#!/bin/bash

# Define the log file
LOG_FILE="quotes.log"

# Define quotes
LOTR_QUOTES=(
    "One does not simply walk into Mordor."
    "Even the smallest person can change the course of the future."
    "All we have to decide is what to do with the time that is given us."
    "There is some good in this world, and it's worth fighting for."
)

STAR_WARS_QUOTES=(
    "Do or do not, there is no try."
    "The Force will be with you. Always."
    "I find your lack of faith disturbing."
    "In my experience, there is no such thing as luck."
)

# Function to get a random quote
get_random_quote() {
    if (( RANDOM % 2 == 0 )); then
        echo "${LOTR_QUOTES[RANDOM % ${#LOTR_QUOTES[@]}]}"
    else
        echo "${STAR_WARS_QUOTES[RANDOM % ${#STAR_WARS_QUOTES[@]}]}"
    fi
}

# Function to get a random log level
get_random_log_level() {
    LOG_LEVELS=("INFO" "WARN" "ERROR" "DEBUG")
    echo "${LOG_LEVELS[RANDOM % ${#LOG_LEVELS[@]}]}"
}

# Function to generate log entry
generate_log_entry() {
    TIMESTAMP=$(date "+%Y-%m-%d %H:%M:%S")
    LEVEL=$(get_random_log_level)
    MESSAGE=$(get_random_quote)
    
    if [ "$JSON_OUTPUT" = true ]; then
        echo "{\"timestamp\": \"$TIMESTAMP\", \"level\": \"$LEVEL\", \"message\": \"$MESSAGE\"}"
    else
        echo "$TIMESTAMP [$LEVEL] - $MESSAGE"
    fi
}

# Parse command line arguments
JSON_OUTPUT=false
while [[ "$#" -gt 0 ]]; do
    case $1 in
        -json)
            JSON_OUTPUT=true
            ;;
    esac
    shift
done

# Main loop to write logs
echo "Writing logs to $LOG_FILE. Press Ctrl+C to stop."
while true; do
    generate_log_entry >> "$LOG_FILE"
    sleep 1 # Adjust this value for log frequency
done

WORKSHOP
├── 1-agent
├── 2-gateway
├── 3-filelog
│   ├── agent.yaml          # Agent Collector configuration file
│   ├── gateway.yaml        # Gateway Collector configuration file
│   ├── log-gen.(sh or ps1) # Script to write a file with logs lines 
│   └── trace.json          # Example trace file 
└── otelcol                 # OpenTelemetry Collector binary

./log-gen.sh

Writing logs to quotes.log. Press Ctrl+C to stop.

WORKSHOP
├── 1-agent
├── 2-gateway
├── 3-filelog
│   ├── agent.yaml          # Agent Collector configuration file
│   ├── gateway-logs.out    # Output from the gateway logs pipeline
│   ├── gateway-metrics.out # Output from the gateway metrics pipeline
│   ├── gateway.yaml        # Gateway Collector configuration file
│   ├── log-gen.(sh or ps1) # Script to write a file with logs lines 
│   ├── quotes.log          # File containing Random log lines
│   └── trace.json          # Example trace file 
└── otelcol                 # OpenTelemetry Collector binary

{"resourceLogs":[{"resource":{"attributes":[{"key":"com.splunk.sourcetype","value":{"stringValue":"quotes"}},{"key":"com.splunk/source","value":{"stringValue":"./quotes.log"}},{"key":"host.name","value":{"stringValue":"[YOUR_HOST_NAME]"}},{"key":"os.type","value":{"stringValue":"[YOUR_OS]"}},{"key":"otelcol.service.mode","value":{"stringValue":"agent"}}]},"scopeLogs":[{"scope":{},"logRecords":[{"observedTimeUnixNano":"1737231901720160600","body":{"stringValue":"2025-01-18 21:25:01 [WARN] - Do or do not, there is no try."},"attributes":[{"key":"log.file.path","value":{"stringValue":"quotes.log"}}],"traceId":"","spanId":""}]}],"schemaUrl":"https://opentelemetry.io/schemas/1.6.1"}]}
{"resourceLogs":[{"resource":{"attributes":[{"key":"com.splunk/source","value":{"stringValue":"./quotes.log"}},{"key":"com.splunk.sourcetype","value":{"stringValue":"quotes"}},{"key":"host.name","value":{"stringValue":"PH-Windows-Box.hagen-ict.nl"}},{"key":"os.type","value":{"stringValue":"windows"}},{"key":"otelcol.service.mode","value":{"stringValue":"agent"}}]},"scopeLogs":[{"scope":{},"logRecords":[{"observedTimeUnixNano":"1737231902719133000","body":{"stringValue":"2025-01-18 21:25:02 [DEBUG] - One does not simply walk into Mordor."},"attributes":[{"key":"log.file.path","value":{"stringValue":"quotes.log"}}],"traceId":"","spanId":""}]}],"schemaUrl":"https://opentelemetry.io/schemas/1.6.1"}]}

{"resourceLogs":[{"resource":{"attributes":[{"key":"com.splunk.sourcetype","value":{"stringValue":"quotes"}},{"key":"com.splunk/source","value":{"stringValue":"./quotes.log"}},{"key":"host.name","value":{"stringValue":"[YOUR_HOST_NAME]"}},{"key":"os.type","value":{"stringValue":"[YOUR_OS]"}},{"key":"otelcol.service.mode","value":{"stringValue":"agent"}}]}}]}