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This commit is contained in:
Nick Sardo 2017-04-18 15:35:38 -07:00
parent df02b82481
commit 8dc19e0066
2 changed files with 47 additions and 4 deletions
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44
controllers/gce/cmd/mode-updater/README.md
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@ -41,6 +41,50 @@ go run main.go my-project us-central1 RATE
go run main.go my-project us-central1 UTILIZATION
```
**Example Run**
```shell
➜ go run mode-updater.go nicksardo-project us-central1 RATE
Backend-Service BalancingMode Updater 0.1
Backend Services:
- k8s-be-31165--c4424dd5f02d3cad
- k8s-be-31696--c4424dd5f02d3cad
Instance Groups:
- k8s-ig--c4424dd5f02d3cad (us-central1-a)
Step 1: Creating temporary instance groups in relevant zones
- k8s-ig--migrate (us-central1-a)
Step 2: Update backend services to point to original and temporary instance groups
- k8s-be-31165--c4424dd5f02d3cad
- k8s-be-31696--c4424dd5f02d3cad
Step 3: Migrate instances to temporary group
- kubernetes-minion-group-f060 (us-central1-a): removed from k8s-ig--c4424dd5f02d3cad, added to k8s-ig--migrate
- kubernetes-minion-group-pnbl (us-central1-a): removed from k8s-ig--c4424dd5f02d3cad, added to k8s-ig--migrate
- kubernetes-minion-group-t6dl (us-central1-a): removed from k8s-ig--c4424dd5f02d3cad, added to k8s-ig--migrate
Step 4: Update backend services to point only to temporary instance groups
- k8s-be-31165--c4424dd5f02d3cad
- k8s-be-31696--c4424dd5f02d3cad
Step 5: Update backend services to point to both temporary and original (with new balancing mode) instance groups
- k8s-be-31165--c4424dd5f02d3cad
- k8s-be-31696--c4424dd5f02d3cad
Step 6: Migrate instances back to original groups
- kubernetes-minion-group-f060 (us-central1-a): removed from k8s-ig--migrate, added to k8s-ig--c4424dd5f02d3cad
- kubernetes-minion-group-pnbl (us-central1-a): removed from k8s-ig--migrate, added to k8s-ig--c4424dd5f02d3cad
- kubernetes-minion-group-t6dl (us-central1-a): removed from k8s-ig--migrate, added to k8s-ig--c4424dd5f02d3cad
Step 7: Update backend services to point only to original instance groups
- k8s-be-31165--c4424dd5f02d3cad
- k8s-be-31696--c4424dd5f02d3cad
Step 8: Delete temporary instance groups
- k8s-ig--migrate (us-central1-a)
```
#### How the updater works
1. Create temporary instance groups `k8s-ig-migrate` in each zone where a `k8s-ig-{cluster_id}` exists.
1. Update all backend-services to point to both original and temporary instance groups (mode of the new backend doesn't matter)

7
controllers/gce/cmd/mode-updater/mode-updater.go
View file

@ -36,15 +36,14 @@ const (
balancingModeRATE = "RATE"
balancingModeUTIL = "UTILIZATION"
operationPollInterval = 3 * time.Second
// Creating Route in very large clusters, may take more than half an hour.
operationPollInterval = 3 * time.Second
operationPollTimeoutDuration = time.Hour
version = 0.1
version = 0.1
)
func main() {
fmt.Println("Backend-Service BalancingMode Updater", version)
//flag.Usage
flag.Parse()
args := flag.Args()