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Update network alias of a gcp instance from metadata
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| package main | |
| import ( | |
| "log" | |
| "os" | |
| "golang.org/x/net/context" | |
| "golang.org/x/oauth2/google" | |
| "google.golang.org/api/compute/v1" | |
| ) | |
| func main() { | |
| ctx := context.Background() | |
| c, err := google.DefaultClient(ctx, compute.CloudPlatformScope) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| computeService, err := compute.New(c) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| arguments := os.Args[1:] | |
| project := arguments[0] | |
| zone := arguments[1] | |
| instance := arguments[2] | |
| cidrName := arguments[3] | |
| cidr := arguments[4] | |
| info, err := computeService.Instances.Get(project, zone, instance).Context(ctx).Do() | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| fingerprint := info.NetworkInterfaces[0].Fingerprint | |
| var aliasIpRanges []*compute.AliasIpRange | |
| aliasIpRange := &compute.AliasIpRange{IpCidrRange: cidr, SubnetworkRangeName: cidrName} | |
| aliasIpRanges = append(aliasIpRanges, aliasIpRange) | |
| rb := &compute.NetworkInterface{AliasIpRanges: aliasIpRanges, Fingerprint: fingerprint} | |
| _, err = computeService.Instances.UpdateNetworkInterface(project, zone, instance, "nic0", rb).Context(ctx).Do() | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| } |
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| #!/usr/bin/env bash | |
| export PATH=/root:$PWD:$PATH | |
| export GOOGLE_APPLICATION_CREDENTIALS="${GOOGLE_APPLICATION_CREDENTIALS:-/root/creds.json}" | |
| PROJECT=$(curl -s -H "Metadata-Flavor: Google" http://169.254.169.254/computeMetadata/v1/project/project-id) | |
| ZONE=$(basename $(curl -s -H "Metadata-Flavor: Google" http://169.254.169.254/computeMetadata/v1/instance/zone)) | |
| INSTANCE=$hostname | |
| CIDR_NAME=dual-mynetwork | |
| CIDR=192.168.124.0/25 | |
| updatealias $PROJECT $ZONE $INSTANCE $CIDR_NAME $CIDR |
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