From c11c3544abd9ec2702c61b7ae114270791a57371 Mon Sep 17 00:00:00 2001
From: makefu <github@syntax-fehler.de>
Date: Wed, 25 Sep 2019 14:01:32 +0200
Subject: ma logging: init server

---
 makefu/2configs/logging/filter/dnsmasq.conf |  19 +++++
 makefu/2configs/logging/patterns/dnsmasq    |  15 ++++
 makefu/2configs/logging/server.nix          | 123 +++++++++++++++++++++++++++-
 3 files changed, 154 insertions(+), 3 deletions(-)
 create mode 100644 makefu/2configs/logging/filter/dnsmasq.conf
 create mode 100644 makefu/2configs/logging/patterns/dnsmasq

(limited to 'makefu')

diff --git a/makefu/2configs/logging/filter/dnsmasq.conf b/makefu/2configs/logging/filter/dnsmasq.conf
new file mode 100644
index 00000000..1570b1c6
--- /dev/null
+++ b/makefu/2configs/logging/filter/dnsmasq.conf
@@ -0,0 +1,19 @@
+
+if ( [program] == "dnsmasq") {
+    grok {
+        patterns_dir => ["${./patterns}"]
+        match => {
+          "message" => [
+              "^%{logdate:LOGDATE} dnsmasq\[[\d]+\]\: query\[[\w]+\] %{domain:DOMAIN} from %{clientip:CLIENTIP}"
+            , "^%{logdate:LOGDATE} dnsmasq\[[\d]+\]\: reply %{domain:DOMAIN} is %{ip:IP}"
+            , "^%{logdate:LOGDATE} dnsmasq\[[\d]+\]\: %{blocklist:BLOCKLIST} %{domain:DOMAIN} is %{ip:IP}"
+          ]
+        }
+    }
+    date {
+      match => [ "LOGDATE", "MMM dd HH:mm:ss", "MMM  d HH:mm:ss", "ISO8601" ]
+    }
+    geoip {
+      source => "IP"
+    }
+}
diff --git a/makefu/2configs/logging/patterns/dnsmasq b/makefu/2configs/logging/patterns/dnsmasq
new file mode 100644
index 00000000..c1e700d5
--- /dev/null
+++ b/makefu/2configs/logging/patterns/dnsmasq
@@ -0,0 +1,15 @@
+BLOCKLIST [\/\w\.]+
+DOMAIN [\w\.\-]+
+DNSID \d+
+PORT \d+
+DNSRESPONSE cached|reply|forwarded|query
+# TODO: there are some strange responses for certain queries like <CNAME> or ...
+IPORWORD %{IP}|[<>\.\/\w>]+
+
+# TODO use public suffix list by mozilla
+TLD [a-z]{2,63}
+# matches CCSLD and TLD together (e.g. co.uk )
+CCSLD_TLD [a-z]+\.uk
+# actually after a CCTLD this would be the third level domain ...
+PUBLIC_SUFFIX (xn--)?%{FUNCTIONAL_SLD}\.(%{CCSLD_TLD}|%{TLD})
+FUNCTIONAL_SLD [a-z0-9-]{1,63}
diff --git a/makefu/2configs/logging/server.nix b/makefu/2configs/logging/server.nix
index 90f8e668..f2fccec2 100644
--- a/makefu/2configs/logging/server.nix
+++ b/makefu/2configs/logging/server.nix
@@ -1,18 +1,29 @@
 {pkgs, config, ...}:
 
-with import <stockholm/lib>;
 let
   es-port = 9200;
   kibana-port = 5601;
+  primaryName = "log.${config.krebs.build.host.name}";
+  serverAliases = [ "${primaryName}.r" "${primaryName}.lan" ];
 in {
+
+  services.nginx.virtualHosts.${primaryName} = {
+    inherit serverAliases;
+    locations."/" =  {
+      proxyPass = "http://localhost:5601/";
+      extraConfig = ''
+          proxy_set_header   Host $host;
+          proxy_set_header   X-Real-IP          $remote_addr;
+          proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+      '';
+    };
+  };
   services.elasticsearch = {
     enable = true;
-    listenAddress = "0.0.0.0";
     port = es-port;
   };
   services.kibana = {
     enable = true;
-    listenAddress = "0.0.0.0";
     port = kibana-port;
   };
 
@@ -20,4 +31,110 @@ in {
     iptables -A INPUT -i retiolum -p tcp --dport ${toString es-port} -j ACCEPT
     iptables -A INPUT -i retiolum -p tcp --dport ${toString kibana-port} -j ACCEPT
   '';
+
+  # send logs directly to elasticsearch
+  services.journalbeat = {
+    enable = true;
+    package = pkgs.journalbeat7;
+    extraConfig = ''
+      logging:
+        to_syslog: true
+        level: info
+        metrics.enabled: false
+        template.enabled: false
+      output.logstash:
+        hosts: [ "127.0.0.1:5044" ]
+        template.enabled: false
+        index: journalbeat
+      journalbeat.inputs:
+      - paths: []
+        seek: cursor
+    '';
+  };
+
+  services.logstash = {
+    enable = true;
+    # package = pkgs.logstash5;
+    # plugins = [ pkgs.logstash-contrib ];
+    inputConfig =
+    ''
+      syslog {
+        timezone => "Etc/UTC"
+      }
+      beats {
+        port => 5044
+      }
+    '';
+    filterConfig =
+    ''
+      # Assume Beats
+      if [syslog] {
+        mutate {
+          add_field => { "program" => "%{[syslog][identifier]}" }
+        }
+      }
+    '' +
+    ''
+    if ![program] {
+      mutate {
+        add_field => { "program" => "unknown" }
+      }
+    }
+    '' +
+    ''
+      if ([program] == "logstash") {
+        drop {}
+      }
+    '' +
+    ''
+    if ( [program] == "dnsmasq") {
+        grok {
+            patterns_dir => ["${./patterns}"]
+            match => {
+              "message" => [
+                  "^%{DNSID:dnsid} %{IP:client}/%{PORT} %{DNSRESPONSE:dnstype}\[[\w]+\] %{DOMAIN:domain} from %{IP}"
+                , "^%{DNSID:dnsid} %{IP:client}/%{PORT} %{DNSRESPONSE:dnstype} %{DOMAIN:domain} is %{IPORWORD:resolved_ip}"
+                , "^%{DNSID:dnsid} %{IP:client}/%{PORT} %{DNSRESPONSE:dnstype} %{DOMAIN:domain} to %{IP:upstream_dns}"
+              ]
+            }
+        }
+        if [resolved_ip] {
+          geoip {
+            source => "resolved_ip"
+          }
+        }
+        mutate {
+          rename => { "host" => "syslog_host" }
+        }
+        # Target is to parse the the first and second significant part of the domain
+        grok {
+          patterns_dir => ["${./patterns}"]
+          match => { "domain" => [ "%{PUBLIC_SUFFIX:dns_suffix}$" ] }
+        }
+        if [client] {
+          mutate { copy => { "client" => "clientip" } }
+          dns {
+            reverse => [ "client"]
+            action => "replace"
+            hostsfile => [ "/etc/hosts" ]
+            hit_cache_ttl => 1600
+            failed_cache_ttl => 60
+          }
+        }
+    }
+  '' + ''
+    if ( [program] == "proftpd") {
+      kv {
+        field_split => "  "
+      }
+    }
+    '';
+    outputConfig = 
+    ''
+      #stdout {
+      #  codec => rubydebug
+      #}
+      elasticsearch { }
+    '';
+  };
 }
-- 
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