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management vrf using vrf function of new kernel#2411

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batmancn wants to merge 2 commits intosonic-net:masterfrom
batmancn:management-vrf
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management vrf using vrf function of new kernel#2411
batmancn wants to merge 2 commits intosonic-net:masterfrom
batmancn:management-vrf

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@batmancn batmancn commented Jan 3, 2019 •
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  • What I did

Implement management vrf function follow this spec, phase 1. This PR based on #2348 .

#2405 also define management vrf function, by namespace. This is another way to implement management vrf using vrf function in new kernel 4.5.

  • How I did it

I use DB to set management vrf.
I use 'interfaces-config.sh' to trigger network restart.
For details, refer to 'How to verify it' section.

  • How to verify it
  1. use default DB settings to start SONiC
  2. copy modified files as bellow
scp ./files/image_config/interfaces/interfaces.j2 root@172.18.8.213:/usr/share/sonic/templates/interfaces.j2
  1. use these steps to add management vrf in DB
# cat /root/mgmt-vrf.del.json
{
    "MGMT_INTERFACE": {
        "eth0|172.18.8.213/24": null
    }
}

# config load -y /root/mgmt-vrf.del.json

# cat /root/mgmt-vrf.add.json
{
    "MGMT_INTERFACE": {
        "eth0|172.18.8.213/24": {
            "gwaddr": "172.18.8.1",
            "vrfname": "mgmtvrf"
        }
    }
}

# config load -y /root/mgmt-vrf.add.json
  1. use this command to restart network and set management vrf
bash /usr/bin/interfaces-config.sh
  1. use this command to verify
root@sonic:~# ip route show table 1001
default via 172.18.8.1 dev eth0
broadcast 172.18.8.0 dev eth0 proto kernel scope link src 172.18.8.213
172.18.8.0/24 dev eth0 proto kernel scope link src 172.18.8.213
local 172.18.8.213 dev eth0 proto kernel scope host src 172.18.8.213
broadcast 172.18.8.255 dev eth0 proto kernel scope link src 172.18.8.213
  1. use these steps to del management vrf in DB
# cat /root/mgmt-vrf.del.json
{
    "MGMT_INTERFACE": {
        "eth0|172.18.8.213/24": null
    }
}

# config load -y /root/mgmt-vrf.del.json

# cat /root/mgmt-vrf.old.json
{
    "MGMT_INTERFACE": {
        "eth0|172.18.8.213/24": {
            "gwaddr": "172.18.8.1"
        }
    }
}

# config load -y /root/mgmt-vrf.old.json
  1. use this command to restart network and set management vrf
bash /usr/bin/interfaces-config.sh
  1. use these command to verify
# ip route show table 1001

# ip route show
default via 172.18.8.1 dev eth0 proto zebra
...
172.18.8.0/24 dev eth0 proto kernel scope link src 172.18.8.213
240.127.1.0/24 dev docker0 proto kernel scope link src 240.127.1.1 linkdown
  • Known issue

Services based on old socket will be break down in a short time, like sshd/ntpd/logd...

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@batmancn @lguohan @nikos-github @stcheng