CI: remove macos-12; add macos-15-large

[AkihiroSuda]

The macos-12 CI is currently down on purpose and will be completely removed by Dec 3, 2024. (actions/runner-images#10721)

[AkihiroSuda]

https://github.com/lima-vm/socket_vmnet/actions/runs/11668029741/job/32487531768?pr=63

▶ Run limactl shell vm1 ip -4 -json addr show dev lima0 | jq -r .[0].addr_info[0].local | tee /tmp/vm1_iP
192.168.105.3

▶ Run iperf3 -c "$(cat /tmp/vm1_ip)"
  
iperf3: error - unable to connect to server - server may have stopped running or use a different port, firewall issue, etc.: No route to host

[jandubois]

Thanks, LGTM

[AkihiroSuda]

CI is still failing 😞

[jandubois]

No route to host doesn't sound like a firewall problem, but a routing table issue.

Maybe print out the routing table as part of the action?

Also maybe run on macos-13 instead of macos-15? And if that works, compare routing tables between the runners.

[AkihiroSuda]

https://github.com/lima-vm/socket_vmnet/actions/runs/11670466432/job/32494724116?pr=63

+ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags               Netif Expire
default            192.168.64.1       UGScg                 en0       
default            link#11            UCSIg           bridge100      !
127                127.0.0.1          UCS                   lo0       
127.0.0.1          127.0.0.1          UH                    lo0       
169.254            link#5             UCS                   en0      !
192.168.64         link#5             UCS                   en0      !
192.168.64.1/32    link#5             UCS                   en0      !
192.168.64.1       16:9d:99:c7:98:64  UHLWIir               en0   1144
192.168.64.30/32   link#5             UCS                   en0      !
192.168.105        link#11            UC              bridge100      !
192.168.105.2      link#11            UHLWIi          bridge100      !
192.168.105.3      52.55.55.e7.4b.ea  UHLWIi          bridge100   1186
[...]

++ cat /tmp/vm1_ip
+ ping -c 3 192.168.105.3
PING 192.168.105.3 (192.168.105.3): 56 data bytes
64 bytes from 192.168.105.3: icmp_seq=0 ttl=64 time=1.498 ms
64 bytes from 192.168.105.3: icmp_seq=1 ttl=64 time=1.661 ms
64 bytes from 192.168.105.3: icmp_seq=2 ttl=64 time=3.294 ms

--- 192.168.105.3 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 1.498/2.151/3.294/0.811 ms
++ cat /tmp/vm1_ip
+ iperf3 -c 192.168.105.3
iperf3: error - unable to connect to server - server may have stopped running or use a different port, firewall issue, etc.: No route to host

The routing table seems just same as macos-13.

"No route to host" doesn't seem to occur with ping 🤔

The CI is passing for macos-14-large as well as macos-13-large, so something should have changed in macos-15-large.

[nirs]

I would split the changes to:

• remove macos-12 to ubreak the build
• add macos-14 since it works now
• add macos-15 later, probably need more work