810 lines
19 KiB
Go
810 lines
19 KiB
Go
package scheduler
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import (
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"testing"
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"fmt"
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"github.com/hashicorp/nomad/helper/uuid"
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"github.com/hashicorp/nomad/nomad/mock"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/stretchr/testify/require"
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)
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func TestResourceDistance(t *testing.T) {
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resourceAsk := &structs.ComparableResources{
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Flattened: structs.AllocatedTaskResources{
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 2048,
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},
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 512,
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},
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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MBits: 1024,
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},
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},
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},
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Shared: structs.AllocatedSharedResources{
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DiskMB: 4096,
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},
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}
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type testCase struct {
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allocResource *structs.ComparableResources
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expectedDistance string
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}
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testCases := []*testCase{
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{
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&structs.ComparableResources{
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Flattened: structs.AllocatedTaskResources{
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 2048,
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},
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 512,
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},
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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MBits: 1024,
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},
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},
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},
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Shared: structs.AllocatedSharedResources{
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DiskMB: 4096,
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},
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},
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"0.000",
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},
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{
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&structs.ComparableResources{
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Flattened: structs.AllocatedTaskResources{
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 1024,
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},
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 400,
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},
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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MBits: 1024,
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},
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},
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},
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Shared: structs.AllocatedSharedResources{
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DiskMB: 1024,
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},
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},
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"0.928",
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},
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{
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&structs.ComparableResources{
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Flattened: structs.AllocatedTaskResources{
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 8192,
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},
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 200,
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},
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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MBits: 512,
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},
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},
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},
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Shared: structs.AllocatedSharedResources{
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DiskMB: 1024,
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},
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},
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"3.152",
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},
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{
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&structs.ComparableResources{
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Flattened: structs.AllocatedTaskResources{
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 2048,
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},
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 500,
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},
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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MBits: 1024,
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},
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},
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},
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Shared: structs.AllocatedSharedResources{
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DiskMB: 4096,
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},
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},
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"0.023",
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},
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}
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for _, tc := range testCases {
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t.Run("", func(t *testing.T) {
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require := require.New(t)
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actualDistance := fmt.Sprintf("%3.3f", basicResourceDistance(resourceAsk, tc.allocResource))
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require.Equal(tc.expectedDistance, actualDistance)
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})
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}
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}
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func TestPreemption(t *testing.T) {
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type testCase struct {
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desc string
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currentAllocations []*structs.Allocation
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nodeReservedCapacity *structs.Resources
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nodeCapacity *structs.Resources
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resourceAsk *structs.Resources
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jobPriority int
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currentPreemptions []*structs.Allocation
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preemptedAllocIDs map[string]struct{}
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}
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highPrioJob := mock.Job()
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highPrioJob.Priority = 100
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lowPrioJob := mock.Job()
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lowPrioJob.Priority = 30
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lowPrioJob2 := mock.Job()
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lowPrioJob2.Priority = 30
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// Create some persistent alloc ids to use in test cases
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allocIDs := []string{uuid.Generate(), uuid.Generate(), uuid.Generate(), uuid.Generate(), uuid.Generate()}
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nodeResources := &structs.Resources{
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CPU: 4000,
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MemoryMB: 8192,
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DiskMB: 100 * 1024,
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IOPS: 150,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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CIDR: "192.168.0.100/32",
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MBits: 1000,
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},
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},
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}
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reservedNodeResources := &structs.Resources{
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CPU: 100,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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ReservedPorts: []structs.Port{{Label: "ssh", Value: 22}},
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MBits: 1,
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},
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},
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}
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testCases := []testCase{
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{
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desc: "No preemption because existing allocs are not low priority",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 3200,
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MemoryMB: 7256,
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DiskMB: 4 * 1024,
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IOPS: 150,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 50,
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},
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},
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})},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 2000,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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ReservedPorts: []structs.Port{{Label: "ssh", Value: 22}},
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MBits: 1,
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},
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},
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},
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},
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{
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desc: "Preempting low priority allocs not enough to meet resource ask",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], lowPrioJob, &structs.Resources{
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CPU: 3200,
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MemoryMB: 7256,
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DiskMB: 4 * 1024,
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IOPS: 150,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 50,
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},
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},
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})},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 4000,
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MemoryMB: 8192,
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DiskMB: 4 * 1024,
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IOPS: 300,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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ReservedPorts: []structs.Port{{Label: "ssh", Value: 22}},
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MBits: 1,
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},
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},
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},
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},
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{
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desc: "Combination of high/low priority allocs, without static ports",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 2800,
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MemoryMB: 2256,
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DiskMB: 4 * 1024,
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IOPS: 150,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 150,
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},
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},
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}),
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createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.200",
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MBits: 500,
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},
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},
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}),
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createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 300,
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},
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},
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}),
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createAlloc(allocIDs[3], lowPrioJob, &structs.Resources{
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CPU: 700,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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}),
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},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 1100,
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MemoryMB: 1000,
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DiskMB: 25 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 840,
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},
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},
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},
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preemptedAllocIDs: map[string]struct{}{
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allocIDs[1]: {},
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allocIDs[2]: {},
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allocIDs[3]: {},
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},
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}, {
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desc: "Preemption needed for all resources except network",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 2800,
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MemoryMB: 2256,
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DiskMB: 40 * 1024,
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IOPS: 100,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 150,
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},
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},
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}),
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createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.200",
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MBits: 50,
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},
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},
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}),
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createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 512,
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DiskMB: 25 * 1024,
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}),
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createAlloc(allocIDs[3], lowPrioJob, &structs.Resources{
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CPU: 700,
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MemoryMB: 276,
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DiskMB: 20 * 1024,
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}),
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},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 1000,
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MemoryMB: 3000,
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DiskMB: 50 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 50,
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},
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},
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},
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preemptedAllocIDs: map[string]struct{}{
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allocIDs[1]: {},
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allocIDs[2]: {},
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allocIDs[3]: {},
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},
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},
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{
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desc: "Only one low priority alloc needs to be preempted",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 1200,
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MemoryMB: 2256,
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DiskMB: 4 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 150,
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},
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},
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}),
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createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 500,
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},
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},
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}),
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createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.200",
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MBits: 320,
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},
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},
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}),
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},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 300,
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MemoryMB: 500,
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DiskMB: 5 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 320,
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},
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},
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},
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preemptedAllocIDs: map[string]struct{}{
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allocIDs[2]: {},
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},
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},
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{
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desc: "one alloc meets static port need, another meets remaining mbits needed",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 1200,
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MemoryMB: 2256,
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DiskMB: 4 * 1024,
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IOPS: 150,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 150,
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},
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},
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}),
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createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.200",
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MBits: 500,
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ReservedPorts: []structs.Port{
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{
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Label: "db",
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Value: 88,
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},
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},
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},
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},
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}),
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createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 200,
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},
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},
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}),
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},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 2700,
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MemoryMB: 1000,
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DiskMB: 25 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 800,
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ReservedPorts: []structs.Port{
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{
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Label: "db",
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Value: 88,
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},
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},
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},
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},
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},
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preemptedAllocIDs: map[string]struct{}{
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allocIDs[1]: {},
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allocIDs[2]: {},
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},
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},
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{
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desc: "alloc that meets static port need also meets other needds",
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currentAllocations: []*structs.Allocation{
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createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
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CPU: 1200,
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MemoryMB: 2256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 150,
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},
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},
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}),
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createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.200",
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MBits: 600,
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ReservedPorts: []structs.Port{
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{
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Label: "db",
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Value: 88,
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},
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},
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},
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},
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}),
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createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
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CPU: 200,
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MemoryMB: 256,
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DiskMB: 4 * 1024,
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IOPS: 50,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 100,
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},
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},
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}),
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},
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nodeReservedCapacity: reservedNodeResources,
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nodeCapacity: nodeResources,
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jobPriority: 100,
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resourceAsk: &structs.Resources{
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CPU: 600,
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MemoryMB: 1000,
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DiskMB: 25 * 1024,
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Networks: []*structs.NetworkResource{
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{
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Device: "eth0",
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IP: "192.168.0.100",
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MBits: 700,
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ReservedPorts: []structs.Port{
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{
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Label: "db",
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Value: 88,
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},
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},
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},
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},
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},
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preemptedAllocIDs: map[string]struct{}{
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|
allocIDs[1]: {},
|
|
},
|
|
},
|
|
{
|
|
desc: "alloc from job that has existing evictions not chosen for preemption",
|
|
currentAllocations: []*structs.Allocation{
|
|
createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
|
|
CPU: 1200,
|
|
MemoryMB: 2256,
|
|
DiskMB: 4 * 1024,
|
|
IOPS: 50,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 150,
|
|
},
|
|
},
|
|
}),
|
|
createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
|
|
CPU: 200,
|
|
MemoryMB: 256,
|
|
DiskMB: 4 * 1024,
|
|
IOPS: 10,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.200",
|
|
MBits: 500,
|
|
},
|
|
},
|
|
}),
|
|
createAlloc(allocIDs[2], lowPrioJob2, &structs.Resources{
|
|
CPU: 200,
|
|
MemoryMB: 256,
|
|
DiskMB: 4 * 1024,
|
|
IOPS: 10,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 300,
|
|
},
|
|
},
|
|
}),
|
|
},
|
|
nodeReservedCapacity: reservedNodeResources,
|
|
nodeCapacity: nodeResources,
|
|
jobPriority: 100,
|
|
resourceAsk: &structs.Resources{
|
|
CPU: 300,
|
|
MemoryMB: 500,
|
|
DiskMB: 5 * 1024,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 320,
|
|
},
|
|
},
|
|
},
|
|
currentPreemptions: []*structs.Allocation{
|
|
createAlloc(allocIDs[4], lowPrioJob2, &structs.Resources{
|
|
CPU: 200,
|
|
MemoryMB: 256,
|
|
DiskMB: 4 * 1024,
|
|
IOPS: 10,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 300,
|
|
},
|
|
},
|
|
}),
|
|
},
|
|
preemptedAllocIDs: map[string]struct{}{
|
|
allocIDs[1]: {},
|
|
},
|
|
},
|
|
// This test case exercises the code path for a final filtering step that tries to
|
|
// minimize the number of preemptible allocations
|
|
{
|
|
desc: "Filter out allocs whose resource usage superset is also in the preemption list",
|
|
currentAllocations: []*structs.Allocation{
|
|
createAlloc(allocIDs[0], highPrioJob, &structs.Resources{
|
|
CPU: 1800,
|
|
MemoryMB: 2256,
|
|
DiskMB: 4 * 1024,
|
|
IOPS: 50,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 150,
|
|
},
|
|
},
|
|
}),
|
|
createAlloc(allocIDs[1], lowPrioJob, &structs.Resources{
|
|
CPU: 1500,
|
|
MemoryMB: 256,
|
|
DiskMB: 5 * 1024,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 100,
|
|
},
|
|
},
|
|
}),
|
|
createAlloc(allocIDs[2], lowPrioJob, &structs.Resources{
|
|
CPU: 600,
|
|
MemoryMB: 256,
|
|
DiskMB: 5 * 1024,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.200",
|
|
MBits: 300,
|
|
},
|
|
},
|
|
}),
|
|
},
|
|
nodeReservedCapacity: reservedNodeResources,
|
|
nodeCapacity: nodeResources,
|
|
jobPriority: 100,
|
|
resourceAsk: &structs.Resources{
|
|
CPU: 1000,
|
|
MemoryMB: 256,
|
|
DiskMB: 5 * 1024,
|
|
Networks: []*structs.NetworkResource{
|
|
{
|
|
Device: "eth0",
|
|
IP: "192.168.0.100",
|
|
MBits: 50,
|
|
},
|
|
},
|
|
},
|
|
preemptedAllocIDs: map[string]struct{}{
|
|
allocIDs[1]: {},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.desc, func(t *testing.T) {
|
|
node := mock.Node()
|
|
node.Resources = tc.nodeCapacity
|
|
node.Reserved = tc.nodeReservedCapacity
|
|
|
|
state, ctx := testContext(t)
|
|
nodes := []*RankedNode{
|
|
{
|
|
Node: node,
|
|
},
|
|
}
|
|
state.UpsertNode(1000, node)
|
|
for _, alloc := range tc.currentAllocations {
|
|
alloc.NodeID = node.ID
|
|
}
|
|
require := require.New(t)
|
|
err := state.UpsertAllocs(1001, tc.currentAllocations)
|
|
|
|
require.Nil(err)
|
|
if tc.currentPreemptions != nil {
|
|
ctx.plan.NodePreemptions[node.ID] = tc.currentPreemptions
|
|
}
|
|
static := NewStaticRankIterator(ctx, nodes)
|
|
binPackIter := NewBinPackIterator(ctx, static, true, tc.jobPriority)
|
|
|
|
taskGroup := &structs.TaskGroup{
|
|
EphemeralDisk: &structs.EphemeralDisk{},
|
|
Tasks: []*structs.Task{
|
|
{
|
|
Name: "web",
|
|
Resources: tc.resourceAsk,
|
|
},
|
|
},
|
|
}
|
|
|
|
binPackIter.SetTaskGroup(taskGroup)
|
|
option := binPackIter.Next()
|
|
if tc.preemptedAllocIDs == nil {
|
|
require.Nil(option)
|
|
} else {
|
|
require.NotNil(option)
|
|
preemptedAllocs := option.PreemptedAllocs
|
|
require.Equal(len(tc.preemptedAllocIDs), len(preemptedAllocs))
|
|
for _, alloc := range preemptedAllocs {
|
|
_, ok := tc.preemptedAllocIDs[alloc.ID]
|
|
require.True(ok)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// helper method to create allocations with given jobs and resources
|
|
func createAlloc(id string, job *structs.Job, resource *structs.Resources) *structs.Allocation {
|
|
alloc := &structs.Allocation{
|
|
ID: id,
|
|
Job: job,
|
|
JobID: job.ID,
|
|
TaskResources: map[string]*structs.Resources{
|
|
"web": resource,
|
|
},
|
|
Resources: resource,
|
|
Namespace: structs.DefaultNamespace,
|
|
EvalID: uuid.Generate(),
|
|
DesiredStatus: structs.AllocDesiredStatusRun,
|
|
ClientStatus: structs.AllocClientStatusRunning,
|
|
TaskGroup: "web",
|
|
}
|
|
return alloc
|
|
}
|