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Diffstat (limited to 'collectors/python.d.plugin/varnish')
| l---------[-rw-r--r--] | collectors/python.d.plugin/varnish/README.md | 89 | ||||
| -rw-r--r-- | collectors/python.d.plugin/varnish/integrations/varnish.md | 212 | ||||
| -rw-r--r-- | collectors/python.d.plugin/varnish/metadata.yaml | 4 |
3 files changed, 215 insertions, 90 deletions
diff --git a/collectors/python.d.plugin/varnish/README.md b/collectors/python.d.plugin/varnish/README.md index d30a9fb1d..194be2335 100644..120000 --- a/collectors/python.d.plugin/varnish/README.md +++ b/collectors/python.d.plugin/varnish/README.md @@ -1,88 +1 @@ -<!-- -title: "Varnish Cache monitoring with Netdata" -custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/varnish/README.md" -sidebar_label: "Varnish Cache" -learn_status: "Published" -learn_topic_type: "References" -learn_rel_path: "Integrations/Monitor/Webapps" ---> - -# Varnish Cache collector - -Provides HTTP accelerator global, Backends (VBE) and Storages (SMF, SMA, MSE) statistics using `varnishstat` tool. - -Note that both, Varnish-Cache (free and open source) and Varnish-Plus (Commercial/Enterprise version), are supported. - -## Requirements - -- `netdata` user must be a member of the `varnish` group - -## Charts - -This module produces the following charts: - -- Connections Statistics in `connections/s` -- Client Requests in `requests/s` -- All History Hit Rate Ratio in `percent` -- Current Poll Hit Rate Ratio in `percent` -- Expired Objects in `expired/s` -- Least Recently Used Nuked Objects in `nuked/s` -- Number Of Threads In All Pools in `pools` -- Threads Statistics in `threads/s` -- Current Queue Length in `requests` -- Backend Connections Statistics in `connections/s` -- Requests To The Backend in `requests/s` -- ESI Statistics in `problems/s` -- Memory Usage in `MiB` -- Uptime in `seconds` - -For every backend (VBE): - -- Backend Response Statistics in `kilobits/s` - -For every storage (SMF, SMA, or MSE): - -- Storage Usage in `KiB` -- Storage Allocated Objects - -## Configuration - -Edit the `python.d/varnish.conf` configuration file using `edit-config` from the Netdata [config -directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md), which is typically at `/etc/netdata`. - -```bash -cd /etc/netdata # Replace this path with your Netdata config directory, if different -sudo ./edit-config python.d/varnish.conf -``` - -Only one parameter is supported: - -```yaml -instance_name: 'name' -``` - -The name of the `varnishd` instance to get logs from. If not specified, the host name is used. - - - - -### Troubleshooting - -To troubleshoot issues with the `varnish` module, run the `python.d.plugin` with the debug option enabled. The -output will give you the output of the data collection job or error messages on why the collector isn't working. - -First, navigate to your plugins directory, usually they are located under `/usr/libexec/netdata/plugins.d/`. If that's -not the case on your system, open `netdata.conf` and look for the setting `plugins directory`. Once you're in the -plugin's directory, switch to the `netdata` user. - -```bash -cd /usr/libexec/netdata/plugins.d/ -sudo su -s /bin/bash netdata -``` - -Now you can manually run the `varnish` module in debug mode: - -```bash -./python.d.plugin varnish debug trace -``` - +integrations/varnish.md
\ No newline at end of file diff --git a/collectors/python.d.plugin/varnish/integrations/varnish.md b/collectors/python.d.plugin/varnish/integrations/varnish.md new file mode 100644 index 000000000..142875f4b --- /dev/null +++ b/collectors/python.d.plugin/varnish/integrations/varnish.md @@ -0,0 +1,212 @@ +<!--startmeta +custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/varnish/README.md" +meta_yaml: "https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/varnish/metadata.yaml" +sidebar_label: "Varnish" +learn_status: "Published" +learn_rel_path: "Data Collection/Web Servers and Web Proxies" +message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE" +endmeta--> + +# Varnish + + +<img src="https://netdata.cloud/img/varnish.svg" width="150"/> + + +Plugin: python.d.plugin +Module: varnish + +<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" /> + +## Overview + +This collector monitors Varnish metrics about HTTP accelerator global, Backends (VBE) and Storages (SMF, SMA, MSE) statistics. + +Note that both, Varnish-Cache (free and open source) and Varnish-Plus (Commercial/Enterprise version), are supported. + + +It uses the `varnishstat` tool in order to collect the metrics. + + +This collector is supported on all platforms. + +This collector only supports collecting metrics from a single instance of this integration. + +`netdata` user must be a member of the `varnish` group. + + +### Default Behavior + +#### Auto-Detection + +By default, if the permissions are satisfied, the `varnishstat` tool will be executed on the host. + +#### Limits + +The default configuration for this integration does not impose any limits on data collection. + +#### Performance Impact + +The default configuration for this integration is not expected to impose a significant performance impact on the system. + + +## Metrics + +Metrics grouped by *scope*. + +The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels. + + + +### Per Varnish instance + +These metrics refer to the entire monitored application. + +This scope has no labels. + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| varnish.session_connection | accepted, dropped | connections/s | +| varnish.client_requests | received | requests/s | +| varnish.all_time_hit_rate | hit, miss, hitpass | percentage | +| varnish.current_poll_hit_rate | hit, miss, hitpass | percentage | +| varnish.cached_objects_expired | objects | expired/s | +| varnish.cached_objects_nuked | objects | nuked/s | +| varnish.threads_total | None | number | +| varnish.threads_statistics | created, failed, limited | threads/s | +| varnish.threads_queue_len | in queue | requests | +| varnish.backend_connections | successful, unhealthy, reused, closed, recycled, failed | connections/s | +| varnish.backend_requests | sent | requests/s | +| varnish.esi_statistics | errors, warnings | problems/s | +| varnish.memory_usage | free, allocated | MiB | +| varnish.uptime | uptime | seconds | + +### Per Backend + + + +This scope has no labels. + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| varnish.backend | header, body | kilobits/s | + +### Per Storage + + + +This scope has no labels. + +Metrics: + +| Metric | Dimensions | Unit | +|:------|:----------|:----| +| varnish.storage_usage | free, allocated | KiB | +| varnish.storage_alloc_objs | allocated | objects | + + + +## Alerts + +There are no alerts configured by default for this integration. + + +## Setup + +### Prerequisites + +#### Provide the necessary permissions + +In order for the collector to work, you need to add the `netdata` user to the `varnish` user group, so that it can execute the `varnishstat` tool: + +``` +usermod -aG varnish netdata +``` + + + +### Configuration + +#### File + +The configuration file name for this integration is `python.d/varnish.conf`. + + +You can edit the configuration file using the `edit-config` script from the +Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory). + +```bash +cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata +sudo ./edit-config python.d/varnish.conf +``` +#### Options + +There are 2 sections: + +* Global variables +* One or more JOBS that can define multiple different instances to monitor. + +The following options can be defined globally: priority, penalty, autodetection_retry, update_every, but can also be defined per JOB to override the global values. + +Additionally, the following collapsed table contains all the options that can be configured inside a JOB definition. + +Every configuration JOB starts with a `job_name` value which will appear in the dashboard, unless a `name` parameter is specified. + + +<details><summary>Config options</summary> + +| Name | Description | Default | Required | +|:----|:-----------|:-------|:--------:| +| instance_name | the name of the varnishd instance to get logs from. If not specified, the local host name is used. | | True | +| update_every | Sets the default data collection frequency. | 10 | False | +| priority | Controls the order of charts at the netdata dashboard. | 60000 | False | +| autodetection_retry | Sets the job re-check interval in seconds. | 0 | False | +| penalty | Indicates whether to apply penalty to update_every in case of failures. | yes | False | +| name | Job name. This value will overwrite the `job_name` value. JOBS with the same name are mutually exclusive. Only one of them will be allowed running at any time. This allows autodetection to try several alternatives and pick the one that works. | | False | + +</details> + +#### Examples + +##### Basic + +An example configuration. + +```yaml +job_name: + instance_name: '<name-of-varnishd-instance>' + +``` + + +## Troubleshooting + +### Debug Mode + +To troubleshoot issues with the `varnish` collector, run the `python.d.plugin` with the debug option enabled. The output +should give you clues as to why the collector isn't working. + +- Navigate to the `plugins.d` directory, usually at `/usr/libexec/netdata/plugins.d/`. If that's not the case on + your system, open `netdata.conf` and look for the `plugins` setting under `[directories]`. + + ```bash + cd /usr/libexec/netdata/plugins.d/ + ``` + +- Switch to the `netdata` user. + + ```bash + sudo -u netdata -s + ``` + +- Run the `python.d.plugin` to debug the collector: + + ```bash + ./python.d.plugin varnish debug trace + ``` + + diff --git a/collectors/python.d.plugin/varnish/metadata.yaml b/collectors/python.d.plugin/varnish/metadata.yaml index aa245c25f..d31c1cf6f 100644 --- a/collectors/python.d.plugin/varnish/metadata.yaml +++ b/collectors/python.d.plugin/varnish/metadata.yaml @@ -75,8 +75,8 @@ modules: enabled: true list: - name: instance_name - description: the name of the varnishd instance to get logs from. If not specified, the host name is used. - default_value: '<host name>' + description: the name of the varnishd instance to get logs from. If not specified, the local host name is used. + default_value: "" required: true - name: update_every description: Sets the default data collection frequency. |