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| 1 | +/* |
| 2 | +Copyright 2019 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package options |
| 18 | + |
| 19 | +import ( |
| 20 | + "fmt" |
| 21 | + "github.com/spf13/pflag" |
| 22 | + |
| 23 | + endpointsliceconfig "k8s.io/kubernetes/pkg/controller/endpointslice/config" |
| 24 | +) |
| 25 | + |
| 26 | +const ( |
| 27 | + minConcurrentServiceEndpointSyncs = 1 |
| 28 | + maxConcurrentServiceEndpointSyncs = 50 |
| 29 | + minMaxEndpointsPerSlice = 1 |
| 30 | + maxMaxEndpointsPerSlice = 1000 |
| 31 | +) |
| 32 | + |
| 33 | +// EndpointSliceControllerOptions holds the EndpointSliceController options. |
| 34 | +type EndpointSliceControllerOptions struct { |
| 35 | + *endpointsliceconfig.EndpointSliceControllerConfiguration |
| 36 | +} |
| 37 | + |
| 38 | +// AddFlags adds flags related to EndpointSliceController for controller manager to the specified FlagSet. |
| 39 | +func (o *EndpointSliceControllerOptions) AddFlags(fs *pflag.FlagSet) { |
| 40 | + if o == nil { |
| 41 | + return |
| 42 | + } |
| 43 | + |
| 44 | + fs.Int32Var(&o.ConcurrentServiceEndpointSyncs, "concurrent-service-endpoint-syncs", o.ConcurrentServiceEndpointSyncs, "The number of service endpoint syncing operations that will be done concurrently. Larger number = faster endpoint slice updating, but more CPU (and network) load. Defaults to 5.") |
| 45 | + fs.Int32Var(&o.MaxEndpointsPerSlice, "max-endpoints-per-slice", o.MaxEndpointsPerSlice, "The maximum number of endpoints that will be added to an EndpointSlice. More endpoints per slice will result in less endpoint slices, but larger resources. Defaults to 100.") |
| 46 | +} |
| 47 | + |
| 48 | +// ApplyTo fills up EndpointSliceController config with options. |
| 49 | +func (o *EndpointSliceControllerOptions) ApplyTo(cfg *endpointsliceconfig.EndpointSliceControllerConfiguration) error { |
| 50 | + if o == nil { |
| 51 | + return nil |
| 52 | + } |
| 53 | + |
| 54 | + cfg.ConcurrentServiceEndpointSyncs = o.ConcurrentServiceEndpointSyncs |
| 55 | + cfg.MaxEndpointsPerSlice = o.MaxEndpointsPerSlice |
| 56 | + |
| 57 | + return nil |
| 58 | +} |
| 59 | + |
| 60 | +// Validate checks validation of EndpointSliceControllerOptions. |
| 61 | +func (o *EndpointSliceControllerOptions) Validate() []error { |
| 62 | + if o == nil { |
| 63 | + return nil |
| 64 | + } |
| 65 | + |
| 66 | + errs := []error{} |
| 67 | + |
| 68 | + if o.ConcurrentServiceEndpointSyncs < minConcurrentServiceEndpointSyncs { |
| 69 | + errs = append(errs, fmt.Errorf("concurrent-service-endpoint-syncs must not be less than %d, but got %d", minConcurrentServiceEndpointSyncs, o.ConcurrentServiceEndpointSyncs)) |
| 70 | + } else if o.ConcurrentServiceEndpointSyncs > maxConcurrentServiceEndpointSyncs { |
| 71 | + errs = append(errs, fmt.Errorf("concurrent-service-endpoint-syncs must not be more than %d, but got %d", maxConcurrentServiceEndpointSyncs, o.ConcurrentServiceEndpointSyncs)) |
| 72 | + } |
| 73 | + |
| 74 | + if o.MaxEndpointsPerSlice < minMaxEndpointsPerSlice { |
| 75 | + errs = append(errs, fmt.Errorf("max-endpoints-per-slice must not be less than %d, but got %d", minMaxEndpointsPerSlice, o.MaxEndpointsPerSlice)) |
| 76 | + } else if o.MaxEndpointsPerSlice > maxMaxEndpointsPerSlice { |
| 77 | + errs = append(errs, fmt.Errorf("max-endpoints-per-slice must not be more than %d, but got %d", maxMaxEndpointsPerSlice, o.MaxEndpointsPerSlice)) |
| 78 | + } |
| 79 | + |
| 80 | + return errs |
| 81 | +} |
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