Alertmanager supports main stream receivers

• Related issues: #2521 [FEATURE] Alertmanager supports main stream receivers

Category:

• Alter manager

Verification Steps

1. Prepare another VM or machine have the same subnet with the Harvester
2. Prepare a webhook server on the VM, reference to https://github.com/w13915984028/harvester-develop-summary/blob/main/test-log-event-audit-with-webhook-server.md
3. You may need to install python3 web package, refer to https://webpy.org/install
4. Run export PORT=8094 on the webhook server VM
5. Launch the webhook server python3 simple-webhook-server.py

   davidtclin@ubuntu-clean:~$ python3 simple-webhook-server.py
   usage: export PORT=1234 to set http server port number as 1234
   start a simple webhook server, PORT 8094 @ 2022-09-21 16:39:58.706792 
   
   http://0.0.0.0:8094/
   

6. Access Harvester Alertmanager Configs page in Monitoring
7. Create an Alertmanager config
8. Access the created Alertmanager config
9. Click Add receiver
10. Select webhook page
11. Click Add webhook
12. Add `http://server_ip:8094 to the URL
13. Access Harvester node
14. Run kubectl get alertmanagerconfig -A -o yaml
15. Check the webhook server have applied to the Altertmanagerconfig pod
16. Check the webhook receiver can be created

Refer to HEP document for more details https://github.com/w13915984028/harvester/blob/fix2517/enhancements/20220720-alertmanager.md

Expected Results

1. We can add webhook type receiver from the Altermanager Config page for the given namespace

   

2. Can applied the changes to alertmanagerconfig pod in Harveser

   harv0921:~ # kubectl get alertmanagerconfig -A -o yaml
   apiVersion: v1
   items:
   - apiVersion: monitoring.coreos.com/v1alpha1
   kind: AlertmanagerConfig
   metadata:
       creationTimestamp: "2022-09-21T08:16:21Z"
       generation: 1
       name: alert-receiver
       namespace: default
       resourceVersion: "14566"
       uid: 8f9c30a2-42c1-4831-92b5-8abf71134333
   spec:
       receivers: []
       route:
       groupBy: []
       groupInterval: 5m
       groupWait: 30s
       matchers: []
       repeatInterval: 4h
   - apiVersion: monitoring.coreos.com/v1alpha1
   kind: AlertmanagerConfig
   metadata:
       creationTimestamp: "2022-09-21T08:48:38Z"
       generation: 2
       name: alertmanager
       namespace: default
       resourceVersion: "39171"
       uid: 32f813c3-24fd-4faf-a270-1e7723a5dfdf
   spec:
       receivers:
       - name: webhook
       webhookConfigs:
       - httpConfig:
           tlsConfig: {}
           sendResolved: false
           url: http://192.168.122.230:8094
       route:
       groupBy: []
       groupInterval: 5m
       groupWait: 30s
       matchers: []
       repeatInterval: 4h
   kind: List
   metadata:
   resourceVersion: ""
   selfLink: ""