{%- if grains.get('init') == 'systemd' %}
agent:
  plugin:
    fluent-plugin-systemd:
      gem: ['fluent-plugin-systemd']
  config:
    label:
      default_metric:
        filter:
          metric_failed_user:
            tag: metric.failed_user
            type: prometheus
            metric:
              - name: failed_logins_total
                type: counter
                desc: The total number of failed logins.
            label:
              - name: host
                value: ${Hostname}
          metric_out_of_memory:
            tag: metric.out_of_memory
            type: prometheus
            metric:
              - name: out_of_memory_total
                type: counter
                desc: The total number of OOM.
            label:
              - name: host
                value: ${Hostname}
          metric_hdd_errors_parse:
            tag: metric.hdd_errors
            type: parser
            key_name: Payload
            parser:
              type: regexp
              format: '/(?<device>[sv]d[a-z]+\d*)/'
          metric_hdd_errors:
            tag: metric.hdd_errors
            require:
              - metric_hdd_errors_parse
            type: prometheus
            metric:
              - name: hdd_errors_total
                type: counter
                desc: The total number of hdd errors.
            label:
              - name: host
                value: ${Hostname}
              - name: device
                value: ${device}
      systemd:
        input:
          systemd:
            type: systemd
            tag: systemd.source
            path: /run/log/journal
            pos_file: {{ pillar.fluentd.agent.dir.positiondb }}/systemd.source.pos
            entry:
              field_map:
                MESSAGE: 'Payload'
                _CMDLINE: 'process'
                _PID: 'Pid'
                _COMM: 'programname'
                _SYSTEMD_UNIT: 'service'
                syslog_identifier: 'ident'
                priority: 'Severity'
              field_map_strict: True
              fields_strip_underscores: True
              fields_lowercase: True
        filter:
          add_severity_label:
            tag: systemd.source
            type: record_transformer
            enable_ruby: true
            record:
              - name: severity_label
                value: '${ {"TRACE"=>8,"DEBUG"=>7,"INFO"=>6,"NOTICE"=>5,"WARNING"=>4,"ERROR"=>3,"CRITICAL"=>2,"ALERT"=>1,"EMERGENCY"=>0}.key(record["Severity"].to_i) }'
        match:
          rewrite_tag:
            tag: systemd.source
            type: rewrite_tag_filter
            rule:
              - name: ident
                regexp: '^(.*)$'
                result: __TAG__.$1
          push_to_default:
            tag: 'systemd.source.*'
            type: copy
            store:
              - type: relabel
                label: default_output
              - type: rewrite_tag_filter
                rule:
                  - name: Payload
                    regexp: '^Invalid user'
                    result: metric.failed_user
                  - name: Payload
                    regexp: '^Out of memory'
                    result: metric.out_of_memory
                  - name: Payload
                    regexp: >-
                      'error.+[sv]d[a-z]+\d*'
                    result: metric.hdd_errors
                  - name: Payload
                    regexp: >-
                      '[sv]d[a-z]+\d*.+error'
                    result: metric.hdd_errors
          push_to_metric:
            tag: 'metric.**'
            type: relabel
            label: default_metric
{%- endif %}