Call to undefined function crypto:hmac

[Sonic0]

Hello everyone! I'm trying this awesome RabbitMQ Plugin, but I have been having a problem with a call to undefined function crypto:hmac.

RabbitMQ version: 3.8.18 Erlang/OTP version: 24 rabbitmq-cloudwatch-exporter version: 1.0.0

Plugin section in rabbitmq.conf:

cloudwatch_exporter.aws.access_key_id = "ACCESS_KEY_XXXXX"
cloudwatch_exporter.aws.secret_access_key = "SECRET_KEY_XXXXX"
cloudwatch_exporter.aws.region="eu-west-1"
cloudwatch_exporter.metrics.overview.enable = true
cloudwatch_exporter.metrics.vhost.enable = true
cloudwatch_exporter.metrics.node.enable = false

The error in rabbitmq log:

2021-06-30 [error] <0.734.0> ** Generic server rabbitmq_cloudwatch_exporter terminating
** Last message in was export_metrics
** When Server state == [{aws,[{secret_access_key,<<"SECRET_KEY_XXXXXX">>},{access_key_id,<<"ACCESS_KEY_XXXXXX">>},{region,<<"eu-west-1">>}]},{period,60},{resolution,60},{namespace,<<"RabbitMQ">>},{collectors,[{overview,[]},{vhost,[]}]}]
** Reason for termination ==
** {'function not exported',[{crypto,hmac,[sha256,[<<"AWS4">>,<<"SECRET_KEY_XXXXXX">>],[<<"2021">>,<<"06">>,<<"30">>]],[]},{'Elixir.ExAws.Auth.Signatures',signing_key,3,[{file,"lib/ex_aws/auth/signatures.ex"},{line,14}]},{'Elixir.ExAws.Auth.Signatures',generate_signature_v4,4,[{file,"lib/ex_aws/auth/signatures.ex"},{line,7}]},{'Elixir.ExAws.Auth',auth_header,7,[{file,"lib/ex_aws/auth.ex"},{line,129}]},{'Elixir.ExAws.Auth',headers,6,[{file,"lib/ex_aws/auth.ex"},{line,45}]},{'Elixir.ExAws.Request',request_and_retry,7,[{file,"lib/ex_aws/request.ex"},{line,29}]},{'Elixir.ExAws.Operation.ExAws.Operation.Query',perform,2,[{file,"lib/ex_aws/operation/query.ex"},{line,33}]},{'Elixir.RabbitMQCloudWatchExporter.Exporter','-export_metrics/3-fun-0-',3,[{file,"lib/rabbitmq_cloudwatch_exporter/exporter.ex"},{line,146}]}]}

2021-06-30 [error] <0.734.0> CRASH REPORT Process <0.734.0> with 1 neighbours crashed with reason: call to undefined function crypto:hmac(sha256, [<<"AWS4">>,<<"SECRET_KEY_XXXXXX">>], [<<"2021">>,<<"06">>,<<"30">>])

2021-06-30 [error] <0.728.0> Supervisor 'Elixir.Singleton.Supervisor' had child 'Elixir.Singleton.Manager' started with 'Elixir.Singleton.Manager':start_link('Elixir.RabbitMQCloudWatchExporter.Exporter', [], rabbitmq_cloudwatch_exporter, 'singleton_0bpF3SXqPATXc25tAf+lu5E9sgN') at <0.733.0> exit with reason call to undefined function crypto:hmac(sha256, [<<"AWS4">>,<<"SECRET_KEY_XXXXXX">>], [<<"2021">>,<<"06">>,<<"30">>]) in context child_terminated

2021-06-30 [error] <0.731.0> CRASH REPORT Process <0.731.0> with 0 neighbours exited with reason: call to undefined function crypto:hmac(sha256, [<<"AWS4">>,<<"SECRET_KEY_XXXXXX">>], [<<"2021">>,<<"06">>,<<"30">>]) in application_master:terminate/2 line 236

2021-06-30 [info] <0.44.0> Application rabbitmq_cloudwatch_exporter exited with reason: call to undefined function crypto:hmac(sha256, [<<"AWS4">>,<<"SECRET_KEY_XXXXXX">>], [<<"2021">>,<<"06">>,<<"30">>])

Thanks for the help.

[Sonic0]

I found the problem, that is Erlang 24. Installing Erlang 23.3.1 this plugin work. At this time no problem installing Erlang 23, but in the future might be problems. Thanks

[noxdafox]

Apologies for the late reply.

It seems Erlang deprecated a series of crypto functions in release 24. https://erlang.org/doc/general_info/deprecations.html#otp-23

As ex_aws already fixed the issue in v2.1.7 I will make soon a new release.

[Sonic0]

Apologies for the late reply.

No problem, this is the OpenSource :satisfied: . I have been using Erlang 23.3.X and this plugin working fine.

As ex_aws already fixed the issue in v2.1.7 I will make soon a new release.

:heart_eyes: Thank you very much.

Ciao

[pbudzon]

It would be great if we could have the new release please, we only have erlang 24 in the repository and cannot use this plugin as such :(

[noxdafox]

Updated ez_aws binary in the release (1.0.0) assets. This should fix the issue. Please re-open this ticket if not.

[soro1987]

@Sonic0 Thanks bro you'r a Boss !!!