in the container.
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#
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# These logs are then submitted to Elasticsearch which assumes the
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# installation of the fluent-plugin-elasticsearch & the
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# fluent-plugin-kubernetes_metadata_filter plugins.
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# See https://github.com/uken/fluent-plugin-elasticsearch &
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# https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter for
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# more information about the plugins.
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# Maintainer: Jimmi Dyson <jimmidyson@gmail.com>
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#
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# Example
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# =======
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# A line in the Docker log file might look like this JSON:
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# {"log":"2014/09/25 21:15:03 Got request with path wombat\n",
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# "stream":"stderr",
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# "time":"2014-09-25T21:15:03.499185026Z"}
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#
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# The time_format specification below makes sure we properly
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# parse the time format produced by Docker. This will be
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# submitted to Elasticsearch and should appear like:
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# $ curl 'http://elasticsearch-logging:9200/_search?pretty'
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# ...
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# {
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# "_index" : "logstash-2014.09.25",
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# "_type" : "fluentd",
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# "_id" : "VBrbor2QTuGpsQyTCdfzqA",
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# "_score" : 1.0,
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# "_source":{"log":"2014/09/25 22:45:50 Got request with path wombat\n",
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# "stream":"stderr","tag":"docker.container.all",
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# "@timestamp":"2014-09-25T22:45:50+00:00"}
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# },
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# ...
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#
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# The Kubernetes fluentd plugin is used to write the Kubernetes metadata to the log
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# record & add labels to the log record if properly configured. This enables users
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# to filter & search logs on any metadata.
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# For example a Docker container's logs might be in the directory:
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#
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# /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b
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#
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# and in the file:
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#
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# 997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
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#
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# where 997599971ee6... is the Docker ID of the running container.
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# The Kubernetes kubelet makes a symbolic link to this file on the host machine
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# in the /var/log/containers directory which includes the pod name and the Kubernetes
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# container name:
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#
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# synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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# ->
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# /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
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#
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# The /var/log directory on the host is mapped to the /var/log directory in the container
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# running this instance of Fluentd and we end up collecting the file:
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#
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# /var/log/containers/synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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#
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# This results in the tag:
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#
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# var.log.containers.synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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#
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# The Kubernetes fluentd plugin is used to extract the namespace, pod name & container name
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# which are added to the log message as a kubernetes field object & the Docker container ID
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# is also added under the docker field object.
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# The final tag is:
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#
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# kubernetes.var.log.containers.synthetic-logger-0.25lps-pod_default_synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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#
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# And the final log record look like:
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#
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# {
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# "log":"2014/09/25 21:15:03 Got request with path wombat\n",
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# "stream":"stderr",
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# "time":"2014-09-25T21:15:03.499185026Z",
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# "kubernetes": {
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# "namespace": "default",
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# "pod_name": "synthetic-logger-0.25lps-pod",
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# "container_name": "synth-lgr"
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# },
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# "docker": {
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# "container_id": "997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b"
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# }
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# }
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#
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# This makes it easier for users to search for logs by pod name or by
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# the name of the Kubernetes container regardless of how many times the
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# Kubernetes pod has been restarted (resulting in a several Docker container IDs).
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#
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# TODO: Propagate the labels associated with a container along with its logs
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# so users can query logs using labels as well as or instead of the pod name
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# and container name. This is simply done via configuration of the Kubernetes
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# fluentd plugin but requires secrets to be enabled in the fluent pod. This is a
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# problem yet to be solved as secrets are not usable in static pods which the fluentd
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# pod must be until a per-node controller is available in Kubernetes.
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# Example:
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# {"log":"[info:2016-02-16T16:04:05.930-08:00] Some log text here\n","stream":"stdout","time":"2016-02-17T00:04:05.931087621Z"}
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<source>
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type tail
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path /var/lib/docker/containers/*/*-json.log
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pos_file fluentd-docker.pos
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time_format %Y-%m-%dT%H:%M:%S
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tag kubernetes.*
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format json
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read_from_head true
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</source>
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<filter kubernetes.**>
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type kubernetes_metadata
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</filter>
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# Examples:
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# time="2016-02-04T06:51:03.053580605Z" level=info msg="GET /containers/json"
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# time="2016-02-04T07:53:57.505612354Z" level=error msg="HTTP Error" err="No such lteimage: -f" statusCode=404
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<source>
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@type tail
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format /^time="(?<time>[^)]*)" level=(?<severity>[^ ]*) msg="(?<message>[^"]*)"( err="(?<error>[^"]*)")?( statusCode=($<status_code>\d+))?/
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path /var/log/docker.log
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pos_file /var/log/es-docker.log.pos
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tag docker
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</source>
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# Example:
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# 2016/02/04 06:52:38 filePurge: successfully removed file /var/etcd/data/member/wal/00000000000006d0-00000000010a23d1.wal
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<source>
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@type tail
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# Not parsing this, because it doesn't have anything particularly useful to
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# parse out of it (like severities).
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format none
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path /var/log/etcd.log
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pos_file /var/log/es-etcd.log.pos
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tag etcd
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</source>
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# Multi-line parsing is required for all the kube logs because very large log
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# statements, such as those that include entire object bodies, get split into
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# multiple lines by glog.
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# Example:
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# 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]
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<source>
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@type tail
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format multiline
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multiline_flush_interval 5s
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format_firstline /^\w\d{4}/
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format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
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time_format %m%d %H:%M:%S.%N
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path /var/log/kubelet.log
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pos_file /var/log/es-kubelet.log.pos
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tag kube.kubelet
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</source>
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# Example:
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# 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
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<source>
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@type tail
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format multiline
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multiline_flush_interval 5s
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format_firstline /^\w\d{4}/
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format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
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time_format %m%d %H:%M:%S.%N
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path /var/log/kube-proxy.log
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pos_file /var/log/es-kube-proxy.log.pos
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tag kube.proxy
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</source>
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# Example:
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# 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]
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<source>
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@type tail
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format multiline
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multiline_flush_interval 5s
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format_firstline /^\w\d{4}/
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format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
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time_format %m%d %H:%M:%S.%N
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path /var/log/kube-apiserver.log
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pos_file /var/log/es-kube-apiserver.log.pos
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tag kube.apiserver
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</source>
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# Example:
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# I0204 06:55:31.872680 5 servicecontroller.go:277] LB already exists and doesn't need update for service kube-system/kube-ui
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<source>
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@type tail
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format multiline
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multiline_flush_interval 5s
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format_firstline /^\w\d{4}/
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format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
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time_format %m%d %H:%M:%S.%N
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path /var/log/kube-controller-manager.log
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pos_file /var/log/es-kube-controller-manager.log.pos
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tag kube.controller.manager
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</source>
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# Example:
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# 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]
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<source>
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@type tail
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format multiline
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multiline_flush_interval 5s
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format_firstline /^\w\d{4}/
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format1 /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<message>.*)/
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time_format %m%d %H:%M:%S.%N
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path /var/log/kube-scheduler.log
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pos_file /var/log/es-kube-scheduler.log.pos
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tag kube.scheduler
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</source>
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<match **>
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@type elasticsearch
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include_tag_key true
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host elasticsearch-logging
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port 9200
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logstash_format true
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# Set the chunk limit the same as for fluentd-gcp.
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buffer_chunk_limit 2M
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# Cap buffer memory usage to 2MiB/chunk * 32 chunks = 64 MiB
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buffer_queue_limit 32
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# Flush buffer every 30s to write to Elasticsearch
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flush_interval 30s
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# Never wait longer than 5 minutes between retries.
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max_retry_wait 300
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# Disable the limit on the number of retries (retry forever).
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disable_retry_limit
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# Use multiple threads for processing.
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num_threads 8
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</match>
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