I can not see debug messages from influx. The rest is a long description of my setup but it all boils down to that simple question.
Anyhow, newie here, so it might be something obvious.
I have telegraf and influx on the same machine along with a mosquitto brocker.
telegraf is acquiring data and sending it two two different outputs one of them influx
This is the configuration…
[agent]
## Default data collection interval for all inputs
interval = "1s"
debug = true
[[inputs.mqtt_consumer]]
servers = ["tcp://localhost:1883"]
topics = ["some/nice/topic"]
data_format = "json_v2"
client_id = "telegraf32"
[[inputs.mqtt_consumer.json_v2]]
[[inputs.mqtt_consumer.json_v2.object]]
path = "@this"
timestamp_key = "Time"
timestamp_format = "unix_ms"
[[outputs.influxdb_v2]]
urls = ["http://localhost:8086"]
bucket = "topic-mqtt"
organization = "Org"
token = "mytoken=="
[[outputs.file]]
files = ["stdout"]
As you can see it telegraf is in debug mode, and I get debug information with journalct along with the outgoing data. Here is a small snip of the output. The most relevant is
Wrote batch of 10 metrics in 165.145847ms referring to the influx output.
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=-0.5,Sin=-0.866025403784438,Sin2=-0.0151144191721904 1750690478869710000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=-0.939692620785908,Sin=0.342020143325669,Sin2=0.00596934215763363 1750690479862760000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=0.17364817766693,Sin=0.984807753012208,Sin2=0.0171872914805132 1750690480863610000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=1,Sin=0,Sin2=0 1750690481863300000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=0.17364817766693,Sin=-0.984807753012208,Sin2=-0.0171872914805132 1750690482873310000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=-0.939692620785908,Sin=-0.342020143325669,Sin2=-0.00596934215763341 1750690483870010000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=-0.5,Sin=0.866025403784439,Sin2=0.0151144191721906 1750690484869420000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=0.766044443118978,Sin=0.642787609686539,Sin2=0.0112185248482581 1750690485870550000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=0.766044443118978,Sin=-0.64278760968654,Sin2=-0.0112185248482585 1750690486866680000
Jun 23 14:54:48 DevMachine telegraf[11017]: mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=-0.5,Sin=-0.866025403784438,Sin2=-0.0151144191721904 1750690487863140000
Jun 23 14:54:48 DevMachine telegraf[11017]: 2025-06-23T12:54:48Z D! [outputs.file] Wrote batch of 10 metrics in 325.22µs
Jun 23 14:54:48 DevMachine telegraf[11017]: 2025-06-23T12:54:48Z D! [outputs.file] Buffer fullness: 0 / 10000 metrics
Jun 23 14:54:57 DevMachine telegraf[11017]: 2025-06-23T12:54:57Z D! [outputs.influxdb_v2] Wrote batch of 10 metrics in 165.145847ms
Jun 23 14:54:57 DevMachine telegraf[11017]: 2025-06-23T12:54:57Z D! [outputs.influxdb_v2] Buffer fullness: 0 / 10000 metrics
On the influx side of things, even if I did enable debug in the configuration file, I don’t see anything logged with journalctl
This is my very simple config from influx server-config
user@DevMachine:~$ influx server-config
{
"assets-path": "",
"bolt-path": "/var/lib/influxdb/influxd.bolt",
"e2e-testing": false,
"engine-path": "/var/lib/influxdb/engine",
"feature-flags": null,
"flux-log-enabled": false,
"hardening-enabled": false,
"http-bind-address": ":8086",
"http-idle-timeout": 180000000000,
"http-read-header-timeout": 10000000000,
"http-read-timeout": 0,
"http-write-timeout": 0,
"influxql-max-select-buckets": 0,
"influxql-max-select-point": 0,
"influxql-max-select-series": 0,
"instance-id": "",
"log-level": "debug",
"metrics-disabled": false,
"nats-max-payload-bytes": 0,
"nats-port": 0,
"no-tasks": false,
"overwrite-pid-file": false,
"pid-file": "",
"pprof-disabled": false,
"query-concurrency": 1024,
"query-initial-memory-bytes": 0,
"query-max-memory-bytes": 0,
"query-memory-bytes": 0,
"query-queue-size": 1024,
"reporting-disabled": false,
"secret-store": "bolt",
"session-length": 60,
"session-renew-disabled": false,
"sqlite-path": "/var/lib/influxdb/influxd.sqlite",
"storage-cache-max-memory-size": 1073741824,
"storage-cache-snapshot-memory-size": 26214400,
"storage-cache-snapshot-write-cold-duration": "10m0s",
"storage-compact-full-write-cold-duration": "4h0m0s",
"storage-compact-throughput-burst": 50331648,
"storage-max-concurrent-compactions": 0,
"storage-max-index-log-file-size": 1048576,
"storage-no-validate-field-size": false,
"storage-retention-check-interval": "30m0s",
"storage-series-file-max-concurrent-snapshot-compactions": 0,
"storage-series-id-set-cache-size": 0,
"storage-shard-precreator-advance-period": "30m0s",
"storage-shard-precreator-check-interval": "10m0s",
"storage-tsm-use-madv-willneed": false,
"storage-validate-keys": false,
"storage-wal-flush-on-shutdown": false,
"storage-wal-fsync-delay": "0s",
"storage-wal-max-concurrent-writes": 0,
"storage-wal-max-write-delay": 600000000000,
"storage-write-timeout": 10000000000,
"store": "disk",
"strong-passwords": false,
"template-file-urls-disabled": false,
"testing-always-allow-setup": false,
"tls-cert": "",
"tls-key": "",
"tls-min-version": "1.2",
"tls-strict-ciphers": false,
"tracing-type": "",
"ui-disabled": false,
"vault-addr": "",
"vault-cacert": "",
"vault-capath": "",
"vault-client-cert": "",
"vault-client-key": "",
"vault-client-timeout": 0,
"vault-max-retries": 0,
"vault-skip-verify": false,
"vault-tls-server-name": "",
"vault-token": ""
}
So at this point I a completely puzzled. I don’t see any entries in the influx journal related to the telegraf output, and I have no clue how to see any debug information from influx. I have also attempted to use the influx tool to test the telegraf output, I get the error with invalid data, but no error when using the telegraf output, so I want to assume that influx ingested it.
user@DevMachine:~$ influx write --bucket topic-mqtt "asa"
Error: failed to write data: 400 Bad Request: unable to parse 'asa': missing fields
user@DevMachine:~$ influx write --bucket topic-mqtt mqtt_consumer,host=DevMachine,topic=some/nice/topic Cos=0.766044443118978,Sin=-0.64278760968654,Sin2=-0.0112185248482585 1750690486866680000"
Also I don’t see anything using journalctl -u influxdb output
Any hints or a piece of advice that could get me debug this?
Any idea where the debug info might be going?
Thanks in advance
