apiVersion: opentelemetry.io/v1alpha1
kind: Instrumentation
metadata:
  name: {Instrumentation name}
spec:
  exporter:
    endpoint: {log-agent Service address}:4318
  java:
    env:
      - name: OTEL_LOGS_EXPORTER
        value: otlp
      - name: OTEL_METRICS_EXPORTER
        value: none
      - name: OTEL_TRACES_EXPORTER
        value: otlp              
      - name: OTEL_EXPORTER_OTLP_PROTOCOL
        value: http/protobuf
        
      # Used when you want to collect all Java applications for which the anotation value of the namespace is 'true'..                
      - name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
        value: {log-agent Service address}:4318/v1/logs

instrumentation.opentelemetry.io/inject-java: 'true'

apiVersion: apps/v1
kind: Deployment
...
spec:
...
  template:
    spec:
      containers:
      - env:

	# Application name
	- name: OTEL_SERVICE_NAME
          value: {Application name}
        
        # Settings for authentication
        - name: OTEL_EXPORTER_OTLP_LOGS_HEADERS
          value: app_token={Application token},app_name={Application name}        
        
        image: {java-application image}
        imagePullPolicy: Always
        ...

apiVersion: opentelemetry.io/v1alpha1
kind: Instrumentation
metadata:
  name: {Instrumentation name}
spec:
  exporter:
    endpoint: {log-agent Service address}:4318
  python:
    image: ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-python:0.44b0
    env:
      - name: OTEL_LOGS_EXPORTER
        value: otlp_proto_http
      - name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
        value: {log-agent Service address}:4318/v1/logs
      - name: OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED
        value: 'true'
        
      # Used when you want to collect all Java applications for which the anotation value of the namespace is 'true'.
      - name: OTEL_EXPORTER_OTLP_LOGS_HEADERS
        value: app_token={Application Token},app_name={Application Name}

instrumentation.opentelemetry.io/inject-python: 'true'

apiVersion: apps/v1
kind: Deployment
...
spec:
...
  template:
    spec:
      containers:
      - env:

	# Application name
	- name: OTEL_SERVICE_NAME
          value: {Application name}
        
        # Settings for authentication
        - name: OTEL_EXPORTER_OTLP_LOGS_HEADERS
          value: app_token={Application token},app_name={application name}     
        
        image: {python-application image}
        imagePullPolicy: Always
        ...

    ...

    <appender name="OpenTelemetry"
              class="io.opentelemetry.instrumentation.logback.appender.v1_0.OpenTelemetryAppender">
    </appender>

    ...
 
    <logger name="OTLP" additivity="false">
        <appender-ref ref="OpenTelemetry"/>
        <level value="INFO"/>
    </logger>

<Configuration status="WARN" packages="io.opentelemetry.instrumentation.log4j.appender.v2_17">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout
          pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} trace_id: %X{trace_id} span_id: %X{span_id} trace_flags: %X{trace_flags} - %msg%n"/>
    </Console>
    <OpenTelemetry name="OpenTelemetryAppender"/>
  </Appenders>
  <Loggers>
    <Root>
      <AppenderRef ref="OpenTelemetryAppender" level="All"/>
      <AppenderRef ref="Console" level="All"/>
    </Root>
  </Loggers>
</Configuration>

private static final Logger logger = LoggerFactory.getLogger("OTLP");
// Logging with a logger called OTLP. This can be changed
// If you set it to 'ALL' in the above document, you can log with console and opentelemetry.

...

# Required settings to export log
ENV OTEL_EXPORTER_OTLP_ENDPOINT=$OTEL_EXPORTER_OTLP_ENDPOINT
ENV OTEL_EXPORTER_OTLP_LOGS_ENDPOINT=$OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
ENV OTEL_EXPORTER_OTLP_LOGS_HEADERS=$OTEL_EXPORTER_OTLP_LOGS_HEADERS
ENV OTEL_LOGS_EXPORTER=$OTEL_LOGS_EXPORTER
ENV OTEL_SERVICE_NAME=$OTEL_SERVICE_NAME

# None processing to not collect metrics and traces
ENV OTEL_METRICS_EXPORTER=none
ENV OTEL_TRACES_EXPORTER=none


# Download sdk
RUN wget -q https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v2.0.0/opentelemetry-javaagent.jar
ENTRYPOINT ["java", "-javaagent:opentelemetry-javaagent.jar", "-jar", "app.jar"]

...

apiVersion: apps/v1
kind: Deployment
...
spec:
...
  template:
    spec:
      containers:
      - env:
	# opentelemetry collector svc address (eg. http://log-agent-cocktail-log-agent.cocktail-addon:4318)
	- name: OTEL_EXPORTER_OTLP_ENDPOINT
          value: {log-agent Service address}:4318

	# Log service address of opentelemetry collector (eg. http://log-agent-cocktail-log-agent.cocktail-addon:4318/v1/logs)
        - name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
          value: {log-agent Service address}:4318/v1/logs

	# Settings using opelemetry protocol
        - name: OTEL_LOGS_EXPORTER
          value: otlp
        
	# Application Name
	- name: OTEL_SERVICE_NAME
          value: {Application Name}
        
        # Settings for authentication
        - name: OTEL_EXPORTER_OTLP_LOGS_HEADERS
          value: app_token={Application Token},app_name={Application Name}        
        
        image: {java-application image}
        imagePullPolicy: Always
        ...

...

# flask 애플리케이션용 opentelemetry Sdk 다운로드
RUN pip install --upgrade pip && pip install opentelemetry-distro && opentelemetry-bootstrap -a install && pip install flask

# Log를 Export할 필수설정
ENV OTEL_EXPORTER_OTLP_ENDPOINT=$OTEL_EXPORTER_OTLP_ENDPOINT
ENV OTEL_EXPORTER_OTLP_LOGS_ENDPOINT=$OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
ENV OTEL_EXPORTER_OTLP_LOGS_HEADERS=$OTEL_EXPORTER_OTLP_LOGS_HEADERS
ENV OTEL_SERVICE_NAME=$OTEL_SERVICE_NAME
ENV OTEL_LOGS_EXPORTER=$OTEL_LOGS_EXPORTER

# Python 애플리케이션 로깅을 위한 필수 설정
ENV OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED=true

# metric과 trace를 수집하지 않기 위한 none 처리
ENV OTEL_METRICS_EXPORTER=none
ENV OTEL_TRACES_EXPORTER=none

...

apiVersion: apps/v1
kind: Deployment
...
spec:
...
  template:
    spec:
      containers:
      - env:
	# opentelemetry collector svc address (eg. http://log-agent-cocktail-log-agent.cocktail-addon:4318)
	- name: OTEL_EXPORTER_OTLP_ENDPOINT
          value: {log-agent Service address}:4318

	# Log service address of opentelemetry collector (eg. http://log-agent-cocktail-log-agent.cocktail-addon:4318/v1/logs)
        - name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT
          value: {log-agent Service address}:4318/v1/logs

	# Settings using opelemetry protocol
        - name: OTEL_LOGS_EXPORTER
          value: otlp_proto_http
        
	# Application Name
	- name: OTEL_SERVICE_NAME
          value: {Application Name}
        
        # Settings for authentication
        - name: OTEL_EXPORTER_OTLP_LOGS_HEADERS
          value: app_token={Application Token},app_name={Application Name}        
        
        image: {python-application image}
        imagePullPolicy: Always
        ...

[SERVICE]
        Flush         1
        Log_Level     info
        Daemon        off
        Parsers_File  parsers.conf


[INPUT]
        Name         tail
        Path         [The path to the log file where the log will be loaded]
        
[OUTPUT]
        Name         stdout
        Match        *

[FILTER]
        Name parser
        Match *
        Key_Name log
        Parser nginx
        # Setting to preserve existing log messages before parsing (true: preservation)
        Preserve_Key true
        Reserve_Data true

# instrumentation_scope, service.name.. in body
[FILTER]
        Name        modify
        Match       *
        Add         service.name 'Application Name'       

# Handled by user by inserting script
[FILTER]
        Name        lua
        Match       *
        script      rewrite.lua
        call        rewrite_tag
        

[OUTPUT]
        Name         opentelemetry
        Match        *
        # Host	     log-agent-cocktail-log-agent.cocktail-addon
        Host         'log-agent Service Address'
        Port         4318
        metrics_uri  /v1/metrics
        logs_uri     /v1/logs
        traces_uri   /v1/traces
        header       app_token 'Token'
        header	     app_name  'Application Name'
        Log_response_payload True
        tls          off
        tls.verify   off
        logs_body_key_attributes true

[PARSER]
    Name   nginx
    Format regex
    Regex ^(?<remote>[^ ]*) (?<host>[^ ]*) (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^\"]*?)(?: +\S*)?)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")
    Time_Key time
    Time_Format %d/%b/%Y:%H:%M:%S 

# A script that adds the value INFO to the value level if the code value is 200, and the value ERROR if it is not 200.
function rewrite_tag(tag, timestamp, record)
    if record["code"] == "200" then
        record["level"] = "INFO"
    else
        record["level"] = "ERROR"
    end
    return 1, timestamp, record
end