LibreNMS Distributed Poller on Low-end Server Resources

1pip3 install -r requirements.txt

 1server {
 2    listen 80;
 3    listen 443 ssl http2;
 4    server_name nmshostname.ditatompel.com;
 5    error_log  /var/log/nginx/nmshostname.ditatompel.com;
 6    if ($scheme = http) {
 7        return 301 https://$server_name$request_uri;
 8    }
 9    
10    # set your ssl certificates
11    ssl_certificate /path/to/ssl/cert/nmshostname.ditatompel.com/fullchain.pem;
12    ssl_certificate_key /path/to/ssl/cert/nmshostname.ditatompel.com/privkey.pem;
13    
14    # This SSL config below that can be included in separaded file
15    ssl_dhparam /path/to/ssl/dhparam.pem;
16    ssl_session_timeout 1d;
17    ssl_session_cache shared:SSL:10m;
18    ssl_session_tickets off;
19    ssl_protocols TLSv1.2 TLSv1.3;
20    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
21    ssl_prefer_server_ciphers off;
22
23    # HSTS (ngx_http_headers_module is required) (63072000 seconds)
24    add_header Strict-Transport-Security 'max-age=63072000; includeSubDomains; preload';
25
26    add_header X-Frame-Options "SAMEORIGIN";
27    add_header X-Permitted-Cross-Domain-Policies none;
28    add_header X-Content-Type-Options nosniff;
29    add_header X-XSS-Protection "1; mode=block";
30    add_header X-Download-Options noopen;
31    # End of SSL config that can be included in separaded file
32
33    root        /opt/librenms/html;
34    index       index.php;
35
36    charset utf-8;
37    gzip on;
38    gzip_types text/css application/javascript text/javascript application/x-javascript image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon;
39    location / {
40        try_files $uri $uri/ /index.php?$query_string;
41    }
42    location /api/v0 {
43        try_files $uri $uri/ /api_v0.php?$query_string;
44    }
45    location ~ \.php {
46        include fastcgi.conf;
47        fastcgi_split_path_info ^(.+\.php)(/.+)$;
48        fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
49    }
50    location ~ /\.ht {
51        deny all;
52    }
53}

1apt install rrdcached

 1DAEMON=/usr/bin/rrdcached
 2WRITE_THREADS=4
 3BASE_PATH=/opt/librenms/rrd/
 4JOURNAL_PATH=/var/lib/rrdcached/journal/
 5PIDFILE=/var/run/rrdcached.pid
 6SOCKFILE=/var/run/rrdcached.sock
 7SOCKGROUP=librenms
 8DAEMON_GROUP=librenms
 9DAEMON_USER=librenms
10NETWORK_OPTIONS="-L"
11BASE_OPTIONS="-B -F -R"

1chown librenms:librenms /var/lib/rrdcached/journal/

 1# memcached default config file
 2# 2003 - Jay Bonci <[email protected]>
 3# This configuration file is read by the start-memcached script provided as
 4# part of the Debian GNU/Linux distribution.
 5
 6# Run memcached as a daemon. This command is implied, and is not needed for the
 7# daemon to run. See the README.Debian that comes with this package for more
 8# information.
 9-d
10
11# Log memcached's output to /var/log/memcached
12logfile /var/log/memcached.log
13
14# Be verbose
15# -v
16
17# Be even more verbose (print client commands as well)
18# -vv
19
20# Start with a cap of 64 megs of memory. It's reasonable, and the daemon default
21# Note that the daemon will grow to this size, but does not start out holding this much
22# memory
23-m 64
24
25# Default connection port is 11211
26-p 11211
27
28# Run the daemon as root. The start-memcached will default to running as root if no
29# -u command is present in this config file
30-u memcache
31
32# Specify which IP address to listen on. The default is to listen on all IP addresses
33# This parameter is one of the only security measures that memcached has, so make sure
34# it's listening on a firewalled interface.
35#-l 127.0.0.1
36-l 0.0.0.0
37
38# Limit the number of simultaneous incoming connections. The daemon default is 1024
39# -c 1024
40
41# Lock down all paged memory. Consult with the README and homepage before you do this
42# -k
43
44# Return error when memory is exhausted (rather than removing items)
45# -M
46
47# Maximize core file limit
48# -r
49
50# Use a pidfile
51-P /var/run/memcached/memcached.pid

1add-apt-repository ppa:chris-lea/redis-server
2apt install redis-server

1bind 0.0.0.0
2requirepass YOURSCRETREDISPASSWORD

 1#APP_KEY=   #Required, generated by composer install
 2
 3DB_HOST=[YOUR_DATABASE_HOST]
 4DB_DATABASE=[YOUR_DATABASE_NAME]
 5DB_USERNAME=[YOUR_DATABASE_USER]
 6DB_PASSWORD=[YOUR_DATABASE_PASS]
 7
 8#NODE_ID=   #Required, generated by composer install
 9LIBRENMS_USER=librenms
10
11# Distributed Polling
12REDIS_HOST=[YOUR_REDIS_HOST_IP]
13REDIS_PORT=6379
14REDIS_PASSWORD=[YOURSCRETREDISPASSWORD]
15REDIS_DB=4
16CACHE_DRIVER=redis

 1<?php
 2
 3$config['distributed_poller']                    = true;
 4$config['distributed_poller_name']               = php_uname('n');
 5$config['distributed_poller_group']              = '0'; # Set this to your prefered group for each node
 6
 7$config['distributed_poller_memcached_host'] = "[IP_ADDR_OF_MEMCACHED_SERVER]";
 8$config['distributed_poller_memcached_port'] = 11211;
 9
10
11$config['service_poller_workers']              = 24;     # Processes spawned for polling
12$config['service_services_workers']            = 8;      # Processes spawned for service polling
13$config['service_discovery_workers']           = 16;     # Processes spawned for discovery
14
15
16//Optional Settings
17#$config['service_poller_frequency']            = 300;    # Seconds between polling attempts
18#$config['service_services_frequency']          = 300;    # Seconds between service polling attempts
19#$config['service_discovery_frequency']         = 21600;  # Seconds between discovery runs
20#$config['service_billing_frequency']           = 300;    # Seconds between billing calculations
21#$config['service_billing_calculate_frequency'] = 60;     # Billing interval
22#$config['service_poller_down_retry']           = 60;     # Seconds between failed polling attempts
23#$config['service_loglevel']                    = 'WARNING'; # Must be one of 'DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'
24#$config['service_update_frequency']            = 86400;  # Seconds between LibreNMS update checks
25
26$config['service_watchdog_enabled'] = true;