Enable Pluggable Components

KubeSphere Events

What are KubeSphere Events

KubeSphere events allow users to keep track of what is happening inside a cluster, such as node scheduling status and image pulling result. They will be accurately recorded with the specific reason, status and message displayed in the web console. To query events, users can quickly launch the web Toolkit and enter related information in the search bar with different filters (e.g keyword and project) available. Events can also be archived to third-party tools, such as Elasticsearch, Kafka or Fluentd.

For more information, see Logging, Events and Auditing.

Enable Events before Installation

Installing on Linux

When you install KubeSphere on Linux, you need to create a configuration file, which lists all KubeSphere components.

  1. In the tutorial of Installing KubeSphere on Linux, you create a default file config-sample.yaml. Modify the file by executing the following command:
vi config-sample.yaml

Note

If you adopt All-in-one Installation, you do not need to create a config-sample.yaml file as you can create a cluster directly. Generally, the all-in-one mode is for users who are new to KubeSphere and look to get familiar with the system. If you want to enable Events in this mode (e.g. for testing purpose), refer to the following section to see how Events can be installed after installation.
  1. In this file, navigate to events and change false to true for enabled. Save the file after you finish.
events:
    enabled: true # Change "false" to "true"

Note

By default, KubeKey will install Elasticsearch internally if Events is enabled. For a production environment, it is highly recommended that you set the following value in config-sample.yaml if you want to enable Events, especially externalElasticsearchUrl and externalElasticsearchPort. Once you provide the following information before installation, KubeKey will integrate your external Elasticsearch directly instead of installing an internal one.
es:  # Storage backend for logging, tracing, events and auditing.
  elasticsearchMasterReplicas: 1   # total number of master nodes, it's not allowed to use even number
  elasticsearchDataReplicas: 1     # total number of data nodes
  elasticsearchMasterVolumeSize: 4Gi   # Volume size of Elasticsearch master nodes
  elasticsearchDataVolumeSize: 20Gi    # Volume size of Elasticsearch data nodes
  logMaxAge: 7                     # Log retention time in built-in Elasticsearch, it is 7 days by default.
  elkPrefix: logstash              # The string making up index names. The index name will be formatted as ks-<elk_prefix>-log
  externalElasticsearchUrl: # The URL of external Elasticsearch
  externalElasticsearchPort: # The port of external Elasticsearch
  1. Create a cluster using the configuration file:
./kk create cluster -f config-sample.yaml

Installing on Kubernetes

When you install KubeSphere on Kubernetes, you need to download the file cluster-configuration.yaml for cluster setting. If you want to install Events, do not use kubectl apply -f directly for this file.

  1. In the tutorial of Installing KubeSphere on Kubernetes, you execute kubectl apply -f first for the file kubesphere-installer.yaml. After that, to enable Events, create a local file cluster-configuration.yaml.
vi cluster-configuration.yaml
  1. Copy all the content in the file cluster-configuration.yaml and paste it to the local file just created.
  2. In this local cluster-configuration.yaml file, navigate to events and enable Events by changing false to true for enabled. Save the file after you finish.
events:
    enabled: true # Change "false" to "true"

Note

By default, ks-installer will install Elasticsearch internally if Events is enabled. For a production environment, it is highly recommended that you set the following value in cluster-configuration.yaml if you want to enable Events, especially externalElasticsearchUrl and externalElasticsearchPort. Once you provide the following information before installation, ks-installer will integrate your external Elasticsearch directly instead of installing an internal one.
es:  # Storage backend for logging, tracing, events and auditing.
  elasticsearchMasterReplicas: 1   # total number of master nodes, it's not allowed to use even number
  elasticsearchDataReplicas: 1     # total number of data nodes
  elasticsearchMasterVolumeSize: 4Gi   # Volume size of Elasticsearch master nodes
  elasticsearchDataVolumeSize: 20Gi    # Volume size of Elasticsearch data nodes
  logMaxAge: 7                     # Log retention time in built-in Elasticsearch, it is 7 days by default.
  elkPrefix: logstash              # The string making up index names. The index name will be formatted as ks-<elk_prefix>-log
  externalElasticsearchUrl: # The URL of external Elasticsearch
  externalElasticsearchPort: # The port of external Elasticsearch
  1. Execute the following command to start installation:
kubectl apply -f cluster-configuration.yaml

Enable Events after Installation

  1. Log in the console as admin. Click Platform in the top-left corner and select Clusters Management.

clusters-management

  1. Click CRDs and enter clusterconfiguration in the search bar. Click the result to view its detailed page.

Info

A Custom Resource Definition (CRD) allows users to create a new type of resources without adding another API server. They can use these resources like any other native Kubernetes objects.
  1. In Resource List, click the three dots on the right of ks-installer and select Edit YAML.

edit-yaml

  1. In this yaml file, navigate to events and change false to true for enabled. After you finish, click Update in the bottom-right corner to save the configuration.
events:
    enabled: true # Change "false" to "true"

Note

By default, Elasticsearch will be installed internally if Events is enabled. For a production environment, it is highly recommended that you set the following value in this yaml file if you want to enable Events, especially externalElasticsearchUrl and externalElasticsearchPort. Once you provide the following information, KubeSphere will integrate your external Elasticsearch directly instead of installing an internal one.
es:  # Storage backend for logging, tracing, events and auditing.
  elasticsearchMasterReplicas: 1   # total number of master nodes, it's not allowed to use even number
  elasticsearchDataReplicas: 1     # total number of data nodes
  elasticsearchMasterVolumeSize: 4Gi   # Volume size of Elasticsearch master nodes
  elasticsearchDataVolumeSize: 20Gi    # Volume size of Elasticsearch data nodes
  logMaxAge: 7                     # Log retention time in built-in Elasticsearch, it is 7 days by default.
  elkPrefix: logstash              # The string making up index names. The index name will be formatted as ks-<elk_prefix>-log
  externalElasticsearchUrl: # The URL of external Elasticsearch
  externalElasticsearchPort: # The port of external Elasticsearch
  1. You can use the web kubectl to check the installation process by executing the following command:
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f

Tip

You can find the web kubectl tool by clicking the hammer icon in the bottom-right corner of the console.

Verify the Installation of Component

If you enable both Logging and Events, you can check the status of Events in Logging in Components. You may see an image as follows:

events

If you only enable Events without Logging installed, you cannot see the image above as the button Logging will not display.

Execute the following command to check the status of pods:

kubectl get pod -n kubesphere-logging-system

The output may look as follows if the component runs successfully:

NAME                                  READY   STATUS    RESTARTS   AGE
elasticsearch-logging-data-0          1/1     Running   0          11m
elasticsearch-logging-data-1          1/1     Running   0          6m48s
elasticsearch-logging-discovery-0     1/1     Running   0          11m
fluent-bit-ljlsl                      1/1     Running   0          6m30s
fluentbit-operator-5bf7687b88-85vxv   1/1     Running   0          11m
ks-events-exporter-5cb959c74b-rc4lm   2/2     Running   0          7m1s
ks-events-operator-7d46fcccc9-8vvsh   1/1     Running   0          10m
ks-events-ruler-97f756879-lg65t       2/2     Running   0          7m1s
ks-events-ruler-97f756879-ptbkr       2/2     Running   0          7m1s