I have 3 virtual machines running Ubuntu server 22.04 on a Ubuntu Desktop host. The three machine make up a Kubernetes cluster 1 master and 2 workers, so its imperative that they be LAN. I set up a NatNetwork called "Roley Net", and everything works splendidly until at some point access to the public internet cuts out (LAN still functions fine). All public pings fail and I'm unable to ssh into my machines from the internet. I have found a sort of ghetto solution, I run a script that checks for connectivity to the webpage hosted on the cluster and if no connection is present it stops and starts the natnetwork with the command below:
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vboxmanage natnetwork stop --netname "Roley Net"
vboxmanage natnetwork start --netname "Roley Net"IMPORTANT NOTE: This problem only occurs on the NAT-NETWORK and doesn't happen with regular NAT, Ive found a few forums related to my issue but wasn't able to extract anything helpful.
https://forums.virtualbox.org/viewtopic.php?t=87891
I would be so helpful if someone could help me figure this out because its crashing my whole network and its quite frankly just annoying
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vm@launchpad:~$ vboxmanage list natnetworks
NetworkName: Roley Net
IP: 10.0.2.1
Network: 10.0.2.0/24
IPv6 Enabled: No
IPv6 Prefix: fd17:625c:f037:2::/64
DHCP Enabled: Yes
Enabled: Yes
Port-forwarding (ipv4)
auth api:tcp:[]:20045:[10.0.2.7]:20045
kube api server:tcp:[]:20077:[10.0.2.7]:20077
landing:tcp:[]:20025:[10.0.2.7]:20025
messager:tcp:[]:20026:[10.0.2.7]:20026
postgres:tcp:[]:5112:[10.0.2.7]:5112
reverse ssh:tcp:[]:2345:[10.0.2.7]:2345
selenium hub:tcp:[]:20044:[10.0.2.7]:20044
ssh master:tcp:[]:3333:[10.0.2.7]:22
ssh worker 1:tcp:[]:3334:[10.0.2.8]:22
ssh worker 2:tcp:[]:3335:[10.0.2.9]:22
loopback mappings (ipv4)
127.0.0.1=2Code: Select all
vm@launchpad:~$ vboxmanage list dhcpservers
NetworkName: Roley Net
Dhcpd IP: 10.0.2.1
LowerIPAddress: 10.0.2.2
UpperIPAddress: 10.0.2.254
NetworkMask: 255.255.255.0
Enabled: Yes
Global Configuration:
minLeaseTime: default
defaultLeaseTime: default
maxLeaseTime: default
Forced options: None
Suppressed opts.: None
1/legacy: 255.255.255.0
3/legacy: 10.0.2.1
6/legacy: 10.0.2.1
15/legacy: this wont let me post but it says cs dot stevens dot edu
Groups: None
Individual Configs: None
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anthony@master-roley:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default _gateway 0.0.0.0 UG 100 0 0 enp0s3
10.0.2.0 0.0.0.0 255.255.255.0 U 100 0 0 enp0s3
_gateway 0.0.0.0 255.255.255.255 UH 100 0 0 enp0s3
10.10.121.128 0.0.0.0 255.255.255.192 U 0 0 0 *
10.10.121.141 0.0.0.0 255.255.255.255 UH 0 0 0 calif722ea763f0
10.10.121.145 0.0.0.0 255.255.255.255 UH 0 0 0 cali8f01a008137
10.10.121.146 0.0.0.0 255.255.255.255 UH 0 0 0 cali9b50561b34b
10.10.121.147 0.0.0.0 255.255.255.255 UH 0 0 0 calib34e6eb0e1f
10.10.121.148 0.0.0.0 255.255.255.255 UH 0 0 0 cali643b3166fce
10.10.121.149 0.0.0.0 255.255.255.255 UH 0 0 0 cali049b538ad1f
10.10.130.128 10.0.2.8 255.255.255.192 UG 0 0 0 enp0s3
10.10.185.0 10.0.2.9 255.255.255.192 UG 0 0 0 enp0s3
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
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anthony@master-roley:~$ ifconfig
cali049b538ad1f: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 370838 bytes 36405282 (36.4 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 380636 bytes 31796141 (31.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
cali643b3166fce: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 38176 bytes 3306921 (3.3 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 37457 bytes 27199942 (27.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
cali8f01a008137: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 32 bytes 2336 (2.3 KB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 5 bytes 446 (446.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
cali9b50561b34b: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 165200 bytes 81028612 (81.0 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 177292 bytes 26944597 (26.9 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
calib34e6eb0e1f: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 371230 bytes 36255068 (36.2 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 380030 bytes 31716236 (31.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
calif722ea763f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet6 fe80::ecee:eeff:feee:eeee prefixlen 64 scopeid 0x20<link>
ether ee:ee:ee:ee:ee:ee txqueuelen 1000 (Ethernet)
RX packets 86236 bytes 26404803 (26.4 MB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 105361 bytes 15138163 (15.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:c3:c2:46:14 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.7 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::a00:27ff:fe24:4613 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:24:46:13 txqueuelen 1000 (Ethernet)
RX packets 1264738 bytes 166115810 (166.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1377423 bytes 313142903 (313.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 14411765 bytes 2889072732 (2.8 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 14411765 bytes 2889072732 (2.8 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vxlan.calico: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet 10.10.121.128 netmask 255.255.255.255 broadcast 0.0.0.0
inet6 fe80::6419:30ff:fec3:8ed1 prefixlen 64 scopeid 0x20<link>
ether 66:19:30:c3:8e:d1 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 32 overruns 0 carrier 0 collisions 0