2022-10-04 19:17:52 +00:00
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## Steps
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Getting multus up running:
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```
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kubectl apply -f multus-daemonset-crio.yml
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```
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## Host devices (server123)
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Before adding:
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```
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3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:d8:1b brd ff:ff:ff:ff:ff:ff
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4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:d8:1c brd ff:ff:ff:ff:ff:ff
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5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:d8:1d brd ff:ff:ff:ff:ff:ff
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6: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:d8:1e brd ff:ff:ff:ff:ff:ff
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7: eth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:d8:1f brd ff:ff:ff:ff:ff:ff
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8: eth6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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link/ether 3c:ec:ef:cb:df:0a brd ff:ff:ff:ff:ff:ff
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9: eth7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
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```
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2022-10-05 11:07:42 +00:00
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## Inside the pod
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Starting with
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```
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kubectl apply -f pod-eth1.yaml
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```
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Checking:
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```
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[21:20] bridge:multus% kubectl exec -ti samplepod -- ash
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/ # ip l
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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3: eth0@if18: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
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link/ether d2:85:1f:11:d4:d8 brd ff:ff:ff:ff:ff:ff
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4: net1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
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link/ether 3c:ec:ef:cb:d8:1b brd ff:ff:ff:ff:ff:ff
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/ #
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```
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On the host it has been removed:
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```
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[21:21] server123.place10:/etc/cni/net.d# ip l | grep eth1
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[21:22] server123.place10:/etc/cni/net.d#
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```
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IPAM works correctly as well:
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```
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4: net1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
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link/ether 3c:ec:ef:cb:d8:1b brd ff:ff:ff:ff:ff:ff
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inet 10.1.2.2/24 brd 10.1.2.255 scope global net1
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valid_lft forever preferred_lft forever
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inet6 2a0a:e5c0:10:20::2/64 scope global
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valid_lft forever preferred_lft forever
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inet6 fe80::3eec:efff:fecb:d81b/64 scope link
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valid_lft forever preferred_lft forever
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/ #
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```
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After the pod is destroyed, eth1 is back:
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```
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[21:22] server123.place10:/etc/cni/net.d# ip l | grep eth1
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19: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
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alias eth1
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```
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2022-10-04 19:17:52 +00:00
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## SEE ALSO
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* https://github.com/containernetworking/plugins
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