Add `systemd` files for `snmp_exporter` and `vector-snmp_exporter`

cookbooks/prometheus/files/etc/systemd/system/vector-snmp_exporter.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Vector SNMP Exporter
+Documentation=https://vector.dev
+After=network-online.target
+Requires=network-online.target
+
+[Service]
+ExecStart=/usr/bin/vector --config /etc/vector/snmp_exporter.toml
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=always
+StandardOutput=syslog
+StandardError=syslog
+SyslogIdentifier=vector
+
+[Install]
+WantedBy=multi-user.target
+

cookbooks/prometheus/files/etc/vector/snmp_exporter.toml

@@ -0,0 +1,54 @@
+data_dir = "/var/lib/vector/"
+
+[sources.snmp_exporter]
+  type = "file"
+  include = [ "/var/log/snmp_exporter.log" ]
+  ignore_older_secs = 600
+  read_from = "beginning"
+
+[transforms.snmp_exporter_transform]
+  type = "remap"
+  inputs = ["snmp_exporter"]
+  source = '''
+    . |= parse_syslog!(.message)
+
+    . |= parse_key_value!(.message)
+
+    del(.message)
+    del(.host)
+
+    .message = .msg
+    del(.msg)
+  '''
+
+[sinks.snmp_exporter_output]
+type = "file"
+inputs = [ "snmp_exporter_transform" ]
+compression = "none"
+path = "/tmp/snmp_exporter-%Y-%m-%d.log"
+
+  [sinks.snmp_exporter_output.encoding]
+  codec = "json"
+
+  [sinks.snmp_exporter_output.buffer]
+  max_size = 268435488
+  type = "disk"
+
+[sinks.snmp_exporter_loki]
+type = "loki"
+inputs = [ "snmp_exporter_transform" ]
+endpoint = "http://loki.service.consul:3100"
+compression = "snappy"
+
+  [sinks.snmp_exporter_loki.labels]
+  level = "{{ level }}"
+  hostname = "{{ hostname }}"
+  job = "snmp_exporter"
+  filename = "/var/log/snmp_exporter.log"
+
+  [sinks.snmp_exporter_loki.encoding]
+  codec = "json"
+
+  [sinks.snmp_exporter_loki.buffer]
+  max_size = 268435488
+  type = "disk"

cookbooks/prometheus/snmp_exporter_setup.rb

@@ -34,6 +34,23 @@ remote_file '/etc/logrotate.d/snmp_exporter' do
   mode   '644'
 end
 
+# Deploy `vector` config for `snmp_exporter`:
+remote_file '/etc/vector/snmp_exporter.toml' do
+  owner  'root'
+  group  'root'
+  mode   '644'
+end
+
+remote_file '/etc/systemd/system/vector-snmp_exporter.service' do
+  owner 'root'
+  group 'root'
+  mode  '0644'
+end
+
+service 'vector-snmp_exporter' do
+  action [:enable, :start]
+end
+
 # Deploy `consul` config:
 remote_file '/etc/consul.d/service-snmp_exporter.json' do
   owner  'consul'