CI script to update fleet reset values

[manno]

Still seeing problems with https://github.com/rancher/fleet/actions/workflows/rancher-upgrade-fleet-to-head.yml

Values handling changed in recent Helm versions, maybe that's related. Using the new switch --reset-then-reuse-values:

when upgrading, reset the values to the ones built into the chart, apply the last release's values and merge in any overrides from the command line via --set and -f. If '--reset-values' or '--reuse-values' is specified, this is ignored

[weyfonk]

My confidence in this as a fix is pretty low... but this is worth trying :)
Edit: this doesn't seem to fix anything though, right?

[manno]

Notes on --reset-then-reuse-values

Without --reset-then-reuse-values the upgrade script will change the helm values.
As seen some important values are removed:

-==== values before upgrade ====
+==== values after upgrade ====
 COMPUTED VALUES:
 agentCheckinInterval: 15m
 agentImage:
   imagePullPolicy: IfNotPresent
   repository: rancher/fleet-agent
-  tag: v0.9.0
-apiServerCA: |-
-  -----BEGIN CERTIFICATE-----
- [...]
-  -----END CERTIFICATE-----
-apiServerURL: https://172.19.0.1.xip.io
+  tag: dev
+apiServerCA: ""
+apiServerURL: ""
 bootstrap:
-  agentNamespace: cattle-fleet-local-system
+  agentNamespace: ""
   branch: master
-  enabled: false
+  enabled: true
   namespace: fleet-local
   paths: ""
   repo: ""
   secret: ""
 debug: false
 debugLevel: 0
-gitjob:
-  debug: false
-  gitjob:
-    repository: rancher/gitjob
-    tag: v0.1.96
-  global:
-    cattle:
-      systemDefaultRegistry: ""
-  noProxy: 127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,.svc,.cluster.local
-  nodeSelector:
-    kubernetes.io/os: linux
-  priorityClassName: rancher-critical
-  tolerations:
-  - effect: NoSchedule
-    key: cattle.io/os
-    operator: Equal
-    value: linux
 gitops:
   enabled: true
 global:
@@ -55,11 +26,15 @@ ignoreClusterRegistrationLabels: false
 image:
   imagePullPolicy: IfNotPresent
   repository: rancher/fleet
-  tag: v0.9.0
+  tag: dev
+leaderElection:
+  leaseDuration: 30s
+  renewDeadline: 25s
+  retryPeriod: 10s
 migrations:
   clusterRegistrationCleanup: true
 noProxy: 127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,.svc,.cluster.local
 nodeSelector: {}
-priorityClassName: rancher-critical
+priorityClassName: ""
 propagateDebugSettingsToAgents: true
 tolerations: []

With --reset-then-reuse-values only the values from the update change:

-==== values before upgrade ====
+==== values after upgrade ====
 COMPUTED VALUES:
 agentCheckinInterval: 15m
 agentImage:
   imagePullPolicy: IfNotPresent
   repository: rancher/fleet-agent
-  tag: v0.9.0
+  tag: dev
 apiServerCA: |-
   -----BEGIN CERTIFICATE-----
   MIIBvjCCAWOgAwIBAgIBADAKBggqhkjOPQQDAjBGMRwwGgYDVQQKExNkeW5hbWlj
@@ -30,22 +30,7 @@ bootstrap:
 debug: false
 debugLevel: 0
 gitjob:
-  debug: false
-  gitjob:
-    repository: rancher/gitjob
-    tag: v0.1.96
-  global:
-    cattle:
-      systemDefaultRegistry: ""
-  noProxy: 127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,.svc,.cluster.local
-  nodeSelector:
-    kubernetes.io/os: linux
   priorityClassName: rancher-critical
-  tolerations:
-  - effect: NoSchedule
-    key: cattle.io/os
-    operator: Equal
-    value: linux
 gitops:
   enabled: true
 global:
@@ -55,7 +40,11 @@ ignoreClusterRegistrationLabels: false
 image:
   imagePullPolicy: IfNotPresent
   repository: rancher/fleet
-  tag: v0.9.0
+  tag: dev
+leaderElection:
+  leaseDuration: 30s
+  renewDeadline: 25s
+  retryPeriod: 10s
 migrations:
   clusterRegistrationCleanup: true
 noProxy: 127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,.svc,.cluster.local

[manno]

This is green now: https://github.com/rancher/fleet/actions/runs/8556611140