From 2aaf99dd0ad23266a09e8be87087fa08c89d3f3e Mon Sep 17 00:00:00 2001 From: akunszt <32456696+akunszt@users.noreply.github.com> Date: Thu, 20 Jun 2024 15:36:20 +0200 Subject: [PATCH] discovery: aws: expose Primary IPv6 addresses as label, partially fixes #7406 (#14156) * discovery: aws: expose Primary IPv6 addresses as label Add __meta_ec2_primary_ipv6_addresses label. This label contains the Primary IPv6 address for every ENI attached to the EC2 instance. It is ordered by the DeviceIndex and the missing elements (interface without Primary IPv6 address) are kept in the list. --------- Signed-off-by: Arpad Kunszt Co-authored-by: Ayoub Mrini --- discovery/aws/ec2.go | 61 ++++++++++++++++++----------- docs/configuration/configuration.md | 1 + 2 files changed, 40 insertions(+), 22 deletions(-) diff --git a/discovery/aws/ec2.go b/discovery/aws/ec2.go index a6a0a8257..a44912481 100644 --- a/discovery/aws/ec2.go +++ b/discovery/aws/ec2.go @@ -42,28 +42,29 @@ import ( ) const ( - ec2Label = model.MetaLabelPrefix + "ec2_" - ec2LabelAMI = ec2Label + "ami" - ec2LabelAZ = ec2Label + "availability_zone" - ec2LabelAZID = ec2Label + "availability_zone_id" - ec2LabelArch = ec2Label + "architecture" - ec2LabelIPv6Addresses = ec2Label + "ipv6_addresses" - ec2LabelInstanceID = ec2Label + "instance_id" - ec2LabelInstanceLifecycle = ec2Label + "instance_lifecycle" - ec2LabelInstanceState = ec2Label + "instance_state" - ec2LabelInstanceType = ec2Label + "instance_type" - ec2LabelOwnerID = ec2Label + "owner_id" - ec2LabelPlatform = ec2Label + "platform" - ec2LabelPrimarySubnetID = ec2Label + "primary_subnet_id" - ec2LabelPrivateDNS = ec2Label + "private_dns_name" - ec2LabelPrivateIP = ec2Label + "private_ip" - ec2LabelPublicDNS = ec2Label + "public_dns_name" - ec2LabelPublicIP = ec2Label + "public_ip" - ec2LabelRegion = ec2Label + "region" - ec2LabelSubnetID = ec2Label + "subnet_id" - ec2LabelTag = ec2Label + "tag_" - ec2LabelVPCID = ec2Label + "vpc_id" - ec2LabelSeparator = "," + ec2Label = model.MetaLabelPrefix + "ec2_" + ec2LabelAMI = ec2Label + "ami" + ec2LabelAZ = ec2Label + "availability_zone" + ec2LabelAZID = ec2Label + "availability_zone_id" + ec2LabelArch = ec2Label + "architecture" + ec2LabelIPv6Addresses = ec2Label + "ipv6_addresses" + ec2LabelInstanceID = ec2Label + "instance_id" + ec2LabelInstanceLifecycle = ec2Label + "instance_lifecycle" + ec2LabelInstanceState = ec2Label + "instance_state" + ec2LabelInstanceType = ec2Label + "instance_type" + ec2LabelOwnerID = ec2Label + "owner_id" + ec2LabelPlatform = ec2Label + "platform" + ec2LabelPrimaryIPv6Addresses = ec2Label + "primary_ipv6_addresses" + ec2LabelPrimarySubnetID = ec2Label + "primary_subnet_id" + ec2LabelPrivateDNS = ec2Label + "private_dns_name" + ec2LabelPrivateIP = ec2Label + "private_ip" + ec2LabelPublicDNS = ec2Label + "public_dns_name" + ec2LabelPublicIP = ec2Label + "public_ip" + ec2LabelRegion = ec2Label + "region" + ec2LabelSubnetID = ec2Label + "subnet_id" + ec2LabelTag = ec2Label + "tag_" + ec2LabelVPCID = ec2Label + "vpc_id" + ec2LabelSeparator = "," ) // DefaultEC2SDConfig is the default EC2 SD configuration. @@ -317,6 +318,7 @@ func (d *EC2Discovery) refresh(ctx context.Context) ([]*targetgroup.Group, error var subnets []string var ipv6addrs []string + var primaryipv6addrs []string subnetsMap := make(map[string]struct{}) for _, eni := range inst.NetworkInterfaces { if eni.SubnetId == nil { @@ -330,6 +332,15 @@ func (d *EC2Discovery) refresh(ctx context.Context) ([]*targetgroup.Group, error for _, ipv6addr := range eni.Ipv6Addresses { ipv6addrs = append(ipv6addrs, *ipv6addr.Ipv6Address) + if *ipv6addr.IsPrimaryIpv6 { + // we might have to extend the slice with more than one element + // that could leave empty strings in the list which is intentional + // to keep the position/device index information + for int64(len(primaryipv6addrs)) <= *eni.Attachment.DeviceIndex { + primaryipv6addrs = append(primaryipv6addrs, "") + } + primaryipv6addrs[*eni.Attachment.DeviceIndex] = *ipv6addr.Ipv6Address + } } } labels[ec2LabelSubnetID] = model.LabelValue( @@ -342,6 +353,12 @@ func (d *EC2Discovery) refresh(ctx context.Context) ([]*targetgroup.Group, error strings.Join(ipv6addrs, ec2LabelSeparator) + ec2LabelSeparator) } + if len(primaryipv6addrs) > 0 { + labels[ec2LabelPrimaryIPv6Addresses] = model.LabelValue( + ec2LabelSeparator + + strings.Join(primaryipv6addrs, ec2LabelSeparator) + + ec2LabelSeparator) + } } for _, t := range inst.Tags { diff --git a/docs/configuration/configuration.md b/docs/configuration/configuration.md index 5df7dae3c..164f426ad 100644 --- a/docs/configuration/configuration.md +++ b/docs/configuration/configuration.md @@ -1229,6 +1229,7 @@ The following meta labels are available on targets during [relabeling](#relabel_ * `__meta_ec2_ipv6_addresses`: comma separated list of IPv6 addresses assigned to the instance's network interfaces, if present * `__meta_ec2_owner_id`: the ID of the AWS account that owns the EC2 instance * `__meta_ec2_platform`: the Operating System platform, set to 'windows' on Windows servers, absent otherwise +* `__meta_ec2_primary_ipv6_addresses`: comma separated list of the Primary IPv6 addresses of the instance, if present. The list is ordered based on the position of each corresponding network interface in the attachment order. * `__meta_ec2_primary_subnet_id`: the subnet ID of the primary network interface, if available * `__meta_ec2_private_dns_name`: the private DNS name of the instance, if available * `__meta_ec2_private_ip`: the private IP address of the instance, if present