This library contains the MMDS metadata definition used by firebuild built machines and a program to load the VM configuration on the guest from the MMDS.
curl -H 'Accept: application/json' http://169.254.169.254/latest/meta-data | jq '.'Example of the output:
{
"Drives":{
"1":{
"DriveID":"1",
"IsReadOnly":"false",
"IsRootDevice":"true",
"PartUUID":"",
"PathOnHost":"rootfs"
}
},
"Env":{},
"ImageTag":"combust-labs/etcd:3.4.0",
"LocalHostname":"focused-edison",
"Machine":{
"CPU":"1",
"CPUTemplate":"",
"HTEnabled":"false",
"KernelArgs":"console=ttyS0 noapic reboot=k panic=1 pci=off nomodules rw",
"Mem":"128",
"VMLinux":"vmlinux-v5.8"
},
"Network":{
"CniNetworkName":"alpine",
"Interfaces":{
"c6:15:a7:48:76:16":{
"Gateway":"192.168.127.1",
"HostDeviceName":"tap18",
"IfName":"",
"IP":"192.168.127.54",
"IPAddr":"192.168.127.54/24",
"IPMask":"ffffff00",
"IPNet":"ip+net",
"NameServers":""
}
}
},
"Users":{
"alpine":{
"SSHKeys":"ssh-rsa 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\n"
}
},
"VMMID":"pkztxllhbaactacdyhea"
}Build vminit for Linux:
make build-vminitAssuming that the guest VM is started with --mmds flag and MMDS defaults:
sudo vminit
vminit contacts the MMDS service from the gurst and downloads the MMDS data. After download, it does the following actions:
- if
latest/meta-data/Envmap contains any values, if writes the environment file in/etc/profile.d/run-env.sh - if
latest/meta-data/LocalHostnameis not empty, writes the value to/etc/hostnamefile - if rewrites
/etc/hostsfile to the defaults, additionally:- if
latest/meta-data/Network/Interfacescontains interfaces andlatest/meta-data/LocalHostnameis not empty, adds an mapping entry for the interface IP address + hostname such that the VM can resolve its own hostname
- if
- if
latest/meta-data/Userscontains user definitions, writes SSH authorized keys files for each respective user
make releaseThis will create a release on GitHub.
make build-vmlinuxUpload the resulting binary artifact to the release.
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