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Merge pull request #2154 from catherineluse/tools
Rearrange/consolidate duplicated info in tools section
This commit is contained in:
Catherine Luse
GitHub
@@ -10,86 +10,41 @@ Rancher contains a variety of tools that aren't included in Kubernetes to assist
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<!-- TOC -->
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- [Notifiers](#notifiers)
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- [Alerts](#alerts)
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- [Notifiers and Alerts](#notifiers-and-alerts)
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- [Logging](#logging)
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- [Monitoring](#monitoring)
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- [Istio](#istio)
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<!-- /TOC -->
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## Notifiers and Alerts
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Notifiers and alerts are two features that work together to inform you of events in the Rancher system. Notifiers are objects that you configure to leverage popular IT services, which send you notification of Rancher events. Alerts are rule sets that trigger when those notifications are sent.
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Notifiers and alerts are two features that work together to inform you of events in the Rancher system.
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Notifiers and alerts are built on top of the [Prometheus Alertmanager](https://prometheus.io/docs/alerting/alertmanager/). Leveraging these tools, Rancher can notify [cluster owners]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#cluster-roles) and [project owners]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#project-roles) of events they need to address.
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When you create a cluster, some alert rules are predefined. For details, refer to the [documentation on default alerts.]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/alerts/default-alerts)
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### Notifiers
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Before you can receive alerts, you must configure one or more notifier in Rancher.
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_Notifiers_ are services that inform you of alert events. You can configure notifiers to send alert notifications to staff best suited to take corrective action. Rancher integrates with a variety of popular IT services, including:
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- Slack: Send alert notifications to your Slack channels.
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- Email: Choose email recipients for alert notifications.
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- PagerDuty: Route notifications to staff by phone, SMS, or personal email.
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- Webhooks: Update a webpage with alert notifications.
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- WeChat: Send alert notifications to your Enterprise WeChat contacts.
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For more information, see [Notifiers]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/notifiers/).
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### Alerts
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To keep your clusters and applications healthy and driving your organizational productivity forward, you need stay informed of events occurring in your clusters, both planned and unplanned. To help you stay informed of these events, Rancher allows you to configure alerts.
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_Alerts_ are sets of rules, chosen by you, to monitor for specific events. The scope for alerts can be set at either the cluster or project level.
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Some examples of alert events are:
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- A Kubernetes [master component]({{< baseurl >}}/rancher/v2.x/en/cluster-provisioning/#kubernetes-cluster-node-components) entering an unhealthy state.
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- A node or [workload]({{< baseurl >}}/rancher/v2.x/en/k8s-in-rancher/workloads/) error occurring.
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- A scheduled deployment taking place as planned.
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- A node's hardware resources becoming overstressed.
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When an event occurs, your alert is triggered, and you are sent a notification. You can then, if necessary, follow up with corrective actions.
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Additionally, you can set an urgency level for each alert. This urgency appears in the notification you receive, helping you to prioritize your response actions. For example, if you have an alert configured to inform you of a routine deployment, no action is required. These alerts can be assigned a low priority level. However, if a deployment fails, it can critically impact your organization, and you need to react quickly. Assign these alerts a high priority level.
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You can configure alerts at either the [cluster level]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/alerts/) or [project level]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/alerts/).
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[Notifiers]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/notifiers) are services that inform you of alert events. You can configure notifiers to send alert notifications to staff best suited to take corrective action. Notifications can be sent with Slack, email, PagerDuty, WeChat, and webhooks.
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[Alerts]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/alerts) are rules that trigger those notifications. Before you can receive alerts, you must configure one or more notifier in Rancher. The scope for alerts can be set at either the cluster or project level.
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## Logging
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Rancher can integrate with popular external services used for event streams, telemetry, or search. Rancher can integrate with the following services:
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Logging is helpful because it allows you to:
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- Elasticsearch
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- splunk
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- kafka
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- syslog
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- fluentd
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- Capture and analyze the state of your cluster
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- Look for trends in your environment
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- Save your logs to a safe location outside of your cluster
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- Stay informed of events like a container crashing, a pod eviction, or a node dying
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- More easily debugg and troubleshoot problems
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These services collect container log events, which are saved to the `/var/log/containers` directory on each of your nodes. The service collects both standard and error events. You can then log into your services to review the events collected, leveraging each service's unique features.
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Rancher can integrate with Elasticsearch, splunk, kafka, syslog, and fluentd.
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When configuring Rancher to integrate with these services, you'll have to point Rancher toward the service's endpoint and provide authentication information. Additionally, you'll have the opportunity to enter key value pairs to filter the log events collected. The service will only collect events for containers marked with your configured key value pairs.
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### Logging Advantages
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Setting up a logging service to collect logs from your cluster or project is helpful several ways:
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- Logs errors and warnings in your Kubernetes infrastructure to a stream. The stream informs you of events like a container crashing, a pod eviction, or a node dying.
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- Allows you to capture and analyze the state of your cluster and look for trends in your environment using the log stream.
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- Helps you when troubleshooting or debugging.
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- Saves your logs to a safe location outside of your cluster, so that you can still access them even if your cluster encounters issues.
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You can configure these services to collect logs at either the [cluster level]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/logging/) or [project level]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/logging/).
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For details, refer to the [logging section.]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/logging)
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## Monitoring
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_Available as of v2.2.0_
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Using Rancher, you can monitor the state and processes of your cluster nodes, Kubernetes components, and software deployments through integration with [Prometheus](https://prometheus.io/), a leading open-source monitoring solution. Prometheus provides a _time series_ of your data, which is a stream of timestamped values belonging to the same metric and the same set of labeled dimensions, along with comprehensive statistics and metrics of the monitored cluster.
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Using Rancher, you can monitor the state and processes of your cluster nodes, Kubernetes components, and software deployments through integration with [Prometheus](https://prometheus.io/), a leading open-source monitoring solution. For details, refer to the [monitoring section.]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/monitoring)
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In other words, Prometheus let's you view metrics from your different Rancher and Kubernetes objects. Using timestamps, you can query and view these metrics in easy-to-read graphs and visuals, either through the Rancher UI or [Grafana](https://grafana.com/), which is an analytics viewing platform deployed along with Prometheus. By viewing data that Prometheus scrapes from your cluster control plane, nodes, and deployments, you can stay on top of everything happening in your cluster. You can then use these analytics to better run your organization: stop system emergencies before they start, develop maintenance strategies, restore crashed servers, etc. Multi-tenancy support in terms of cluster and project-only Prometheus instances are also supported.
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## Istio
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You can configure these services to collect logs at either the [cluster level]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/monitoring/) or [project level]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/monitoring/).
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[Istio](https://istio.io/) is an open-source tool that makes it easier for DevOps teams to observe, control, troubleshoot, and secure the traffic within a complex network of microservices. For details on how to enable Istio in Rancher, refer to the [Istio section.]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/istio)
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@@ -3,15 +3,38 @@ title: Alerts
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weight: 2
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---
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To keep your clusters and applications healthy and driving your organizational productivity forward, you need to stay informed of events occurring in your clusters and projects, both planned and unplanned. To help you stay informed of these events, you can configure alerts.
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To keep your clusters and applications healthy and driving your organizational productivity forward, you need to stay informed of events occurring in your clusters and projects, both planned and unplanned. When an event occurs, your alert is triggered, and you are sent a notification. You can then, if necessary, follow up with corrective actions.
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Alerts are sets of rules, chosen by you, to monitor for specific events.
|
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Notifiers and alerts are built on top of the [Prometheus Alertmanager](https://prometheus.io/docs/alerting/alertmanager/). Leveraging these tools, Rancher can notify [cluster owners]({{<baseurl>}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#cluster-roles) and [project owners]({{<baseurl>}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#project-roles) of events they need to address.
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Before you can receive alerts, you must configure one or more notifier in Rancher.
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When you create a cluster, some alert rules are predefined. You can receive these alerts if you configure a [notifier]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/notifiers) for them.
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For details about what triggers the predefined alerts, refer to the [documentation on default alerts.]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/alerts/default-alerts)
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## Alerts Scope
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This section covers the following topics:
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- [Alert event examples](#alert-event-examples)
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- [Urgency levels](#urgency-levels)
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- [Scope of alerts](#scope-of-alerts)
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- [Adding cluster alerts](#adding-cluster-alerts)
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- [Managing cluster alerts](#managing-cluster-alerts)
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# Alert Event Examples
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Some examples of alert events are:
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- A Kubernetes [master component]({{< baseurl >}}/rancher/v2.x/en/cluster-provisioning/#kubernetes-cluster-node-components) entering an unhealthy state.
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- A node or [workload]({{< baseurl >}}/rancher/v2.x/en/k8s-in-rancher/workloads/) error occurring.
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- A scheduled deployment taking place as planned.
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- A node's hardware resources becoming overstressed.
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# Urgency Levels
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You can set an urgency level for each alert. This urgency appears in the notification you receive, helping you to prioritize your response actions. For example, if you have an alert configured to inform you of a routine deployment, no action is required. These alerts can be assigned a low priority level. However, if a deployment fails, it can critically impact your organization, and you need to react quickly. Assign these alerts a high priority level.
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# Scope of Alerts
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The scope for alerts can be set at either the cluster level or [project level]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/alerts/).
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@@ -22,7 +45,7 @@ At the cluster level, Rancher monitors components in your Kubernetes cluster, an
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- The resource events from specific system services.
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- The Prometheus expression cross the thresholds
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## Adding Cluster Alerts
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# Adding Cluster Alerts
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As a [cluster owner]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#cluster-roles), you can configure Rancher to send you alerts for cluster events.
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@@ -202,7 +225,7 @@ This alert type monitors for the overload from Prometheus expression querying, i
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**Result:** Your alert is configured. A notification is sent when the alert is triggered.
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## Managing Cluster Alerts
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# Managing Cluster Alerts
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After you set up cluster alerts, you can manage each alert object. To manage alerts, browse to the cluster containing the alerts, and then select **Tools > Alerts** that you want to manage. You can:
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@@ -210,4 +233,4 @@ After you set up cluster alerts, you can manage each alert object. To manage ale
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- Edit alert settings
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- Delete unnecessary alerts
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- Mute firing alerts
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- Unmute muted alerts
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- Unmute muted alerts
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@@ -8,7 +8,13 @@ aliases:
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- /rancher/v2.x/en/tools/logging/
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---
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Rancher can integrate with a variety of popular logging services and tools that exist outside of your Kubernetes clusters.
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Logging is helpful because it allows you to:
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- Capture and analyze the state of your cluster
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- Look for trends in your environment
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- Save your logs to a safe location outside of your cluster
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- Stay informed of events like a container crashing, a pod eviction, or a node dying
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- More easily debugg and troubleshoot problems
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Rancher supports integration with the following services:
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@@ -18,9 +24,26 @@ Rancher supports integration with the following services:
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- Syslog
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- Fluentd
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This section covers the following topics:
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- [How logging integrations work](#how-logging-integrations-work)
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- [Requirements](#requirements)
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- [Logging scope](#logging-scope)
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- [Enabling cluster logging](#enabling-cluster-logging)
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# How Logging Integrations Work
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Rancher can integrate with popular external services used for event streams, telemetry, or search. These services can log errors and warnings in your Kubernetes infrastructure to a stream.
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|
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These services collect container log events, which are saved to the `/var/log/containers` directory on each of your nodes. The service collects both standard and error events. You can then log into your services to review the events collected, leveraging each service's unique features.
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When configuring Rancher to integrate with these services, you'll have to point Rancher toward the service's endpoint and provide authentication information.
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Additionally, you'll have the opportunity to enter key-value pairs to filter the log events collected. The service will only collect events for containers marked with your configured key-value pairs.
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>**Note:** You can only configure one logging service per cluster or per project.
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## Requirements
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# Requirements
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The Docker daemon on each node in the cluster should be [configured](https://docs.docker.com/config/containers/logging/configure/) with the (default) log-driver: `json-file`. You can check the log-driver by running the following command:
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@@ -29,16 +52,7 @@ $ docker info | grep 'Logging Driver'
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Logging Driver: json-file
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```
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## Advantages
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Setting up a logging service to collect logs from your cluster/project has several advantages:
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- Logs errors and warnings in your Kubernetes infrastructure to a stream. The stream informs you of events like a container crashing, a pod eviction, or a node dying.
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- Allows you to capture and analyze the state of your cluster and look for trends in your environment using the log stream.
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- Helps you when troubleshooting or debugging.
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- Saves your logs to a safe location outside of your cluster, so that you can still access them even if your cluster encounters issues.
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## Logging Scope
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# Logging Scope
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You can configure logging at either cluster level or project level.
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@@ -50,7 +64,7 @@ Logs that are sent to your logging service are from the following locations:
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- Pod logs stored at `/var/log/containers`.
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- Kubernetes system components logs stored at `/var/lib/rancher/rke/log/`.
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## Enabling Cluster Logging
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# Enabling Cluster Logging
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As an [administrator]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/global-permissions/) or [cluster owner]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#cluster-roles), you can configure Rancher to send Kubernetes logs to a logging service.
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@@ -6,13 +6,32 @@ weight: 4
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_Available as of v2.2.0_
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Using Rancher, you can monitor the state and processes of your cluster nodes, Kubernetes components, and software deployments through integration with [Prometheus](https://prometheus.io/), a leading open-source monitoring solution. Prometheus provides a _time series_ of your data, which is, according to [Prometheus documentation](https://prometheus.io/docs/concepts/data_model/):
|
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Using Rancher, you can monitor the state and processes of your cluster nodes, Kubernetes components, and software deployments through integration with [Prometheus](https://prometheus.io/), a leading open-source monitoring solution.
|
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This section covers the following topics:
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- [About Prometheus](#about-prometheus)
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- [Monitoring scope](#monitoring-scope)
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- [Enabling cluster monitoring](#enabling-cluster-monitoring)
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- [Resource consumption](#resource-consumption)
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- [Resource consumption of Prometheus pods](#resource-consumption-of-prometheus-pods)
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- [Resource consumption of other pods](#resources-consumption-of-other-pods)
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# About Prometheus
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Prometheus provides a _time series_ of your data, which is, according to [Prometheus documentation](https://prometheus.io/docs/concepts/data_model/):
|
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You can configure these services to collect logs at either the cluster level or the project level. This page describes how to enable monitoring for a cluster. For details on enabling monitoring for a project, refer to the [project administration section]({{<baseurl>}}/rancher/v2.x/en/project-admin/tools/monitoring/).
|
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|
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>A stream of timestamped values belonging to the same metric and the same set of labeled dimensions, along with comprehensive statistics and metrics of the monitored cluster.
|
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|
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In other words, Prometheus lets you view metrics from your different Rancher and Kubernetes objects. Using timestamps, Prometheus lets you query and view these metrics in easy-to-read graphs and visuals, either through the Rancher UI or [Grafana](https://grafana.com/), which is an analytics viewing platform deployed along with Prometheus. By viewing data that Prometheus scrapes from your cluster control plane, nodes, and deployments, you can stay on top of everything happening in your cluster. You can then use these analytics to better run your organization: stop system emergencies before they start, develop maintenance strategies, restore crashed servers, etc. Multi-tenancy support in terms of cluster and project-only Prometheus instances are also supported.
|
||||
In other words, Prometheus lets you view metrics from your different Rancher and Kubernetes objects. Using timestamps, Prometheus lets you query and view these metrics in easy-to-read graphs and visuals, either through the Rancher UI or [Grafana](https://grafana.com/), which is an analytics viewing platform deployed along with Prometheus.
|
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|
||||
## Monitoring Scope
|
||||
By viewing data that Prometheus scrapes from your cluster control plane, nodes, and deployments, you can stay on top of everything happening in your cluster. You can then use these analytics to better run your organization: stop system emergencies before they start, develop maintenance strategies, restore crashed servers, etc.
|
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|
||||
Multi-tenancy support in terms of cluster-only and project-only Prometheus instances are also supported.
|
||||
|
||||
# Monitoring Scope
|
||||
|
||||
Using Prometheus, you can monitor Rancher at both the cluster level and [project level]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/monitoring/). For each cluster and project that is enabled for monitoring, Rancher deploys a Prometheus server.
|
||||
|
||||
@@ -24,7 +43,7 @@ Using Prometheus, you can monitor Rancher at both the cluster level and [project
|
||||
|
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- [Project monitoring]({{< baseurl >}}/rancher/v2.x/en/project-admin/tools/monitoring/) allows you to view the state of pods running in a given project. Prometheus collects metrics from the project's deployed HTTP and TCP/UDP workloads.
|
||||
|
||||
## Enabling Cluster Monitoring
|
||||
# Enabling Cluster Monitoring
|
||||
|
||||
As an [administrator]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/global-permissions/) or [cluster owner]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/cluster-project-roles/#cluster-roles), you can configure Rancher to deploy Prometheus to monitor your Kubernetes cluster.
|
||||
|
||||
@@ -36,13 +55,13 @@ As an [administrator]({{< baseurl >}}/rancher/v2.x/en/admin-settings/rbac/global
|
||||
|
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1. Click **Save**.
|
||||
|
||||
**Result:** The Prometheus server will be deployed as well as two monitoring applications. The two monitoring applications, `cluster-monitoring` and `monitoring-operator`, are added as an [application]({{< baseurl >}}/rancher/v2.x/en/catalog/apps/) to the cluster's `system` project. After the applications are `active`, you can start viewing [cluster metrics]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/monitoring/cluster-metrics/) through the [Rancher dashboard]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/monitoring/viewing-metrics/#rancher-dashboard) or directly from [Grafana]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/tools/monitoring/#grafana).
|
||||
**Result:** The Prometheus server will be deployed as well as two monitoring applications. The two monitoring applications, `cluster-monitoring` and `monitoring-operator`, are added as an [application]({{< baseurl >}}/rancher/v2.x/en/catalog/apps/) to the cluster's `system` project. After the applications are `active`, you can start viewing [cluster metrics]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/monitoring/cluster-metrics/) through the [Rancher dashboard]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/monitoring/viewing-metrics/#rancher-dashboard) or directly from [Grafana]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/tools/monitoring/#grafana).
|
||||
|
||||
### Resource Consumption
|
||||
# Resource Consumption
|
||||
|
||||
When enabling cluster monitoring, you need to ensure your worker nodes and Prometheus pod have enough resources. The tables below provides a guide of how much resource consumption will be used. In larger deployments, it is strongly advised that the monitoring infrastructure be placed on dedicated nodes in the cluster.
|
||||
|
||||
#### Prometheus Pod Resource Consumption
|
||||
### Resource Consumption of Prometheus Pods
|
||||
|
||||
This table is the resource consumption of the Prometheus pod, which is based on the number of all the nodes in the cluster. The count of nodes includes the worker, control plane and etcd nodes. Total disk space allocation should be approximated by the `rate * retention` period set at the cluster level. When enabling cluster level monitoring, you should adjust the CPU and Memory limits and reservation.
|
||||
|
||||
@@ -70,7 +89,7 @@ Additional pod resource requirements for cluster level monitoring.
|
||||
| Operator | prometheus-operator | 100m | 50Mi | 200m | 100Mi | Y |
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||||
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||||
|
||||
#### Other Pods Resource Consumption
|
||||
### Resource Consumption of Other Pods
|
||||
|
||||
Besides the Prometheus pod, there are components that are deployed that require additional resources on the worker nodes.
|
||||
|
||||
@@ -79,4 +98,4 @@ Pod | CPU (milli CPU) | Memory (MB)
|
||||
Node Exporter (Per Node) | 100 | 30
|
||||
Kube State Cluster Monitor | 100 | 130
|
||||
Grafana | 100 | 150
|
||||
Prometheus Cluster Monitoring Nginx | 50 | 50
|
||||
Prometheus Cluster Monitoring Nginx | 50 | 50
|
||||
Reference in New Issue
Block a user