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Finish the provisioner and metadata server

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This commit is contained in:
Joshua Boniface
2019-12-12 19:41:23 -05:00
parent 88924497c2
commit 708de48065
6 changed files with 577 additions and 26 deletions
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65
client-provisioner/examples/debootstrap_script.py
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@ -113,31 +113,64 @@ def install(**kwargs):
# Append the fstab line
with open(fstab_file, 'a') as fh:
fh.write("/dev/{disk} {mountpoint} {filesystem} {options} {dump} {cpass}\n".format(
data = "/dev/{disk} {mountpoint} {filesystem} {options} {dump} {cpass}\n".format(
disk=disk['disk_id'],
mountpoint=disk['mountpoint'],
filesystem=disk['filesystem'],
options=options,
dump=dump,
cpass=cpass
))
)
fh.write(data)
# Write the hostname
hostname_file = "{}/etc/hostname".format(temporary_directory)
with open(hostname_file, 'w') as fh:
fh.write("{}".format(vm_name))
# Write a DHCP stanza for ens2
# Fix the cloud-init.target since it's broken
cloudinit_target_file = "{}/etc/systemd/system/cloud-init.target".format(temporary_directory)
with open(cloudinit_target_file, 'w') as fh:
data = """[Install]
WantedBy=multi-user.target
[Unit]
Description=Cloud-init target
After=multi-user.target
"""
fh.write(data)
# NOTE: Due to device ordering within the Libvirt XML configuration, the first Ethernet interface
# will always be on PCI bus ID 2, hence the name "ens2".
# Write a DHCP stanza for ens2
ens2_network_file = "{}/etc/network/interfaces.d/ens2".format(temporary_directory)
with open(ens2_network_file, 'w') as fh:
fh.write("auto ens2\niface ens2 inet dhcp\n")
data = """auto ens2
iface ens2 inet dhcp
"""
fh.write(data)
# Write the DHCP config for ens2
dhclient_file = "{}/etc/dhcp/dhclient.conf".format(temporary_directory)
with open(dhclient_file, 'w') as fh:
data = """# DHCP client configuration
# Created by vminstall for host web1.i.bonilan.net
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
interface "ens2" {
send host-name = "web1";
send fqdn.fqdn = "web1";
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, domain-search, host-name,
dhcp6.name-servers, dhcp6.domain-search, dhcp6.fqdn, dhcp6.sntp-servers,
netbios-name-servers, netbios-scope, interface-mtu,
rfc3442-classless-static-routes, ntp-servers;
}
"""
fh.write(data)
# Write the GRUB configuration
grubcfg_file = "{}/etc/default/grub".format(temporary_directory)
with open(grubcfg_file, 'w') as fh:
fh.write("""# Written by the PVC provisioner
data = """# Written by the PVC provisioner
GRUB_DEFAULT=0
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="PVC Virtual Machine"
@ -146,25 +179,39 @@ GRUB_CMDLINE_LINUX=""
GRUB_TERMINAL=console
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
GRUB_DISABLE_LINUX_UUID=false
""".format(root_disk=root_disk['disk_id']))
""".format(root_disk=root_disk['disk_id'])
fh.write(data)
# Chroot and install GRUB so we can boot, then exit the chroot
# Chroot, do some in-root tasks, then exit the chroot
# EXITING THE CHROOT IS VERY IMPORTANT OR THE FOLLOWING STAGES OF THE PROVISIONER
# WILL FAIL IN UNEXPECTED WAYS! Keep this in mind when using chroot in your scripts.
real_root = os.open("/", os.O_RDONLY)
os.chroot(temporary_directory)
fake_root = os.open("/", os.O_RDONLY)
os.fchdir(fake_root)
# Install and update GRUB
os.system(
"grub-install --force /dev/rbd/{}/{}_{}".format(root_disk['pool'], vm_name, root_disk['disk_id'])
)
os.system(
"update-grub"
)
# Set a really dumb root password [TEMPORARY]
os.system(
"echo root:test123 | chpasswd"
)
# Restore our original root
# Enable cloud-init target on (first) boot
# NOTE: Your user-data should handle this and disable it once done, or things get messy.
# That cloud-init won't run without this hack seems like a bug... but even the official
# Debian cloud images are affected, so who knows.
os.system(
"systemctl enable cloud-init.target"
)
# Restore our original root/exit the chroot
# EXITING THE CHROOT IS VERY IMPORTANT OR THE FOLLOWING STAGES OF THE PROVISIONER
# WILL FAIL IN UNEXPECTED WAYS! Keep this in mind when using chroot in your scripts.
os.fchdir(real_root)
os.chroot(".")
os.fchdir(real_root)
@ -182,4 +229,4 @@ GRUB_DISABLE_LINUX_UUID=false
del fake_root
del real_root
# Everything else is done via cloud-init
# Everything else is done via cloud-init user-data