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Fabricating configs (for now, subnets only) (#299)
Signed-off-by: Ziv Nevo <nevo@il.ibm.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| Copyright 2023- IBM Inc. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package ibm | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/rand" | ||
|
|
||
| "github.com/IBM/vpc-go-sdk/vpcv1" | ||
|
|
||
| "github.com/np-guard/cloud-resource-collector/pkg/common" | ||
| "github.com/np-guard/cloud-resource-collector/pkg/ibm/datamodel" | ||
| "github.com/np-guard/models/pkg/ipblock" | ||
| ) | ||
|
|
||
| const ( | ||
| ipElementSize = 256 | ||
| defaultCidrPrefix = 24 | ||
| maxNumACLsInVPC = 10 | ||
| maxNumRulesInNACL = 10 | ||
| ) | ||
|
|
||
| var ( | ||
| regionsAndZones = map[string][]string{ | ||
| "us-south": {"us-south1", "us-south2", "us-south3"}, | ||
| "us-east": {"us-east1", "us-east2", "us-east3"}, | ||
| } | ||
| uid = map[string]int{} | ||
| availableIPs, _ = ipblock.FromCidrList([]string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"}) | ||
| nACLsOfVPC = map[string][]*datamodel.NetworkACL{} | ||
|
|
||
| vpcType = vpcv1.VPCReferenceResourceTypeVPCConst | ||
| ipv4 = vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllIPVersionIpv4Const | ||
| allProtocols = vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllProtocolAllConst | ||
| ) | ||
|
|
||
| func getUID(resource string) *string { | ||
| res := fmt.Sprintf("%s-%d", resource, uid[resource]) | ||
| uid[resource]++ | ||
| return &res | ||
| } | ||
|
|
||
| func getVPCRef(vpcID *string) *vpcv1.VPCReference { | ||
| return &vpcv1.VPCReference{CRN: vpcID, ID: vpcID, Name: vpcID, ResourceType: &vpcType} | ||
| } | ||
|
|
||
| func chooseRandElem[T any](pool []T) *T { | ||
| return &pool[rand.Intn(len(pool))] //nolint:gosec // weak random is ok here | ||
| } | ||
|
|
||
| func getRandomRegion() string { | ||
| regionNum := rand.Intn(len(regionsAndZones)) //nolint:gosec // weak random is ok here | ||
| i := 0 | ||
| for k := range regionsAndZones { | ||
| if i == regionNum { | ||
| return k | ||
| } | ||
| i++ | ||
| } | ||
| return "" | ||
| } | ||
|
|
||
| func getAvailableInternalCidrBlock() *string { | ||
| prefix := defaultCidrPrefix - rand.Intn(2) //nolint:gosec // weak random is ok here | ||
| baseIP := availableIPs.FirstIPAddress() | ||
| cidr := fmt.Sprintf("%s/%d", baseIP, prefix) | ||
| cidrIPBlock, _ := ipblock.FromCidr(cidr) | ||
| availableIPs = availableIPs.Subtract(cidrIPBlock) | ||
| return &cidr | ||
| } | ||
|
|
||
| func getRandomCidr() *string { | ||
| var ipElem [4]int | ||
| for i := 0; i < len(ipElem); i++ { | ||
| ipElem[i] = rand.Intn(ipElementSize) //nolint:gosec // weak random is ok here | ||
| } | ||
| prefix := rand.Intn(2) //nolint:gosec // weak random is ok here | ||
| cidr := fmt.Sprintf("%d.%d.%d.%d/%d", ipElem[0], ipElem[1], ipElem[2], ipElem[3], prefix) | ||
| return &cidr | ||
| } | ||
|
|
||
| func makeNACLRules() []vpcv1.NetworkACLRuleItemIntf { | ||
| res := []vpcv1.NetworkACLRuleItemIntf{} | ||
|
|
||
| numRules := rand.Intn(maxNumRulesInNACL) //nolint:gosec // weak random is ok here | ||
| for i := 0; i < numRules; i++ { | ||
| ruleID := getUID("aclRule") | ||
| rule := vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAll{ | ||
| ID: ruleID, | ||
| Name: ruleID, | ||
| Action: chooseRandElem([]string{ | ||
| vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllActionAllowConst, | ||
| vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllActionDenyConst}), | ||
| Direction: chooseRandElem([]string{ | ||
| vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllDirectionInboundConst, | ||
| vpcv1.NetworkACLRuleItemNetworkACLRuleProtocolAllDirectionOutboundConst, | ||
| }), | ||
| Source: getRandomCidr(), | ||
| Destination: getRandomCidr(), | ||
| Protocol: &allProtocols, | ||
| IPVersion: &ipv4, | ||
| } | ||
| res = append(res, &rule) | ||
| } | ||
|
|
||
| return res | ||
| } | ||
|
|
||
| func makeNACLs(vpcID string) []*datamodel.NetworkACL { | ||
| numNacls := rand.Intn(maxNumACLsInVPC) + 1 //nolint:gosec // weak random is ok here | ||
| res := []*datamodel.NetworkACL{} | ||
| for i := 0; i < numNacls; i++ { | ||
| naclID := getUID("nacl") | ||
| sdkNACL := vpcv1.NetworkACL{ID: naclID, CRN: naclID, Name: naclID, VPC: getVPCRef(&vpcID)} | ||
| sdkNACL.Rules = makeNACLRules() | ||
| modelNacl := datamodel.NewNetworkACL(&sdkNACL) | ||
| res = append(res, modelNacl) | ||
| nACLsOfVPC[vpcID] = append(nACLsOfVPC[vpcID], modelNacl) | ||
| } | ||
|
|
||
| return res | ||
| } | ||
|
|
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| func getNACLRef(nacl *datamodel.NetworkACL) *vpcv1.NetworkACLReference { | ||
| return &vpcv1.NetworkACLReference{CRN: nacl.CRN, ID: nacl.ID, Name: nacl.Name} | ||
| } | ||
|
|
||
| func getSubnetRef(subnet *datamodel.Subnet) vpcv1.SubnetReference { | ||
| return vpcv1.SubnetReference{CRN: subnet.CRN, ID: subnet.ID, Name: subnet.Name} | ||
| } | ||
|
|
||
| func (resources *ResourcesContainer) Fabricate(opts *common.FabricateOptions) { | ||
| for i := 0; i < opts.NumVPCs; i++ { | ||
| vpcID := getUID("vpc") | ||
| vpcRegion := getRandomRegion() | ||
| sdkVPC := vpcv1.VPC{ID: vpcID, Name: vpcID, CRN: vpcID} | ||
| vpc := datamodel.NewVPC(&sdkVPC, vpcRegion, nil) | ||
| resources.VpcList = append(resources.VpcList, vpc) | ||
|
|
||
| resources.NetworkACLList = append(resources.NetworkACLList, makeNACLs(*vpcID)...) | ||
|
|
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| zone := vpcv1.ZoneReference{Name: chooseRandElem(regionsAndZones[vpcRegion])} | ||
| for s := 0; s < opts.SubnetsPerVPC; s++ { | ||
| subnetID := getUID("subnet") | ||
| sdkSubnet := vpcv1.Subnet{ID: subnetID, Name: subnetID, CRN: subnetID, VPC: getVPCRef(vpcID), Zone: &zone} | ||
| sdkSubnet.Ipv4CIDRBlock = getAvailableInternalCidrBlock() | ||
| subnetNACL := *chooseRandElem(nACLsOfVPC[*vpcID]) | ||
| sdkSubnet.NetworkACL = getNACLRef(subnetNACL) | ||
| subnet := datamodel.NewSubnet(&sdkSubnet, nil) | ||
| subnetNACL.Subnets = append(subnetNACL.Subnets, getSubnetRef(subnet)) | ||
| resources.SubnetList = append(resources.SubnetList, subnet) | ||
| } | ||
| } | ||
| } |