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    Collect Nagios XI logs

    Supported in:

    This document explains how to ingest Nagios XI logs to Google Security Operations using Google Cloud Storage V2.

    Nagios XI is a comprehensive infrastructure monitoring solution that provides monitoring of servers, networks, applications, and services. It tracks host and service status, performance metrics, and generates alerts for IT infrastructure issues through its REST API.

    Before you begin

    Ensure that you have the following prerequisites:

    • A Google SecOps instance
    • A GCP project with Cloud Storage, Cloud Run, Pub/Sub, and Cloud Scheduler APIs enabled
    • Permissions to create and manage GCS buckets
    • Permissions to manage IAM policies on GCS buckets
    • Permissions to create Cloud Run services, Pub/Sub topics, and Cloud Scheduler jobs
    • Privileged access to Nagios XI with user management permissions
    • Nagios XI version 5 or later (REST API support)

    Configure Nagios XI API access

    To enable Google SecOps to retrieve monitoring data, you need to create a user account with API access and read-only permissions.

    Create a read-only user with API access

    1. Sign in to the Nagios XIweb interface with administrator privileges.
    2. Go to Admin > Manage Users.
    3. Click Add New User.
    4. Provide the following configuration details:
      • Username: Enter a descriptive name (for example, chronicle-integration )
      • Password: Enter a secure password
      • Name: Enter Chronicle Integration User
      • Email Address: Enter a valid email address
    5. In the Security Settingssection, configure the following:
      • Authorization Level: Select User
      • Can see all hosts and services: Check this option
      • Read-only access: Check this option
      • API access: Check this option
    6. Uncheck the following options:
      • Force Password Change at Next Login
      • Email User Account Information
      • Create as Monitoring Contact
    7. Ensure Account Enabledis checked.
    8. Click Add User.

    Retrieve the API key

    1. In the Manage Userspage, click on the user account ( chronicle-integration ).
    2. In the user account settings page, locate the API Keyfield.

    3. Copy the API key value.

    Verify permissions

    To verify the account has the required permissions:

    1. Sign in to Nagios XIwith the chronicle-integration user account.
    2. Go to Home > Host Status.
    3. If you can see all monitored hosts and services, you have the required permissions.
    4. If you cannot see hosts or services, contact your administrator to grant Can see all hosts and servicespermission.

    Test API access

    • Test your credentials before proceeding with the integration:

        # Replace with your actual values 
 NAGIOS_HOST 
 = 
 "https://your-nagios-server.example.com" 
 API_KEY 
 = 
 "your-api-key" 
 # Test API access - query host status 
curl  
-k  
 " 
 ${ 
 NAGIOS_HOST 
 } 
 /nagiosxi/api/v1/objects/hoststatus?apikey= 
 ${ 
 API_KEY 
 } 
& pretty=1"

      A successful response returns a JSON object containing host status information.

    Create Google Cloud Storage bucket

    1. Go to the Google Cloud Console .
    2. Select your project or create a new one.
    3. In the navigation menu, go to Cloud Storage > Buckets.
    4. Click Create bucket.

    5. Provide the following configuration details:

      Setting Value
      Name your bucket Enter a globally unique name (for example, nagios-xi-logs )
      Location type Choose based on your needs (Region, Dual-region, Multi-region)
      Location Select the location (for example, us-central1 )
      Storage class Standard (recommended for frequently accessed logs)
      Access control Uniform (recommended)
      Protection tools Optional: Enable object versioning or retention policy

    6. Click Create.

    1. In the GCP Console, go to IAM & Admin > Service Accounts.
    2. Click Create Service Account.
    3. Provide the following configuration details:
      • Service account name: Enter nagios-logs-collector-sa
      • Service account description: Enter Service account for Cloud Run function to collect Nagios XI logs
    4. Click Create and Continue.
    5. In the Grant this service account access to projectsection, add the following roles:
      1. Click Select a role.
      2. Search for and select Storage Object Admin.
      3. Click + Add another role.
      4. Search for and select Cloud Run Invoker.
      5. Click + Add another role.
      6. Search for and select Cloud Functions Invoker.
    6. Click Continue.
    7. Click Done.

    Grant IAM permissions on GCS bucket

    1. Go to Cloud Storage > Buckets.
    2. Click on your bucket name ( nagios-xi-logs ).
    3. Go to the Permissionstab.
    4. Click Grant access.
    5. Provide the following configuration details:
      • Add principals: Enter the service account email ( nagios-logs-collector-sa@PROJECT_ID.iam.gserviceaccount.com )
      • Assign roles: Select Storage Object Admin
    6. Click Save.

    Create Pub/Sub topic

    1. In the GCP Console, go to Pub/Sub > Topics.
    2. Click Create topic.
    3. Provide the following configuration details:
      • Topic ID: Enter nagios-logs-trigger
      • Leave other settings as default
    4. Click Create.

    Create Cloud Run function to collect logs

    The Cloud Run function will be triggered by Pub/Sub messages from Cloud Scheduler to fetch logs from the Nagios XI REST API and write them to GCS.

    1. In the GCP Console, go to Cloud Run.
    2. Click Create service.
    3. Select Function(use an inline editor to create a function).

    4. In the Configuresection, provide the following configuration details:

      Setting Value
      Service name nagios-logs-collector
      Region Select region matching your GCS bucket (for example, us-central1 )
      Runtime Select Python 3.12or later

    5. In the Trigger (optional)section:

      1. Click + Add trigger.
      2. Select Cloud Pub/Sub.
      3. In Select a Cloud Pub/Sub topic, choose nagios-logs-trigger .
      4. Click Save.

    6. In the Authenticationsection:

      1. Select Require authentication.
      2. Check Identity and Access Management (IAM).

    7. Scroll down and expand Containers, Networking, Security.

    8. Go to the Securitytab:

      • Service account: Select nagios-logs-collector-sa

    9. Go to the Containerstab:

      1. Click Variables & Secrets.
      2. Click + Add variablefor each environment variable:
      Variable Name Example Value Description
      GCS_BUCKET
      		nagios-xi-logs GCS bucket name
      GCS_PREFIX
      		nagios-xi Prefix for log files
      STATE_KEY
      		nagios-xi/state.json State file path
      NAGIOS_BASE_URL
      		https://your-nagios-server.example.com Nagios XI base URL
      NAGIOS_API_KEY
      		your-api-key Nagios XI API key
      MAX_RECORDS
      		1000 Max records per endpoint per run
      PAGE_SIZE
      		200 Records per API page
      LOOKBACK_HOURS
      		24 Initial lookback period

    10. In the Variables & Secretssection, scroll down to Requests:

      • Request timeout: Enter 600 seconds (10 minutes)

    11. Go to the Settingstab:

      • In the Resourcessection:
        • Memory: Select 512 MiBor higher
        • CPU: Select 1

    12. In the Revision scalingsection:

      • Minimum number of instances: Enter 0
      • Maximum number of instances: Enter 100

    13. Click Create.

    14. Wait for the service to be created (1-2 minutes).

    15. After the service is created, the inline code editorwill open automatically.

    Add function code

    1. Enter mainin the Entry pointfield.

    2. In the inline code editor, create two files:

      • main.py:

          import 
  
 functions_framework 
 from 
  
 google.cloud 
  
 import 
  storage 
 
 import 
  
 json 
 import 
  
 os 
 import 
  
 urllib3 
 from 
  
 datetime 
  
 import 
 datetime 
 , 
 timezone 
 , 
 timedelta 
 import 
  
 time 
 http 
 = 
 urllib3 
 . 
 PoolManager 
 ( 
 timeout 
 = 
 urllib3 
 . 
 Timeout 
 ( 
 connect 
 = 
 5.0 
 , 
 read 
 = 
 30.0 
 ), 
 retries 
 = 
 False 
 , 
 ) 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 GCS_BUCKET 
 = 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'GCS_BUCKET' 
 ) 
 GCS_PREFIX 
 = 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'GCS_PREFIX' 
 , 
 'nagios-xi' 
 ) 
 STATE_KEY 
 = 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'STATE_KEY' 
 , 
 'nagios-xi/state.json' 
 ) 
 NAGIOS_BASE_URL 
 = 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'NAGIOS_BASE_URL' 
 , 
 '' 
 ) 
 . 
 rstrip 
 ( 
 '/' 
 ) 
 NAGIOS_API_KEY 
 = 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'NAGIOS_API_KEY' 
 ) 
 MAX_RECORDS 
 = 
 int 
 ( 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'MAX_RECORDS' 
 , 
 '1000' 
 )) 
 PAGE_SIZE 
 = 
 int 
 ( 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'PAGE_SIZE' 
 , 
 '200' 
 )) 
 LOOKBACK_HOURS 
 = 
 int 
 ( 
 os 
 . 
 environ 
 . 
 get 
 ( 
 'LOOKBACK_HOURS' 
 , 
 '24' 
 )) 
 ENDPOINTS 
 = 
 [ 
 'hoststatus' 
 , 
 'servicestatus' 
 , 
 'statehistory' 
 , 
 'logentries' 
 , 
 ] 
 @functions_framework 
 . 
 cloud_event 
 def 
  
 main 
 ( 
 cloud_event 
 ): 
 if 
 not 
 all 
 ([ 
 GCS_BUCKET 
 , 
 NAGIOS_BASE_URL 
 , 
 NAGIOS_API_KEY 
 ]): 
 print 
 ( 
 'Error: Missing required environment variables' 
 ) 
 return 
 try 
 : 
 bucket 
 = 
 storage_client 
 . 
  bucket 
 
 ( 
 GCS_BUCKET 
 ) 
 state 
 = 
 load_state 
 ( 
 bucket 
 ) 
 now 
 = 
 datetime 
 . 
 now 
 ( 
 timezone 
 . 
 utc 
 ) 
 if 
 isinstance 
 ( 
 state 
 , 
 dict 
 ) 
 and 
  state 
 
 . 
 get 
 ( 
 'last_event_time' 
 ): 
 try 
 : 
 last_val 
 = 
 state 
 [ 
 'last_event_time' 
 ] 
 if 
 last_val 
 . 
 endswith 
 ( 
 'Z' 
 ): 
 last_val 
 = 
 last_val 
 [: 
 - 
 1 
 ] 
 + 
 '+00:00' 
 last_time 
 = 
 datetime 
 . 
 fromisoformat 
 ( 
 last_val 
 ) 
 last_time 
 = 
 last_time 
 - 
 timedelta 
 ( 
 minutes 
 = 
 2 
 ) 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 "Warning: Could not parse last_event_time: 
 { 
 e 
 } 
 " 
 ) 
 last_time 
 = 
 now 
 - 
 timedelta 
 ( 
 hours 
 = 
 LOOKBACK_HOURS 
 ) 
 else 
 : 
 last_time 
 = 
 now 
 - 
 timedelta 
 ( 
 hours 
 = 
 LOOKBACK_HOURS 
 ) 
 print 
 ( 
 f 
 "Fetching logs from 
 { 
 last_time 
 . 
 isoformat 
 () 
 } 
 to 
 { 
 now 
 . 
 isoformat 
 () 
 } 
 " 
 ) 
 start_ts 
 = 
 int 
 ( 
 last_time 
 . 
 timestamp 
 ()) 
 end_ts 
 = 
 int 
 ( 
 now 
 . 
 timestamp 
 ()) 
 all_records 
 = 
 [] 
 newest_time 
 = 
 None 
 for 
 endpoint 
 in 
 ENDPOINTS 
 : 
 records 
 , 
 endpoint_newest 
 = 
 fetch_nagios_endpoint 
 ( 
 endpoint 
 , 
 start_ts 
 , 
 end_ts 
 ) 
 for 
 record 
 in 
 records 
 : 
 record 
 [ 
 '_nagios_endpoint' 
 ] 
 = 
 endpoint 
 all_records 
 . 
 extend 
 ( 
 records 
 ) 
 if 
 endpoint_newest 
 : 
 if 
 newest_time 
 is 
 None 
 or 
 endpoint_newest 
> newest_time 
 : 
 newest_time 
 = 
 endpoint_newest 
 if 
 not 
 all_records 
 : 
 print 
 ( 
 "No new records found." 
 ) 
 save_state 
 ( 
 bucket 
 , 
 now 
 . 
 isoformat 
 ()) 
 return 
 timestamp 
 = 
 now 
 . 
 strftime 
 ( 
 '%Y%m 
 %d 
 _%H%M%S' 
 ) 
 object_key 
 = 
 f 
 " 
 { 
 GCS_PREFIX 
 } 
 /nagios_logs_ 
 { 
 timestamp 
 } 
 .ndjson" 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 object_key 
 ) 
 ndjson 
 = 
 ' 
 \n 
 ' 
 . 
 join 
 ( 
 [ 
 json 
 . 
 dumps 
 ( 
 r 
 , 
 ensure_ascii 
 = 
 False 
 , 
 default 
 = 
 str 
 ) 
 for 
 r 
 in 
 all_records 
 ] 
 ) 
 + 
 ' 
 \n 
 ' 
 blob 
 . 
  upload_from_string 
 
 ( 
 ndjson 
 , 
 content_type 
 = 
 'application/x-ndjson' 
 ) 
 print 
 ( 
 f 
 "Wrote 
 { 
 len 
 ( 
 all_records 
 ) 
 } 
 records to gs:// 
 { 
 GCS_BUCKET 
 } 
 / 
 { 
 object_key 
 } 
 " 
 ) 
 if 
 newest_time 
 : 
 save_state 
 ( 
 bucket 
 , 
 newest_time 
 ) 
 else 
 : 
 save_state 
 ( 
 bucket 
 , 
 now 
 . 
 isoformat 
 ()) 
 print 
 ( 
 f 
 "Successfully processed 
 { 
 len 
 ( 
 all_records 
 ) 
 } 
 records" 
 ) 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 'Error processing logs: 
 { 
 str 
 ( 
 e 
 ) 
 } 
 ' 
 ) 
 raise 
 def 
  
 fetch_nagios_endpoint 
 ( 
 endpoint 
 , 
 start_ts 
 , 
 end_ts 
 ): 
 base_url 
 = 
 f 
 " 
 { 
 NAGIOS_BASE_URL 
 } 
 /nagiosxi/api/v1/objects/ 
 { 
 endpoint 
 } 
 " 
 records 
 = 
 [] 
 newest_time 
 = 
 None 
 start_index 
 = 
 0 
 page_num 
 = 
 0 
 backoff 
 = 
 1.0 
 while 
 True 
 : 
 page_num 
 += 
 1 
 if 
 len 
 ( 
 records 
 ) 
> = 
 MAX_RECORDS 
 : 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : Reached max_records limit ( 
 { 
 MAX_RECORDS 
 } 
 )" 
 ) 
 break 
 remaining 
 = 
 min 
 ( 
 PAGE_SIZE 
 , 
 MAX_RECORDS 
 - 
 len 
 ( 
 records 
 )) 
 params 
 = 
 [ 
 f 
 "apikey= 
 { 
 NAGIOS_API_KEY 
 } 
 " 
 , 
 f 
 "starttime= 
 { 
 start_ts 
 } 
 " 
 , 
 f 
 "endtime= 
 { 
 end_ts 
 } 
 " 
 , 
 f 
 "records= 
 { 
 remaining 
 } 
 " 
 , 
 f 
 "start= 
 { 
 start_index 
 } 
 " 
 , 
 ] 
 url 
 = 
 f 
 " 
 { 
 base_url 
 } 
 ? 
 { 
 '&' 
 . 
 join 
 ( 
 params 
 ) 
 } 
 " 
 try 
 : 
 response 
 = 
 http 
 . 
 request 
 ( 
 'GET' 
 , 
 url 
 ) 
 if 
 response 
 . 
 status 
 == 
 429 
 : 
 retry_after 
 = 
 int 
 ( 
 response 
 . 
 headers 
 . 
 get 
 ( 
 'Retry-After' 
 , 
 str 
 ( 
 int 
 ( 
 backoff 
 )))) 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : Rate limited (429). Retrying after 
 { 
 retry_after 
 } 
 s..." 
 ) 
 time 
 . 
 sleep 
 ( 
 retry_after 
 ) 
 backoff 
 = 
 min 
 ( 
 backoff 
 * 
 2 
 , 
 30.0 
 ) 
 continue 
 backoff 
 = 
 1.0 
 if 
 response 
 . 
 status 
 != 
 200 
 : 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : HTTP Error 
 { 
 response 
 . 
 status 
 } 
 " 
 ) 
 response_text 
 = 
 response 
 . 
 data 
 . 
 decode 
 ( 
 'utf-8' 
 ) 
 print 
 ( 
 f 
 "Response body: 
 { 
 response_text 
 } 
 " 
 ) 
 break 
 data 
 = 
 json 
 . 
 loads 
 ( 
 response 
 . 
 data 
 . 
 decode 
 ( 
 'utf-8' 
 )) 
 record_count 
 = 
 data 
 . 
 get 
 ( 
 'recordcount' 
 , 
 0 
 ) 
 result_key 
 = 
 get_result_key 
 ( 
 endpoint 
 ) 
 page_results 
 = 
 data 
 . 
 get 
 ( 
 result_key 
 , 
 []) 
 if 
 not 
 page_results 
 : 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : No more results at offset 
 { 
 start_index 
 } 
 " 
 ) 
 break 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 page 
 { 
 page_num 
 } 
 : Retrieved 
 { 
 len 
 ( 
 page_results 
 ) 
 } 
 events" 
 ) 
 records 
 . 
 extend 
 ( 
 page_results 
 ) 
 for 
 event 
 in 
 page_results 
 : 
 try 
 : 
 event_time 
 = 
 event 
 . 
 get 
 ( 
 'state_time' 
 ) 
 or 
 event 
 . 
 get 
 ( 
 'status_update_time' 
 ) 
 or 
 event 
 . 
 get 
 ( 
 'entry_time' 
 ) 
 if 
 event_time 
 : 
 if 
 newest_time 
 is 
 None 
 or 
 event_time 
> newest_time 
 : 
 newest_time 
 = 
 event_time 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 "Warning: Could not parse event time: 
 { 
 e 
 } 
 " 
 ) 
 if 
 len 
 ( 
 page_results 
 ) 
< remaining 
 : 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : Reached last page (returned 
 { 
 len 
 ( 
 page_results 
 ) 
 } 
 < 
 { 
 remaining 
 } 
 )" 
 ) 
 break 
 start_index 
 += 
 len 
 ( 
 page_results 
 ) 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : Error fetching logs: 
 { 
 e 
 } 
 " 
 ) 
 break 
 print 
 ( 
 f 
 " 
 { 
 endpoint 
 } 
 : Retrieved 
 { 
 len 
 ( 
 records 
 ) 
 } 
 total records from 
 { 
 page_num 
 } 
 pages" 
 ) 
 return 
 records 
 , 
 newest_time 
 def 
  
 get_result_key 
 ( 
 endpoint 
 ): 
 key_map 
 = 
 { 
 'hoststatus' 
 : 
 'hoststatus' 
 , 
 'servicestatus' 
 : 
 'servicestatus' 
 , 
 'statehistory' 
 : 
 'statehistory' 
 , 
 'logentries' 
 : 
 'logentry' 
 , 
 } 
 return 
 key_map 
 . 
 get 
 ( 
 endpoint 
 , 
 endpoint 
 ) 
 def 
  
 load_state 
 ( 
 bucket 
 ): 
 try 
 : 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 STATE_KEY 
 ) 
 if 
 blob 
 . 
 exists 
 (): 
 return 
 json 
 . 
 loads 
 ( 
 blob 
 . 
  download_as_text 
 
 ()) 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 "Warning: Could not load state: 
 { 
 e 
 } 
 " 
 ) 
 return 
 {} 
 def 
  
 save_state 
 ( 
 bucket 
 , 
 last_event_time_iso 
 ): 
 try 
 : 
 state 
 = 
 { 
 'last_event_time' 
 : 
 last_event_time_iso 
 , 
 'last_run' 
 : 
 datetime 
 . 
 now 
 ( 
 timezone 
 . 
 utc 
 ) 
 . 
 isoformat 
 () 
 } 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 STATE_KEY 
 ) 
 blob 
 . 
  upload_from_string 
 
 ( 
 json 
 . 
 dumps 
 ( 
 state 
 , 
 indent 
 = 
 2 
 ), 
 content_type 
 = 
 'application/json' 
 ) 
 print 
 ( 
 f 
 "Saved state: last_event_time= 
 { 
 last_event_time_iso 
 } 
 " 
 ) 
 except 
 Exception 
 as 
 e 
 : 
 print 
 ( 
 f 
 "Warning: Could not save state: 
 { 
 e 
 } 
 " 
 )

      • requirements.txt:

         functions-framework==3.*
google-cloud-storage==2.*
urllib3>=2.0.0

    3. Click Deployto save and deploy the function.

    4. Wait for deployment to complete (2-3 minutes).

    Create Cloud Scheduler job

    1. In the GCP Console, go to Cloud Scheduler.
    2. Click Create Job.

    3. Provide the following configuration details:

      Setting Value
      Name nagios-logs-collector-hourly
      Region Select same region as Cloud Run function
      Frequency 0 * * * * (every hour, on the hour)
      Timezone Select timezone (UTC recommended)
      Target type Pub/Sub
      Topic Select nagios-logs-trigger
      Message body {} (empty JSON object)

    4. Click Create.

    Schedule frequency options

    Choose frequency based on log volume and latency requirements:

    Frequency Cron Expression Use Case
    Every 5 minutes
    		 */5 * * * * High-volume, low-latency
    Every 15 minutes
    		 */15 * * * * Medium volume
    Every hour
    		 0 * * * * Standard (recommended)
    Every 6 hours
    		 0 */6 * * * Low volume, batch processing
    Daily
    		 0 0 * * * Historical data collection

    Test the integration

    1. In the Cloud Schedulerconsole, find your job ( nagios-logs-collector-hourly ).
    2. Click Force runto trigger the job manually.
    3. Wait a few seconds.
    4. Go to Cloud Run > Services.
    5. Click on nagios-logs-collector .
    6. Click the Logstab.

    7. Verify the function executed successfully. Look for:

       Fetching logs from YYYY-MM-DDTHH:MM:SS+00:00 to YYYY-MM-DDTHH:MM:SS+00:00
hoststatus page 1: Retrieved X events
servicestatus page 1: Retrieved X events
statehistory page 1: Retrieved X events
logentries page 1: Retrieved X events
Wrote X records to gs://nagios-xi-logs/nagios-xi/nagios_logs_YYYYMMDD_HHMMSS.ndjson
Successfully processed X records

    8. Go to Cloud Storage > Buckets.

    9. Click on nagios-xi-logs .

    10. Navigate to the nagios-xi/ folder.

    11. Verify that a new .ndjson file was created with the current timestamp.

    If you see errors in the logs:

    • HTTP 401: Verify the NAGIOS_API_KEY environment variable is correct and the user has API accessenabled
    • HTTP 403: Verify the user account has Can see all hosts and servicespermission
    • HTTP 429: Rate limiting -- the function will automatically retry with backoff
    • Missing environment variables: Verify all required variables are set in the Cloud Run function configuration
    1. Go to SIEM Settings > Feeds.
    2. Click Add New Feed.
    3. Click Configure a single feed.
    4. In the Feed namefield, enter a name for the feed (for example, Nagios XI Logs GCS ).
    5. Select Google Cloud Storage V2as the Source type.
    6. Select Nagiosas the Log type.
    7. Click Get Service Account.

    8. A unique service account email is displayed. For example:

       chronicle-12345678@chronicle-gcp-prod.iam.gserviceaccount.com

    9. Copy this email address for use in the next step.

    10. Click Next.

    11. Specify values for the following input parameters:

      • Storage bucket URL: Enter the GCS bucket URI with the prefix path:

         gs://nagios-xi-logs/nagios-xi/

      • Source deletion option: Select the deletion option according to your preference:

        • Never: Never deletes any files after transfers (recommended for testing).
        • Delete transferred files: Deletes files after successful transfer.

        • Delete transferred files and empty directories: Deletes files and empty directories after successful transfer.

      • Maximum File Age: Include files modified in the last number of days (default is 180 days)

      • Asset namespace: The asset namespace

      • Ingestion labels: The label to be applied to the events from this feed

    12. Click Next.

    13. Review your new feed configuration in the Finalizescreen, and then click Submit.

    1. Go to Cloud Storage > Buckets.
    2. Click on nagios-xi-logs .
    3. Go to the Permissionstab.
    4. Click Grant access.
    5. Provide the following configuration details:
      • Add principals: Paste the Google SecOps service account email
      • Assign roles: Select Storage Object Viewer

    6. Click Save.

    UDM mapping table

    Log Field UDM Mapping Logic
    src_ip
    		 has_principal Set to "true" if merge of src_ip to principal.ip and principal.asset.ip succeeds
    src_ip
    		 principal.asset.ip Value copied directly
    src_ip
    		 principal.ip Value copied directly
    jobid
    		 jobid_label.key Set to "Jobid"
    jobid
    		 jobid_label.value Value copied directly
    jobid_label
    		 principal.resource.attribute.labels Merged from jobid_label
    pid
    		 principal.process.pid Value copied directly
    ent
    		 metadata.product_event_type Value copied directly
    description
    		 metadata.description Value copied directly
    msg_ip
    		 has_target Set to "true" if merge of msg_ip to target.ip and target.asset.ip succeeds
    msg_ip
    		 target.asset.ip Value copied directly
    msg_ip
    		 target.ip Value copied directly
    port
    		 target.port Value copied directly and converted to integer
    column1
    		 principal.asset.hostname Value from column1 if ent == "SERVICE ALERT", else from column2 if ent == "SERVICE NOTIFICATION"
    column1
    		 principal.hostname Value from column1 if ent == "SERVICE ALERT", else from column2 if ent == "SERVICE NOTIFICATION"
    column1
    		 principal.user.user_display_name Value copied directly if ent == "SERVICE NOTIFICATION"
    column2
    		 security_result.summary Value from column3 if ent == "SERVICE ALERT" and column2 not empty, else from column3 if ent == "SERVICE NOTIFICATION"
    column3
    		 security_result.summary Value from column3 if ent == "SERVICE ALERT" and column3 not empty, else from column3 if ent == "SERVICE NOTIFICATION"
    column4
    		 security_result.severity Value copied directly if column4 in ["LOW", "MEDIUM", "HIGH", "CRITICAL"] and ent in ["SERVICE NOTIFICATION", "SERVICE ALERT"]
    column4
    		 security_result.severity_details Value copied directly if column4 not in ["LOW", "MEDIUM", "HIGH", "CRITICAL"] and ent in ["SERVICE NOTIFICATION", "SERVICE ALERT"]
    has_principal
    		 metadata.event_type Set to "NETWORK_CONNECTION" if has_principal and has_target true, else "STATUS_UPDATE" if has_principal true, else "USER_UNCATEGORIZED" if has_principal_user true, else "GENERIC_EVENT"
    has_target
    		 metadata.event_type
    has_principal_user
    		 metadata.event_type
    security_result
    		 event.idm.read_only_udm.security_result Merged from security_result
    metadata
    		 event.idm.read_only_udm.metadata Renamed from metadata
    target
    		 event.idm.read_only_udm.target Renamed from target
    principal
    		 event.idm.read_only_udm.principal Renamed from principal
    network
    		 event.idm.read_only_udm.network Renamed from network
    metadata.product_name
    		 metadata.product_name Set to "NAGIOS"
    metadata.vendor_name
    		 metadata.vendor_name Set to "NAGIOS"

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