homelab-nomad/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"
port = "main"
connect {
sidecar_service {
proxy {
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local_service_port = 1514
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upstreams {
destination_name = "loki"
local_bind_port = 1000
}
}
}
sidecar_task {
resources {
cpu = 50
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memory = 20
memory_max = 50
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}
}
}
}
task "promtail" {
driver = "docker"
config {
image = "grafana/promtail:2.2.1"
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:
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- url: http://{{ env "NOMAD_UPSTREAM_ADDR_loki" }}/loki/api/v1/push
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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
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memory = 20
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}
}
}
group "syslogng" {
count = 1
constraint {
attribute = "${node.unique.name}"
# Needs to be on a predictable node for routing
# Maybe a loadbalancer could be used for routing from any node
value = "n2"
}
network {
mode = "bridge"
port "main" {
static = 1514
}
}
service {
name = "syslogng"
port = "main"
connect {
sidecar_service {
proxy {
upstreams {
destination_name = "syslogng-promtail"
local_bind_port = 1000
}
}
}
sidecar_task {
resources {
cpu = 50
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memory = 20
memory_max = 50
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}
}
}
}
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: 3.22
source s_external {
syslog(ip(0.0.0.0) port(1514) transport("tcp"));
syslog(ip(0.0.0.0) port(1514) transport("udp"));
};
source s_internal {
internal();
};
destination d_loki {
# Forward to Connect proxy to Promtail
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syslog("{{ env "NOMAD_UPSTREAM_IP_syslogng-promtail" }}" transport("tcp") port({{ env "NOMAD_UPSTREAM_PORT_syslogng-promtail" }}));
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};
log { source(s_internal); destination(d_loki); };
log { source(s_external); destination(d_loki); };
EOF
destination = "local/syslog-ng.conf"
}
resources {
cpu = 50
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memory = 10
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}
}
}
}