We are using the fluent-plugin-grep:
This is how my filter looks like
<filter **>
#type grep
regexp1 level ERROR
</filter>
How do I have to change this filter when I want to filter on level ERROR or FATAL? (so not only error)?
You can use OR pattern in regeular expression.
Try following configuration.
<filter test.**>
#type grep
regexp1 level (ERROR|FATAL)
</filter>
Related
I use few services in EKS cluster. I want the logs from 1 of my services to be parsed
kubectl logs "pod_name" --> this are the logs when I check directly in the pod service
2022-09-21 10:44:26,434 [springHikariCP housekeeper ] DEBUG HikariPool - springHikariCP - Fill pool skipped, pool is at sufficient level.
2022-09-21 10:44:36,316 [springHikariCP housekeeper ] DEBUG HikariPool - springHikariCP - Before cleanup stats (total=10, active=0, idle=10, waiting=0)
This service has java based login (Apache Commons logging) and in kibana at the moment is displayed whole log message with date and time + Log Level + message :
Is it possible this whole log to be parsed into the separate fields (time and date + Log Level + message) and displayed in the Kibana like that.
This is my fluentd config file for the source and pattern:
<source>
#type tail
path /var/log/containers/*background-executor*.log
pos_file fluentd-docker.pos
tag kubernetes.*
read_from_head true
<parse>
#type multi_format
<pattern>
format json
time_key time
time_type string
time_format "%Y-%m-%dT%H:%M:%S.%NZ"
keep_time_key false
</pattern>
<pattern>
format regexp
expression /^(?<time>\d{4}-\d{1,2}-\d{1,2} \d{1,2}:\d{1,2}:\d{1,2}.\d{3})\s+(?<level>[^\s]+)\s+(?<pid>\d+).*?\[\s+(?<thread>.*)\]\s+(?<class>.*)\s+:\s+(?<message>.*)/
time_format '%Y-%m-%dT%H:%M:%S.%N%:z'
keep_time_key false
</pattern>
</parse>
</source>
You have to just update the filter as per need
<filter **>
#type record_transformer
enable_ruby
<record>
foo "bar"
KEY "VALUE"
podname "${record['tailed_path'].to_s.split('/')[-3]}"
test "passed"
time "${record['message'].match('[0-9]{2}\\/[A-Z][a-z]{2}\\/[0-9]{4}:[0-9]{2}:[0-9]{2}:[0-9]{2}\\s
+[0-9]{4}').to_s}"
</record>
</filter>
you have to parse the record & message with data something like if between [0-9] or [A-Z] same way show in above example.
Edit the filter.conf
You can create your own Key and value, in value you have to parse the filed and flutenD will populate the value.
We have a requirement where we need to forward only specific string logs to kibana endpoint/console. Currently we are getting pattern not match line where the matched string not found. How to ignore those logs not to send to forwarder and only send match logs.
<source>
#type tail
path session.txt
pos_file session.txt.pos
tag sessionlog
<parse>
#type regexp
expression ^\<#\>\s+(?<time>\w+/\w+/\w+\s+[:0-9]+)\s+(?<hostname>[-0-9A-Z]+)\s+(?<message>.*Clip.*)$/
</parse>
</source>
<match sessionlog>
#type stdout
</match>
<#> 2019/11/16 13:56:33 ABC-Hostanme 278424 Dispatcher_1 Msg [Unit1] error emitted: '404'from session start: 2021-11-16T08:54:01
<#> 2019/11/16 13:56:33 ABC-Hostanme 278424 Dispatcher_1 Msg [Unit1] clip result: a1=0, a2=217, a3=152475, a4=148692
Result:
[warn]: #0 pattern not match: <#> 2019/11/16 13:56:33 ABC-Hostanme 278424 Dispatcher_1 Msg [Unit1] error emitted: '404'from session start: 2021-11-16T08:54:01
sessionlog: {"hostname":"DESKTOP-3JOOBVV","message":"278424 Dispatcher_1 Msg [Unit1] clip result: a1=0, a2=217, a3=152475, a4=148692"}
We want to get only matched pattern logs.
#sunshine, If the regexp parser cannot extract a match from the log, it will emit that error. So, its recommended that all log lines passing through the regexp parser can be matched by the expression. I recommend you use the grep filter before the regexp parser to avoid those "pattern not match" logs from fluentd.
I've pasted an example below but you can also use <exclude> blocks in the grep filter. See here for more info and examples: https://docs.fluentd.org/filter/grep
<source>
#type tail
path session.txt
pos_file session.txt.pos
tag sessionlog
</source>
<filter sessionlog>
#type grep
<regexp>
key message
pattern /INCLUDE_PATTERN_HERE/
</regexp>
</filter>
<filter sessionlog>
#type parser
key_name message
reserve_data true
<parse>
#type regexp
expression ^\<#\>\s+(?<time>\w+/\w+/\w+\s+[:0-9]+)\s+(?<hostname>[-0-9A-Z]+)\s+(?<message>.*Clip.*)$/
</parse>
</filter>
<match sessionlog>
#type stdout
</match>
The answer of #renegaderyu is a very clear solution. FluentD, however, offers a less verbose, built-in solution. You can just set the key emit_invalid_record_to_error to false inside the <filter> in which you parse. It is important to note that this option only works in a <filter> and does not have any effect within a <source>.
<source>
#type tail
path session.txt
pos_file session.txt.pos
tag sessionlog
</source>
<filter sessionlog>
#type parser
key_name message
reserve_data true
<parse>
#type regexp
expression ^\<#\>\s+(?<time>\w+/\w+/\w+\s+[:0-9]+)\s+(?<hostname>[-0-9A-Z]+)\s+(?<message>.*Clip.*)$/
</parse>
emit_invalid_record_to_error false
</filter>
<match sessionlog>
#type stdout
</match>
I have certain log messages from certain services that are in JSON format; and then this fluentd filter is able to parse that properly. However with this; it discards all other logs from other components whose message field is not proper JSON.
<source>
#type tail
#id in_tail_container_logs
path /var/log/containers/*.log
pos_file /var/log/fluentd-containers.log.pos
tag "#{ENV['FLUENT_CONTAINER_TAIL_TAG'] || 'kubernetes.*'}"
exclude_path "#{ENV['FLUENT_CONTAINER_TAIL_EXCLUDE_PATH'] || use_default}"
read_from_head true
#https://github.com/fluent/fluentd-kubernetes-daemonset/issues/434#issuecomment-752813739
#<parse>
# #type "#{ENV['FLUENT_CONTAINER_TAIL_PARSER_TYPE'] || 'json'}"
# time_format %Y-%m-%dT%H:%M:%S.%NZ
#</parse>
#https://github.com/fluent/fluentd-kubernetes-daemonset/issues/434#issuecomment-831801690
<parse>
#type cri
<parse> # this will parse the neseted feilds properly - like message in JSON; but if mesage is not in json then this is lost
#type json
</parse>
</parse>
#emit_invalid_record_to_error # when nested logging fails, see if we can parse via JSON
#tag backend.application
</source>
But all other messages which do not have proper JSON format are lost;
If I comment out the nested parse part inside type cri; then I get all logs; but logs whose messages are in JSON format are not parsed further. Espcially severity field.See last two lines in the screen shot below
<parse>
#type cri
</parse>
To overcome this ; I try to use the LABEL #ERROR, if nested parsing fails for some logs; whose message is not in JSON format- I need to still see the pod name and other details and message as text in Kibana; However with the below config, it is only able to parse logs whose message is proper JSON format
<source>
#type tail
#id in_tail_container_logs
path /var/log/containers/*.log
pos_file /var/log/fluentd-containers.log.pos
tag "#{ENV['FLUENT_CONTAINER_TAIL_TAG'] || 'kubernetes.*'}"
exclude_path "#{ENV['FLUENT_CONTAINER_TAIL_EXCLUDE_PATH'] || use_default}"
read_from_head true
#https://github.com/fluent/fluentd-kubernetes-daemonset/issues/434#issuecomment-752813739
#<parse>
# #type "#{ENV['FLUENT_CONTAINER_TAIL_PARSER_TYPE'] || 'json'}"
# time_format %Y-%m-%dT%H:%M:%S.%NZ
#</parse>
#https://github.com/fluent/fluentd-kubernetes-daemonset/issues/434#issuecomment-831801690
<parse>
#type cri
<parse> # this will parse the neseted feilds properly - like message in JSON; but if mesage is not in json then this is lost
#type json
</parse>
</parse>
#emit_invalid_record_to_error # when nested logging fails, see if we can parse via JSON
#tag backend.application
</source>
<label #ERROR> # when nested logs fail this is not working
<filter **>
#type parser
key_name message
<parse>
#type none
</parse>
</filter>
<match kubernetes.var.log.containers.elasticsearch-kibana-**> #ignore from this container
#type null
</match>
</label>
How do I get logs whose messages are JSON formatted parsed; and whose messages are in text; as is without getting lost ?
Config here (last there commits) https://github.com/alexcpn/grpc_templates.git
One way to solve this issue is to prepare the logs before parsing them with cir plugin, to do so you need to perform the following steps
collect container logs and tag them with a given tag.
classify the logs to JSON and none JSON logs using rewrite_tag_filter. and regex.
parse JSON logs with cri
parse none JSON Logs
example of configs (not tested)
## collect row logs from files
<source>
#type tail
#id in_tail_container_logs
path /var/log/containers/*.log
pos_file /var/log/fluentd-containers.log.pos
tag kubernetes.*
exclude_path "#{ENV['FLUENT_CONTAINER_TAIL_EXCLUDE_PATH'] || use_default}"
read_from_head true
format json
</source>
# add metadata to the records (container_name, image etc..)
<filter kubernetes.**>
#type kubernetes_metadata
</filter>
# classify the logs to different categories
<match kubernetes.**>
#type rewrite_tag_filter
<rule>
key message
pattern /^\{.+\}$/
tag json.${tag}
</rule>
<rule>
key message
pattern /^\{.+\}$/
tag nonejson.${tag}
invert true
</rule>
</match>
# filter or match logs that match the json tag
<filter json.**>
</filter>
<match json.**>
</match>
# filter or match logs that match the none json tag
<filter nonejson.**>
</filter>
<match nonejson.**>
</match>
I'm trying to send logs from td-agent to Datadog using the below configuration. My expectation is filtering some keywords and formating that logs with using CSV format type. How can I do this?
I tried to grep and format plugin in the filter section as below but it doesn't work as expected. The current and expected situation as below picture. How can I solve this situation?
<source>
#type syslog
port 8888
tag rsyslog
</source>
<filter rsyslog.**>
#type grep
<regexp>
key message
pattern /COMMAND/
</regexp>
<format>
#type csv
fields hostname,from,to
</format>
</filter>
<match rsyslog.**>
#type datadog
#id awesome_agent
api_key xxxxxxxxxx
</match>
current
expected
2019/08/13 13:13:17 [DEBUG] Hello, world!
2019/08/13 13:13:17 [INFO] Ignore me
2019/08/13 13:13:17 [INFO] SPECIFIC_LOG :{"name": "mark"}
I have like above logs, and I need to grep only the logs which contains 'SPECIFIC_LOG' and I want to ignore the others.
I tried to set the config like this,
<source>
#type tail
path ./sample.log
tag debug.sample
<parse>
#type regexp
expression /\[\w+\] SPECIFIC_LOG\s:(?<message>.*)$/
</parse>
</source>
<filter debug.**>
#type parser
key_name message
format json
</filter>
And it is working for the matched log with pattern, but for the not matched log, I got warning which says
#0 pattern not matched: "2019/08/13 13:13:17 [DEBUG] Hello, world!"
How can I grep only the log which is matched the pattern, so that I can resolve the warning?
It is just a warning that pattern did not match and in my opinion, it can be ignored.
To ignore such warnings, you can set emit_invalid_record_to_error false option.
<filter debug.**>
#type parser
key_name message
format json
emit_invalid_record_to_error false
</filter>
More info on this flag -
https://docs.fluentd.org/filter/parser#emit_invalid_record_to_error
Earlier versions had suppress_parse_error_log flag and now it has been replaced with emit_invalid_record_to_error.
suppress_parse_error_log is missing. What are the alternatives?
Since v1, parser filter doesn't support suppress_parse_error_log parameter because parser filter uses #ERROR feature instead of internal logging to rescue invalid records. If you want to simply ignore invalid records, set emit_invalid_record_to_error false.
See also emit_invalid_record_to_error parameter.