I'd expect most of them to not accept arbitrarily high keep-alive timeouts from HTTP clients (or if they do, I'd wonder if it was done with the consequences in mind). How to bind Prometheus to your WMI exporter; 4. There's no reason to set any other value.I did some manual benchmarking and found connecting to be a significant CPU impact. On one the alert never for fired even though it is a candidate for alert.1) I have alerting rules. If this is not a production cluster I'd recommend you have a look at other solutions, for example the tectonic-installer (which can also create vanilla kubernetes clusters), and/or re-create this cluster to see whether this issue persists. Checking prometheus.yml FAILED: parsing YAML file prometheus.yml: scrape timeout greater than scrape interval for scrape config with job name "slow_fella" Just ensure that your scrape_timeout is long enough to accommodate your required scrape_interval. scrape is scheduled for T + interval and will normally happen then. Collect Docker metrics with Prometheus Estimated reading time: 8 minutes Prometheus is an open-source systems monitoring and alerting toolkit. :(.There everything seemed to be fine, what changed?Can you share all the versions you are using? Kubernetes (including the way you created your cluster and networking solution), Prometheus Operator.I don't think this is a Prometheus/Prometheus Operator problem as you are discovering the targets correctly (which is what the Prometheus Operator does) and the only problem is that Prometheus cannot connect to the targets, which you are also not able to do successfully with,Then I decided to switch to use RBAC user-guide at,FYI: Kubernetes v1.6, prometheus-operator v0.11.1, prometheus v1.7.0.Are you only having this problem with the node-exporter targets or with any other target? checks, you'll have noticed that Prometheus does not hit all of - prometheus/prometheus. The default value isn't relevant to the discussion and the described problem doesn't exist basically.you also have to manage the idle timeout on connections to be larger than the scrape interval.Why? Alertmanager,To make this concrete, suppose that you perform SSH blackbox checks First of all – what is wasteful in that context? I'm going to have to think carefully about just Now our DevOps is aware that there is an issue on this server and they can investigate on what’s happening exactly.As you can see, monitoring Windows servers can easily be done using Prometheus and Grafana.With this tutorial, you had a quick overview of what’s possible with the WMI exporter. On one the alert never for fired even though it is a candidate for alert.scrape interval and evaluation interval in prometheus,Podcast 270: Oracle tries to Tok, Nvidia Arms up,Nvidia has acquired Arm. On top, the total impact of a connect is amortized over number of series per scrape, which is also not known.I thought we had keep-alive already, it must have regressed at some point.I don't see how scrape timeout affects keep-alive?One of the selling points of Prometheus and its pull model is that you can easily cope with very large amount of targets if you only scrape at a sufficiently low frequency.The wasteful part is if the keep-alive timeout is slightly smaller than the scrape interval. getting the times when things happened is a huge pain; being able but of course then you get a flood of other information that you file_sd_configs: - files: - foo/*.slow.json This is what you should see in your web browser.Some metrics are very general and exported by all the exporters, but some of the metrics are very specific to your Windows host (like the.Windows Server monitoring is now active using the WMI exporter.If you remember correctly, Prometheus scrapes targets.This is done in Prometheus configuration file.As you probably saw from your web browser request, the WMI exporter exports a lot of metrics.As a consequence, there is a chance that the scrape request times out when trying to get the metrics.This is why we are going to set a high scrape timeout in our configuration file.If you want to keep a low scrape timeout, make sure to configure the WMI exporter to export less metrics (by specifying just a few collectors for example).Head over to your configuration file (mine is located at.Save your file, and restart your Prometheus service.Head back to the Prometheus UI, and select the “.If you are getting the following error, “context deadline exceeded”, make sure that the scrape timeout is set in your configuration file.Now it is time for us to start building an awesome Grafana dashboard to monitor our Windows Server.Prometheus should be configured as a Grafana target, and accessible through your reverse proxy.In Grafana, you can either create your own dashboards or you can use pre-existing ones that contributors already crafted for you.Head over to the main page of Grafana (located at http://localhost:3000 by default), and click on the.Select your Prometheus datasource in the “Prometheus” dropdown, and click on “Import” for the dashboard to be imported.As you can see, the dashboard is pretty exhaustive.On the second line, you have access to metrics related to the network monitoring. Default idle timeout in Go is 30s, for example. Since Prometheus also exposes data in the same manner about itself, it can also scrape and monitor its own health. Scrapes are driven by,So far, so good. Thank you!I had a same problem in the past. Alertmanager is configured via command-line flags and a configuration file. Prometheus collects metrics from monitored targets by scraping metrics HTTP endpoints on these targets. I am having a hard time understanding on how the two clocks (scrape and evaluation) function. (Okay, not regardless but not sufficiently defined by it. How Prometheus picks the start time for each By default, the prometheus-config section of the prometheus-eks.yaml and prometheus-k8s.yaml files contains the following global configuration lines: global: scrape_interval: 1m scrape_timeout: 10s Certainly not in the cardinality we are thinking of. # metrics_path defaults to '/metrics' # scheme defaults to 'http'. Given the many different possible scenarios, making it configurable seems unavoidable.I don't think it's trivially true that 2x scrape interval as keep-alive timeout is a sane default.I think that the only sane default is "the default major browsers use" exactly because of proxies, NATs and others.Are you interested in adding options to enable keep-alive connections (with default value,That change was already inadvertently made for 1.8, it's being reverted in.The scope of the PR was much broader than the title indicated, thus the revert as this question remains unsettled.I believe the code in 2.0 has keep-alive on for all connections.Was it fixed in 2.0? With this combination of timings, every TCP connection is kept open for 30s for no benefit at all.If you want to avoid the effect of surprising increases in open fd's after reducing the scrape interval, you also have to manage the idle timeout on connections to be larger than the scrape interval.On the other hand, if you have to think about tweaking the ulimit, it proves we.Default configuration can be as you propose: keep-alive enabled implicitly if scrape interval is under 30s. You are right that it is meant for a "generic" connection where we don't have the information if we will re-use at all, which is different for the typical Prometheus scrape where we know exactly if and when we will re-use.So yes, we can of course change the timeout in Prometheus to something like 2x the scrape interval. your coworkers to find and share information.I have prometheus configuration with many jobs where i am scraping metrics over http. Using those metrics, you are able to see if your application consume too much memory or too much disk.Finally, one of the greatest panels has to be the memory monitoring. evaluation_interval: 15s # By default, scrape targets every 15 seconds. And I can see exposed metrics at.Maybe the exposing services still working but prometheus seems like not able to scrape it.You're getting the exact same error from the.Actually I'm using AWS for hosting. You can configure Docker as a Prometheus target. By using our site, you acknowledge that you have read and understand our.Stack Overflow for Teams is a private, secure spot for you and You should be redirected to the notification channel configuration page.Copy the following configuration, and change the webhook URL with the one you were provided with in the last step.When your configuration is done, simply click on “.Let’s create a PromQL query to monitor our CPU usage.If you are not familiar with PromQL, there is a section dedicated to this language in my.First, the query splits the results by the mode (idle, user, interrupt, dpc, privileged). The answer is that it is not, or at least it is sort of not. to write optional logs of this would make some things much easier. JobName string `yaml:"job_name"` // Indicator whether the scraped metrics should remain unmodified. The number of required file descriptors will go up, but is still bounded.An easy solution could be to make it depend on the scrape interval. interesting and surprising interaction with alerting rules and Prometheus collects metrics from monitored targets by scraping metrics HTTP endpoints on these targets. I'd like to try making it a default there and only allow disabling once a use case appears. I used Rancher to setup my k8s cluster,I have almost no experience with kubernetes through rancher, but since it dynamically deploys kubernetes without clear master/worker topology, a lot of (networking) things can go wrong. So I'm not sure it's worth distinguishing to begin with, given that it additionally will catch people off guard if they reduce their scrape interval and suddenly have to adjust their ulimit.In general, it's a question of of connects/second. Are you running this on a cloud provider?Yes then most likely you need to adapt your security groups to allow workers to access that port for all your nodes.I will give it a try. Feel free to tag this issue if you open an issue there.Alright thank you for your support. Also, the documentation around this is very sparse. I fed 3 metrics back to back to Promethues and I found "alert" being raised only for 2 of them. Default scrape interval in Prometheus is 1m. scrape_timeout: 拉取超时时间 ... // ScrapeConfig configures a scraping unit for Prometheus. every 90 seconds, time out at 60 seconds, trigger a Prometheus alert Please open a new issue for related bugs.Successfully merging a pull request may close this issue.You signed in with another tab or window.Too many open files (established connections to same nodes),Re-enable http keepalive on remote storage.Even if CPU cycles are usually more costly than open FDs, a Prometheus server slowly scraping 10k targets might very well have plenty of CPU cycles to spare but might be limited to fewer than 10k open FDs.On the side of the monitored target, we usually don't provide an HTTP server owned by the Prometheus client library but piggyback on an existing server implementation. Howerver the problem still the same :(,https://github.com/prometheus/prometheus/issues/1438,Podcast 270: Oracle tries to Tok, Nvidia Arms up,Nvidia has acquired Arm. I guess there needs to be some sanity interval where you don't do keep-alive anymore (which doesn't have to be the 30s I brought in as the default from the Go HTTP package). 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The current stable HTTP API is reachable under /api/v1 on a Prometheus server. Thank you,I would exec into the container and try to,I’m using NodePort to expose node-exporter service to be accessible from external. Regardless of the amount of time a scrape at time T takes, the next How to download and install the WMI exporterfor Windows servers; 3. What changes when setting it to 31s?The only feasible option here is making it a boolean flag and let the user decide – globally for everything. By using our site, you acknowledge that you have read and understand our.Stack Overflow for Teams is a private, secure spot for you and ?Successfully merging a pull request may close this issue.Prometheus-operator doesn't scrape metrics from node-exporter,[__meta_kubernetes_service_label_service_monitor].You signed in with another tab or window.http://ec2-52-87-207-223.compute-1.amazonaws.com:32327/metrics,https://github.com/coreos/prometheus-operator/blob/master/Documentation/user-guides/cluster-monitoring.md,https://user-images.githubusercontent.com/19921743/28773292-1a8633be-7613-11e7-9016-f96be0759345.png,prometheus-k8s can only scrape local node_exporter (kube-aws). Format overview. The information is more or less captured in Prometheus metrics, but But I have one job where i need to scrape the metrics over https.I can see the metrics. Have you tried,Just to make sure, your node-exporter pods are actually up and running right? Prometheus depleted the FD allowance of monitored targets before… Finally, in between Prometheus and the target, there might be proxies, connection tracking firewalls, NAT, …, all of which will interact with the keep-alive behavior in various ways: HTTP proxies with a different idea about max idle timeout, connection-tracking dropping idle TCP connection at their own discretion.