Add leader election #113
Add leader election #113
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Pull Request Test Coverage Report for Build 1052431734
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pkg/storage/kubernetes.go
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| /* | ||
| */ |
pkg/storage/kubernetes.go
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| LeaseDuration: 1500 * time.Millisecond, | ||
| RenewDeadline: 1000 * time.Millisecond, | ||
| RetryPeriod: 500 * time.Millisecond, |
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Can we make it configurable from CNI json config? It might be key for performance tuning.
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Added changes for configurable parameters for lease/renew/retry durations
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| var rl = &resourcelock.LeaseLock{ | ||
| LeaseMeta: metav1.ObjectMeta{ | ||
| Name: "whereabouts", |
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you could potentially use the name of the pool here (perhaps with whereabouts as a prefix), so that allocations in other pools are not also blocked
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I suppose we should use leaselock to lock whole whereabouts, not per ip pool basis because Kubernetes/etcd does not support fine grain lock (because etcd is not DB, just KVS).
| switch ipamConf.Datastore { | ||
| case types.DatastoreETCD: | ||
| ipam, err = NewETCDIPAM(ipamConf) | ||
| case types.DatastoreKubernetes: | ||
| ipam, err = NewKubernetesIPAM(containerID, ipamConf) | ||
| } |
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It seems strange to me to find this switch in the etcd implementation. Shouldn't the correct config be passed as a parameter to the implementations ?
dougbtv
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New commit addresses configurability of the duration parameters, adds defaults based on original code |
pkg/storage/kubernetes.go
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| func IPManagementKubernetesUpdate(mode int, ipam *KubernetesIPAM, ipamConf whereaboutstypes.IPAMConfig, containerID string, podRef string) (net.IPNet, error) { | ||
| logging.Debugf("IPManagement -- mode: %v / containerID: %v / podRef: %v", mode, containerID, podRef) | ||
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| now := time.Now() |
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Please remove this because it is only for debug purpose.
pkg/storage/kubernetes.go
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| //XXX | ||
| logging.Debugf("Took: %vms\n", time.Since(now).Milliseconds()) |
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Please remove this because it is only for debug purpose.
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Right! And this line causes the openshift img build failure, since it uses golang-1.12 - time.Milliseconds is available on golang >= 1.13 as per https://golang.org/pkg/time/#Duration.Milliseconds
…e lease durations
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Uses
k8s.io/client-go/tools/leaderelectionto add leader election to choose a leader during CRD read/write in order to properly handle concurrency before ippools are calculated and modified.