SNMP Docker-compose stack

[Parthey Khanderia]

I am trying to monitor some brocade vdx switches using snmp exporter. I understand the concept of snmp exporter and generator but I can't seem to figure out what I need in my docker-compose file.

SO far I have

Docker-compose .yml

image: prom/prometheus

ports:

- 9990:9090

networks:

- public

volumes:

- prometheus_data:/prometheus

- ./prometheus/:/etc/prometheus/

command:

- '--config.file=/etc/prometheus/prometheus.yml'

depends_on:

- snmp-exporter

snmp-exporter:

image: prom/snmp-exporter

volumes:

- ./snmp_exporter/:/etc/snmp_exporter/

expose:

- 9116

ports:

- 9116:9116

networks:

- public

prometheus: - job_name: 'prometheus' scrape_interval: 5s static_configs: - targets: ['localhost:9090'] - job_name: 'snmp' static_configs: - targets: - some ip # SNMP device. metrics_path: /snmp params: module: [default] relabel_configs: - source_labels: [__address__] target_label: __param_target - source_labels: [__param_target] target_label: instance - target_label: __address__ replacement: 'snmp-exporter:9116' # The SNMP exporter's real hostname:port How do I generte a snmp.yml file to query the brocade vdx switch and do I need to have snmp generator in my docker file aswell ? scrape_configs:

[Brian Candler]

> do I need to have snmp generator in my docker file aswell

No, the running snmp_exporter needs only the yaml file which was *output* from the generator.

I'd suggest you start with the supplied sample snmp.yml, edit it for your SNMP credentials, and get it working with if_mib.  Then you can look at using other MIBs with the generator.

The easy way to get credentials into the default snmp.yml is to use a YAML anchor+alias+merge trick:

...

if_mib: &if_mib

...

# Put this at the end of the file

if_mib_secret:

  <<: *if_mib

  version: 2

  auth:

    community: blah1234

[Parthey Khanderia]

Get http://snmp-exporter:9116/snmp?community=blah &module=if_mib&target=blah : context deadline exceeded

I keep getting this erro for context deadline exceeded. Also when i use the string to add in smp.yml it says error parse .yml file

Kinda stuck in a loop here. Please help

[Stuart Clark]

That error means the scrape is taking longer than the configured scrape
interval or timeout (whichever is shorter).

If you use curl or similar to make the same request, how long does it
take to reply?

--
Stuart Clark

[Parthey Khanderia]

snmp-exporter_1  | level=info ts=2020-05-04T17:18:29.187Z caller=collector.go:216 module=if_mib target=my_ip msg="Error scraping target" err="error getting target : context canceled"
 

[Parthey Khanderia]

When I do curl I get 

[1] 156655
[2] 156656
[$ 'target' parameter must be specified once
 
[1]-  Done                    curl http:ip :9116/snmp?community=string

[2]+  Done                    module=if_mib

[Stuart Clark]

As you have & in your query, which is a special character for your shell, you will need to enclose the URL in quotes.

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.

[Parthey Khanderia]

That part actually worked on. My services are now up. 

The error was while creating snmp.yml

Another question I had was regarding grafana. I am using Prometheus as data source but the Vm I am running my docker-compose the port 9090 is already in use .
To go around this I am using port 9990 but when i try to add datasource it get a " http error bad gateway" 

Anything special I need to do to add datasource since it is docker-compose