homelab-nomad/core/syslogng.nomad

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job "syslogng" {
datacenters = ["dc1"]
type = "service"
group "promtail" {
count = 1
network {
mode = "bridge"
port "main" {
to = 1514
}
port "metrics" {
to = 9080
}
}
service {
name = "syslogng-promtail"
provider = "nomad"
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port = "main"
}
task "promtail" {
driver = "docker"
meta = {
"diun.watch_repo" = true
}
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config {
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image = "grafana/promtail:3.3.0"
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ports = ["main", "metrics"]
args = ["--config.file=/etc/promtail/promtail.yml"]
mount {
type = "bind"
target = "/etc/promtail/promtail.yml"
source = "local/promtail.yml"
}
}
template {
data = <<EOF
---
server:
http_listen_address: 0.0.0.0
http_listen_port: 9080
clients:
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "loki" -}}
- url: http://{{ .Address }}:{{ .Port }}/loki/api/v1/push
{{- end }}
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scrape_configs:
# TCP syslog receiver
- job_name: syslog
syslog:
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listen_address: 0.0.0.0:{{ env "NOMAD_PORT_main" }}
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labels:
job: syslog
relabel_configs:
- source_labels: ['__syslog_message_hostname']
target_label: hostname
EOF
destination = "local/promtail.yml"
}
resources {
cpu = 50
memory = 50
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}
}
}
group "syslogng" {
count = 1
network {
mode = "bridge"
port "main" {
to = 514
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}
}
service {
name = "syslogng"
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provider = "nomad"
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port = "main"
}
task "syslogng" {
driver = "docker"
config {
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image = "balabit/syslog-ng:3.37.1"
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ports = ["main"]
args = ["--no-caps"]
mount {
type = "bind"
target = "/etc/syslog-ng/syslog-ng.conf"
source = "local/syslog-ng.conf"
}
}
template {
data = <<EOF
@version: 3.37
@include "scl.conf"
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source s_network {
default-network-drivers(
);
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};
source s_internal {
internal();
};
destination d_loki {
{{ range nomadService 1 (env "NOMAD_ALLOC_ID") "syslogng-promtail" -}}
syslog("{{ .Address }}" transport("tcp") port({{ .Port }}));
{{- end }}
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};
log { source(s_internal); destination(d_loki); };
log { source(s_network); destination(d_loki); };
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EOF
destination = "local/syslog-ng.conf"
}
resources {
cpu = 50
memory = 50
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}
}
}
}