Bug 1539098
| Summary: | Configuring metadata network-interfaces with "iface eth2 inet6 static" breaks all networking on cloud-init instance | ||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | Andreas Karis <akaris> |
| Component: | cloud-init | Assignee: | Ryan McCabe <rmccabe> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Vratislav Hutsky <vhutsky> |
| Severity: | urgent | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.4 | CC: | anthony.mcmahon, eterrell, huzhao, jgreguske, linl, mkalinin, rmccabe, yacao, yuxisun |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-01-11 13:23:51 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Andreas Karis
2018-01-26 16:04:26 UTC
Tested with cloud-init-0.7.9-20.el7.x86_64 I don't believe this is intended to work. Did defining the interface twice previously work for the customer? The current upstream release explicitly errors out when you do this with a parse error. Hi, cloud-init upstrea in cloudinit/net/eni.py https://github.com/number5/cloud-init/blob/master/cloudinit/net/eni.py#L193 ~~~ elif option == "iface": iface, family, method = split[1:4] if iface not in ifaces: ifaces[iface] = { # Include the source path this interface was found in. "_source_path": src_path } elif 'family' in ifaces[iface]: raise ParserError( "Interface %s can only be defined once. " "Re-defined in '%s'." % (iface, src_path)) ifaces[iface]['family'] = family ifaces[iface]['method'] = method currif = iface ~~~ a) iface eth2 inet static b) iface eth2 inet6 static a) iface = eth2 family = inet method = static b) iface = eth2 family = inet6 method = static inet will define ifaces['eth2']['family'] as 'inet' and then on the next pass with inet6, `elif 'family' in ifaces[iface]` will evaluate to true and this throw an error. The actual error message doesn't seem to figure in any of the collected customer data, but from the above, it seems pretty clear that the ENI format accepts only one interface and not different tuples of iface/family. I'm bringing this upstream ... http://cloudinit.readthedocs.io/en/latest/topics/network-config-format-eni.html#network-config-eni states that: ~~~ Please reference existing documentation for the /etc/network/interfaces(5) format. ~~~ From https://manpages.debian.org/jessie/ifupdown/interfaces.5.en.html - the man page doesn't seem to say anything else about duplicate iface declarations with different families: ~~~ Stanzas defining logical interfaces start with a line consisting of the word "iface" followed by the name of the logical interface. In simple configurations without mapping stanzas this name should simply be the name of the physical interface to which it is to be applied. (The default mapping script is, in effect, the echo command.) The interface name is followed by the name of the address family that the interface uses. This will be "inet" for TCP/IP networking, but there is also some support for IPX networking ("ipx"), and IPv6 networking ("inet6"). Following that is the name of the method used to configure the interface. (...) ~~~ According to https://wiki.debian.org/NetworkConfiguration , this should work, though: ~~~ If you're configuring it manually then something like this will set the default gateway (network, broadcast and gateway are optional): auto eth0 iface eth0 inet static address 192.0.2.7 netmask 255.255.255.0 gateway 192.0.2.254 If you want to add an IPv6 address, too, append something like: iface eth0 inet6 static address 2001:db8::c0ca:1eaf netmask 64 gateway 2001:db8::1ead:ed:beef ~~~ |