On Sunday, I did a Yum Update on my Amazon Linux 2 instance (a T2.Medium) and after the update only 2 IP addresses per interface were working. Before the update I had 6 IPs per interface. It looks like either the kernel update or the ec2-net-utils is the culprit.
I have tried ec2ifscan and several reboots, as well as dropping the IP and re-attaching it on the AWS control panel.
I can't see the IPs at all from within the instance, and I can't see anything out of place on the AWS side.
Here is list of what was updated.
Any suggestions for what happened and how to fix this would be greatly appreciated.
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Package Arch Version Repository Size
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Installing:
ec2-net-utils noarch 1.5-2.amzn2 amzn2-core 17 k
replacing ec2-net-utils.noarch 1.4-43.amzn2
kernel x86_64 4.14.231-173.360.amzn2 amzn2-core 21 M
Updating:
ec2-instance-connect noarch 1.1-14.amzn2 amzn2-core 23 k
glibc x86_64 2.26-44.amzn2 amzn2-core 3.3 M
glibc-all-langpacks x86_64 2.26-44.amzn2 amzn2-core 7.0 M
glibc-common x86_64 2.26-44.amzn2 amzn2-core 770 k
glibc-devel x86_64 2.26-44.amzn2 amzn2-core 991 k
glibc-headers x86_64 2.26-44.amzn2 amzn2-core 511 k
glibc-locale-source x86_64 2.26-44.amzn2 amzn2-core 3.2 M
glibc-minimal-langpack x86_64 2.26-44.amzn2 amzn2-core 29 k
irqbalance x86_64 2:1.7.0-4.amzn2.0.1 amzn2-core 51 k
java-11-amazon-corretto-headless x86_64 1:11.0.11+9-1.amzn2 amzn2-core 164 M
kernel-headers x86_64 4.14.231-173.360.amzn2 amzn2-core 1.1 M
kernel-tools x86_64 4.14.231-173.360.amzn2 amzn2-core 142 k
libcrypt x86_64 2.26-44.amzn2 amzn2-core 49 k
nettle x86_64 2.7.1-9.amzn2 amzn2-core 327 k
openssh x86_64 7.4p1-21.amzn2.0.3 amzn2-core 507 k
openssh-clients x86_64 7.4p1-21.amzn2.0.3 amzn2-core 650 k
openssh-server x86_64 7.4p1-21.amzn2.0.3 amzn2-core 456 k
Removing:
kernel x86_64 4.14.219-161.340.amzn2 @amzn2-core 101 M
Transaction Summary
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Install 2 Packages
Upgrade 17 Packages
Remove 1 Package
