Alibaba Cloud (Aliyun)

For Aliyun, the tools tries to fetch configuration from http://100.100.100.200/. Currently, it only + configures IPv4 and does nothing about IPv6. It will do the following.

First fetch http://100.100.100.200/2016-01-01/meta-data/ to determine whether the + expected API is present. This determines whether Aliyun environment is detected and whether to proceed + to configure the host using Aliyun meta data.
Fetch http://100.100.100.200/2016-01-01/meta-data/network/interfaces/macs/ to get the list + of available interface. Interfaces are identified by their MAC address.
Then for each interface fetch http://100.100.100.200/2016-01-01/meta-data/network/interfaces/macs/$MAC/vpc-cidr-block + , http://100.100.100.200/2016-01-01/meta-data/network/interfaces/macs/$MAC/private-ipv4s and + http://100.100.100.200/2016-01-01/meta-data/network/interfaces/macs/$MAC/netmask. + Thereby we get a list of private IPv4 addresses, one CIDR subnet block and private IPv4 addresses prefix.
+
Then nm-cloud-setup iterates over all interfaces for which it could fetch IP configuration. + If no ethernet device for the respective MAC address is found, it is skipped. + Also, if the device is currently not activated in NetworkManager or if the currently + activated profile has a user-data org.freedesktop.nm-cloud-setup.skip=yes, + it is skipped.
+
Then, the tool will change the runtime configuration of the device. +
+
- Add static IPv4 addresses for all the configured addresses from private-ipv4s with + prefix length according to netmask. For example, + we might have here 2 IP addresses like "10.0.0.150/24,10.0.0.152/24".
- Choose a route table 30400 + the index of the interface and + add a default route 0.0.0.0/0. The gateway + is the default gateway retrieved from metadata server. For + example, we might get a route "0.0.0.0/0 10.0.0.253 10 table=30400".
- Finally, add a policy routing rule for each address. For example + "priority 30400 from 10.0.0.150/32 table 30400, priority 30400 from 10.0.0.152/32 table 30400".
+
+ With above example, this roughly corresponds for interface eth0 to + nmcli device modify "eth0" ipv4.addresses "10.0.0.150/24,10.0.0.152/24" ipv4.routes "0.0.0.0/0 10.0.0.253 10 table=30400" ipv4.routing-rules "priority 30400 from 10.0.0.150/32 table 30400, priority 30400 from 10.0.0.152/32 table 30400". + Note that this replaces the previous addresses, routes and rules with the new information. + But also note that this only changes the run time configuration of the device. The + connection profile on disk is not affected. +
+

Alibaba Cloud (Aliyun)

See Also