Support IPv6 addresses during fingerprinting #2536
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Can we special case loopback:
"Resources": {
"CPU": 8709,
"DiskMB": 32814,
"IOPS": 0,
"MemoryMB": 2000,
"Networks": [
{
"CIDR": "127.0.0.1/32",
"DynamicPorts": null,
"IP": "127.0.0.1",
"MBits": 1000,
"Public": false,
"ReservedPorts": null
},
{
"CIDR": "::1/128",
"DynamicPorts": null,
"IP": "::1",
"MBits": 1000,
"Public": false,
"ReservedPorts": null
}
]
},
client/fingerprint/network.go
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| // Add the network resources to the node | ||
| for _, nwResource := range nwResources { | ||
| node.Resources.Networks = append(node.Resources.Networks, nwResource) | ||
| f.logger.Printf("[DEBUG] fingerprint.network: Detected interface %v with IP: %v, CIDR: %v during fingerprinting", |
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Remove during fingerprinting. The prefix is fingerprint.network :)
client/fingerprint/network.go
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| var ip net.IP | ||
| switch v := (addr).(type) { | ||
| case *net.IPNet: | ||
| ip = v.IP | ||
| newNetwork.IP = v.IP.String() |
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Doesn't this get overrides right below?
client/fingerprint/network.go
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| node.Resources.Networks = append(node.Resources.Networks, newNetwork) | ||
| // Add the network resources to the node | ||
| for _, nwResource := range nwResources { | ||
| node.Resources.Networks = append(node.Resources.Networks, nwResource) |
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node.Resources.Networks = nwResource outside of the loop?
| case *net.IPAddr: | ||
| ip = v.IP | ||
| } | ||
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| // If the ip is link-local then we ignore it | ||
| if ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() { |
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Can we get a test around these and IPv4/6 CIDRs
| return false, fmt.Errorf("Unable to find IP address of interface: %s, err: %v", intf.Name, err) | ||
| } | ||
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| newNetwork.Device = intf.Name |
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@dadgar Look at https://github.com/hashicorp/nomad/pull/2536/files#diff-e2a9235d588163b6bfb8e29d322e7e84R117 where we are initializing the structs.NetworkResource
client/fingerprint/network.go
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| @@ -95,6 +95,7 @@ func (f *NetworkFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) | |||
| f.logger.Printf("[DEBUG] fingerprint.network: Detected interface %v with IP: %v", intf.Name, nwResource.IP) | |||
| } | |||
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| // Deprectaed, setting the first IP as unique IP for the node | |||
diptanu
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I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions. |
This enables the Nomad fingerprinter to pick up IPv6 addresses. Once this is merged I will add a note in the documentation that Nomad may pick either an IPv4 or an IPv6 address on a dual stack system if an interface has both ipv4 and ipv6 addresses.