I create a new Windows Server Core 2022 VM and follow <a href="https://docs.microsoft.

Refer: <a class="issue-link js-issue-link" data-error-text="Failed to load title" data

Windows Server run with `--cni` got [ctr: no network config found in /etc/cni/net.d: cni plugin not initialized] error about windows-container-networking HOT 2 CLOSED

microsoft commented on May 22, 2024

Windows Server run with `--cni` got [ctr: no network config found in /etc/cni/net.d: cni plugin not initialized] error

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Comments (2)

lippertmarkus commented on May 22, 2024 2

The symlink setup is only needed for ctr to work, but isn't required for others like crictl or kubelet and that's why that isn't part of the runtime setup script. ctr paths have been changed in https://github.com/containerd/go-cni/pull/103/files#diff-df2b994645f533d6ced46ef610f95cfc41a3cecc099a873a9b47fadccb605b9b

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kkbruce commented on May 22, 2024

Refer: containerd/nerdctl#559 (comment)
Refer: containerd/containerd#6304 (comment)

Create c:\etc\cni directory

PS C:\etc> tree
Folder PATH listing for volume Windows
Volume serial number is 94B1-2EBA
C:.
└───cni
    └───net.d

and create an SYMLINKD net.d [C:\Program Files\containerd\cni\conf]

C:\etc\cni>dir
 Volume in drive C is Windows
 Volume Serial Number is 94B1-2EBA

 Directory of C:\etc\cni

07/15/2022  02:05 AM    <DIR>          .
07/15/2022  02:05 AM    <DIR>          ..
07/15/2022  02:05 AM    <SYMLINKD>     net.d [C:\Program Files\containerd\cni\conf]

Same step create c:\opt\cni and symlinks bin [C:\Program Files\containerd\cni\bin], like:

C:\opt\cni>dir
 Volume in drive C is Windows
 Volume Serial Number is 94B1-2EBA

 Directory of C:\opt\cni

07/15/2022  02:05 AM    <DIR>          .
07/15/2022  02:05 AM    <DIR>          ..
07/15/2022  02:05 AM    <SYMLINKD>     bin [C:\Program Files\containerd\cni\bin]

run restart-service containerd and test --cni will work.

PS C:\> ctr run --cni --rm mcr.microsoft.com/windows/nanoserver:ltsc2022 test ipconfig

Windows IP Configuration


Ethernet adapter vEthernet (default-test_nat):

   Connection-specific DNS Suffix  . :
   Link-local IPv6 Address . . . . . : fe80::1c4a:2067:bd2e:b085%17
   IPv4 Address. . . . . . . . . . . : 172.20.86.46
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . : 172.20.80.1

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