74 lines
1.6 KiB
Text
74 lines
1.6 KiB
Text
x step 4 = database!
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- image contextualisation
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- dnsmasq
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- metadata
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- for getting keys
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- user metadata
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- user authentication
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- otp or ldap or plain file
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- for registering keys
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- for creating VMs
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- automating
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- trigger / postgres / etcd
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- building vm images!
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- generate tap names matching vm??? problem, because inteerfaces are
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limited in length!
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[root@diamond hackcloud]# ip link add b23456789012345 type bridge
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[root@diamond hackcloud]# ip link add b234567890123456 type bridge
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Error: argument "b234567890123456" is wrong: "dev" not a valid ifname
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[root@diamond hackcloud]#
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- VMID is not uuid, but counter; using hexa; using 16**10,
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gives 1099511627776 VMs
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>>> (16**10)/(1000*24*365)
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125515.02600182648
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interface names:
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x = vxlan ?
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b = bridge
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v = vm
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=> 16 types possible
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10+1 used => 4 left
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2 positions for interface id? => 256 interfaces per VM
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mac:
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48 bits = 6 bytes
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1 byte = 2hexa positions
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prefix is 02:00: = 2 bytes
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we have 4 bytes = 8 hexa left!!!!
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embed mac suffix as ID!
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full mac = 12 bytes
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No vmprefix + counter -> because counter size might always be wrong
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(how many interfaces? 16? 256? ... )
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--------------------------------------------------------------------------------
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No stale firewall entries as we regnerate, not keep the list!
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table bridge filter {
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chain prerouting {
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type filter hook prerouting priority 0;
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policy accept;
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ibrname br100 jump netpublic-$version
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}
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chain netpublic-10 {
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...
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}
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}
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can generate new full chain, change only the jump
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--------------------------------------------------------------------------------
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Much later:
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- rate limiting
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