Here's the relevant part of the stack trace from the fluentd logs:
2019-10-07 20:25:04 +0000 [error]: unexpected error error_class=ArgumentError error="wrong number of arguments (given 2, expected 1)"
2019-10-07 20:25:04 +0000 [error]: /var/lib/gems/2.3.0/gems/prometheus-client-0.10.0/lib/prometheus/client/registry.rb:56:in `gauge'
2019-10-07 20:25:04 +0000 [error]: /var/lib/gems/2.3.0/gems/fluent-plugin-prometheus-1.6.0/lib/fluent/plugin/in_prometheus_tail_monitor.rb:53:in `start'
2019-10-07 20:25:04 +0000 [error]: /var/lib/gems/2.3.0/gems/fluentd-1.7.3/lib/fluent/root_agent.rb:203:in `block in start'
From the looks of it the problem is this code:
@metrics = {
position: @registry.gauge(
:fluentd_tail_file_position,
'Current position of file.'),
inode: @registry.gauge(
:fluentd_tail_file_inode,
'Current inode of file.'),
}...which no longer works because of this change (although even more arguments have since been added).
Adding a version constraint to limit prometheus-client to 0.9.0 seems to be an effective workaround but obviously it isn't a good permanent solution.
Here's the relevant part of the stack trace from the fluentd logs:
From the looks of it the problem is this code:
...which no longer works because of this change (although even more arguments have since been added).
Adding a version constraint to limit
prometheus-clientto0.9.0seems to be an effective workaround but obviously it isn't a good permanent solution.