295 lines
11 KiB
Text
295 lines
11 KiB
Text
# This configuration file for Fluentd / td-agent is used
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# to watch changes to Docker log files that live in the
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# directory /var/lib/docker/containers/ and are symbolically
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# linked to from the /var/log directory using names that capture the
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# pod name and container name. These logs are then submitted to
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# Google Cloud Logging which assumes the installation of the cloud-logging plug-in.
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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 like like this JSON:
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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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#
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# The record reformer is used to write the tag to focus on the pod name
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# and the Kubernetes container name. For example a Docker container's logs
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# might be in the directory:
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# /var/lib/docker/containers/997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b
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# and in the file:
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# 997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b-json.log
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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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# 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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# 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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# /var/log/containers/synthetic-logger-0.25lps-pod_default-synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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# This results in the tag:
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# var.log.containers.synthetic-logger-0.25lps-pod_default-synth-lgr-997599971ee6366d4a5920d25b79286ad45ff37a74494f262e3bc98d909d0a7b.log
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# The record reformer is used is discard the var.log.containers prefix and
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# the Docker container ID suffix and "kubernetes." is pre-pended giving the
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# final tag which is ingested into Elasticsearch:
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# kubernetes.synthetic-logger-0.25lps-pod_default-synth-lgr
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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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# Prevent fluentd from handling records containing its own logs. Otherwise
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# it can lead to an infinite loop, when error in sending one message generates
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# another message which also fails to be sent and so on.
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<match fluent.**>
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type null
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</match>
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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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format json
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time_key time
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path /var/log/containers/*.log
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pos_file /var/log/gcp-containers.log.pos
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time_format %Y-%m-%dT%H:%M:%S.%NZ
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tag reform.*
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read_from_head true
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</source>
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<filter reform.**>
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type parser
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format /^(?<severity>\w)(?<time>\d{4} [^\s]*)\s+(?<pid>\d+)\s+(?<source>[^ \]]+)\] (?<log>.*)/
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reserve_data true
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suppress_parse_error_log true
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key_name log
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</filter>
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<match reform.**>
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type record_reformer
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enable_ruby true
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tag kubernetes.${tag_suffix[4].split('-')[0..-2].join('-')}
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</match>
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# Example:
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# 2015-12-21 23:17:22,066 [salt.state ][INFO ] Completed state [net.ipv4.ip_forward] at time 23:17:22.066081
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<source>
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type tail
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format /^(?<time>[^ ]* [^ ,]*)[^\[]*\[[^\]]*\]\[(?<severity>[^ \]]*) *\] (?<message>.*)$/
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time_format %Y-%m-%d %H:%M:%S
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path /var/log/salt/minion
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pos_file /var/log/gcp-salt.pos
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tag salt
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</source>
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# Example:
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# Dec 21 23:17:22 gke-foo-1-1-4b5cbd14-node-4eoj startupscript: Finished running startup script /var/run/google.startup.script
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<source>
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type tail
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format syslog
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path /var/log/startupscript.log
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pos_file /var/log/gcp-startupscript.log.pos
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tag startupscript
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</source>
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# Examples:
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# time="2016-02-04T06:51:03.053580605Z" level=info msg="GET /containers/json"
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# time="2016-02-04T07:53:57.505612354Z" level=error msg="HTTP Error" err="No such image: -f" statusCode=404
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<source>
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type tail
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format /^time="(?<time>[^)]*)" level=(?<severity>[^ ]*) msg="(?<message>[^"]*)"( err="(?<error>[^"]*)")?( statusCode=($<status_code>\d+))?/
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path /var/log/docker.log
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pos_file /var/log/gcp-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/gcp-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/gcp-kubelet.log.pos
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tag 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/gcp-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/gcp-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/gcp-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/gcp-kube-scheduler.log.pos
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tag kube-scheduler
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</source>
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# Example:
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# I1104 10:36:20.242766 5 rescheduler.go:73] Running Rescheduler
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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/rescheduler.log
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pos_file /var/log/gcp-rescheduler.log.pos
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tag rescheduler
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</source>
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# Example:
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# I0603 15:31:05.793605 6 cluster_manager.go:230] Reading config from path /etc/gce.conf
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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/glbc.log
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pos_file /var/log/gcp-glbc.log.pos
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tag glbc
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</source>
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# Example:
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# I0603 15:31:05.793605 6 cluster_manager.go:230] Reading config from path /etc/gce.conf
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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/cluster-autoscaler.log
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pos_file /var/log/gcp-cluster-autoscaler.log.pos
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tag cluster-autoscaler
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</source>
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# Logs from systemd-journal for interesting services.
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<source>
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type systemd
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filters [{ "_SYSTEMD_UNIT": "docker.service" }]
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pos_file /var/log/gcp-journald-docker.pos
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read_from_head true
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tag docker
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</source>
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<source>
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type systemd
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filters [{ "_SYSTEMD_UNIT": "kubelet.service" }]
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pos_file /var/log/gcp-journald-kubelet.pos
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read_from_head true
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tag kubelet
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</source>
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# We use 2 output stanzas - one to handle the container logs and one to handle
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# the node daemon logs, the latter of which explicitly sends its logs to the
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# compute.googleapis.com service rather than container.googleapis.com to keep
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# them separate since most users don't care about the node logs.
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<match kubernetes.**>
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type google_cloud
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# Set the buffer type to file to improve the reliability and reduce the memory consumption
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buffer_type file
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buffer_path /var/log/fluentd-buffers/kubernetes.containers.buffer
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# Set queue_full action to block because we want to pause gracefully
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# in case of the off-the-limits load instead of throwing an exception
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buffer_queue_full_action block
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# Set the chunk limit conservatively to avoid exceeding the GCL limit
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# of 10MiB per write request.
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buffer_chunk_limit 2M
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# Cap the combined memory usage of this buffer and the one below to
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# 2MiB/chunk * (6 + 2) chunks = 16 MiB
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buffer_queue_limit 6
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# Never wait more than 5 seconds before flushing logs in the non-error case.
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flush_interval 5s
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# Never wait longer than 30 seconds between retries.
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max_retry_wait 30
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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 2
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</match>
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# Keep a smaller buffer here since these logs are less important than the user's
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# container logs.
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<match **>
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type google_cloud
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detect_subservice false
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buffer_type file
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buffer_path /var/log/fluentd-buffers/kubernetes.system.buffer
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buffer_queue_full_action block
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buffer_chunk_limit 2M
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buffer_queue_limit 2
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flush_interval 5s
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max_retry_wait 30
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disable_retry_limit
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num_threads 2
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</match>
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