[Feat]: rspamd monitoring with netdata about netdata

[ilyam8]

Hi, @ekexcello.

• Can you provide more info? I don't understand "Value proposition" - what do these paths (/a/b/c/d) mean? Metrics?
• And "Proposed implementation" - can you elaborate? What do you mean by "taken from rspamd web interface"? Is there an endpoint that exposes metrics? Can you provide a link to the documentation? And share a sample of metrics?

I see that rspamd has built-in Prometheus exporter. Do you use it?

[ilyam8]

I see that it has /stat endpoint

Sample statistics response from an idle instance (no workload)

{
    "version": "3.4",
    "config_id": "gkwm3ysiqrx96kj1mwnfashx9hkypj833w1tgjaw4nysgwwxqthh7q78hyrezi9gzamke3n9ea7u8cjrzru7i5p4z7r9xhcoitjpjyy",
    "uptime": 717,
    "read_only": false,
    "scanned": 0,
    "learned": 0,
    "actions": {
        "reject": 0,
        "soft reject": 0,
        "rewrite subject": 0,
        "add header": 0,
        "greylist": 0,
        "no action": 0
    },
    "scan_times": [],
    "spam_count": 0,
    "ham_count": 0,
    "connections": 0,
    "control_connections": 109,
    "pools_allocated": 176,
    "pools_freed": 139,
    "bytes_allocated": 28807300,
    "chunks_allocated": 282,
    "shared_chunks_allocated": 4,
    "chunks_freed": 0,
    "chunks_oversized": 2,
    "fragmented": 0,
    "total_learns": 0,
    "statfiles": [],
    "fuzzy_hashes": {
        "rspamd.com": 446607461
    }
}

[ilyam8]

@ekexcello I added the following metrics (as rates):

    "scanned": 0,
    "learned": 0,
    "actions": {
        "reject": 0,
        "soft reject": 0,
        "rewrite subject": 0,
        "add header": 0,
        "greylist": 0,
        "no action": 0
    },
    "spam_count": 0,
    "ham_count": 0,
    "connections": 0,
    "control_connections": 109,