254 lines
7 KiB
Python
254 lines
7 KiB
Python
#!/usr/bin/env python3
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import json
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import subprocess
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import sys
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from typing import Any, List
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from deploykit import DeployGroup, DeployHost
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from invoke import task
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RSYNC_EXCLUDES = [".terraform", ".direnv", ".mypy-cache", ".git"]
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def deploy_nixos(hosts: List[DeployHost]) -> None:
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"""
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Deploy to all hosts in parallel
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"""
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g = DeployGroup(hosts)
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def deploy(h: DeployHost) -> None:
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target = f"{h.user or 'root'}@{h.host}"
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h.run_local(
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f"rsync {' --exclude '.join([''] + RSYNC_EXCLUDES)} -vaF --delete -e ssh . {target}:/etc/nixos"
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)
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h.run("nixos-rebuild switch --option accept-flake-config true")
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g.run_function(deploy)
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def sfdisk_json(host: DeployHost, dev: str) -> List[Any]:
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out = host.run(f"sfdisk --json {dev}", stdout=subprocess.PIPE)
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data = json.loads(out.stdout)
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return data["partitiontable"]["partitions"]
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def _format_disks(host: DeployHost, devices: List[str]) -> None:
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assert (
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len(devices) == 1 or len(devices) == 2
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), "we only support single devices or mirror raids at the moment"
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# format disk with as follow:
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# - partition 1 will be the boot partition, needed for legacy (BIOS) boot
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# - partition 2 is for boot partition
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# - partition 3 takes up the rest of the space and is for the system
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for device in devices:
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host.run(
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f"sgdisk -Z -n 1:2048:4095 -n 2:4096:+2G -N 3 -t 1:ef02 -t 2:8304 -t 3:8304 {device}"
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)
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# create mdadm raid for /boot with ext4
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if len(devices) == 2:
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boot_parts = []
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root_parts = []
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for dev in devices:
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# use partuuids as they are more stable than device names
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partitions = sfdisk_json(host, dev)
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boot_parts.append(partitions[1]["node"])
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root_parts.append(f"/dev/disk/by-partuuid/{partitions[2]['uuid'].lower()}")
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host.run(
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f"mdadm --create --verbose /dev/md127 --raid-devices=2 --level=1 {' '.join(boot_parts)}"
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)
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host.run(
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f"zpool create zroot -O acltype=posixacl -O xattr=sa -O compression=lz4 mirror {' '.join(root_parts)}"
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)
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boot = "/dev/md127"
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else:
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partitions = sfdisk_json(host, devices[0])
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boot = partitions[1]["node"]
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uuid = partitions[2]["uuid"].lower()
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root_part = f"/dev/disk/by-partuuid/{uuid}"
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host.run(
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f"zpool create zroot -O acltype=posixacl -O xattr=sa -O compression=lz4 -O atime=off {root_part}"
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)
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host.run("partprobe")
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host.run(f"mkfs.ext4 -F {boot}")
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# setup zfs dataset
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host.run("zfs create -o mountpoint=none zroot/root")
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host.run("zfs create -o mountpoint=legacy zroot/root/nixos")
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host.run("zfs create -o mountpoint=legacy zroot/root/home")
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## and finally mount
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host.run("mount -t zfs zroot/root/nixos /mnt")
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host.run("mkdir /mnt/home /mnt/boot")
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host.run("mount -t zfs zroot/root/home /mnt/home")
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host.run("mount -t ext4 /dev/md127 /mnt/boot")
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@task
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def update_sops_files(c):
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"""
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Update all sops yaml and json files according to .sops.yaml rules
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"""
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c.run(
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"""
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find . \
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-type f \
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\( -iname '*.enc.json' -o -iname 'secrets.yaml' \) \
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-exec sops updatekeys --yes {} \;
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"""
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)
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@task
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def scan_age_keys(c, host):
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"""
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Scans for the host key via ssh an converts it to age
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"""
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import subprocess
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proc = subprocess.run(
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["ssh-keyscan", host], stdout=subprocess.PIPE, text=True, check=True
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)
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print("###### Age keys ######")
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subprocess.run(
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["nix", "run", "--inputs-from", ".#", "nixpkgs#ssh-to-age"],
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input=proc.stdout,
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check=True,
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text=True,
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)
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@task
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def format_disks(c, hosts="", disks=""):
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"""
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Format disks with zfs, i.e.: inv format-disks --hosts build02 --disks /dev/nvme0n1,/dev/nvme1n1
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"""
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for h in get_hosts(hosts):
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_format_disks(h, disks.split(","))
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@task
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def setup_secret(c, hosts=""):
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"""
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Setup SSH key and print age key for sops-nix
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"""
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for h in get_hosts(hosts):
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h.run(
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"install -m600 -D /etc/ssh/ssh_host_rsa_key /mnt/etc/ssh/ssh_host_rsa_key"
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)
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h.run(
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"install -m600 -D /etc/ssh/ssh_host_ed25519_key /mnt/etc/ssh/ssh_host_ed25519_key"
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)
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print(h.host)
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h.run(
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"nix-shell -p ssh-to-age --run 'cat /etc/ssh/ssh_host_ed25519_key.pub | ssh-to-age'"
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)
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@task
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def nixos_install(c, hosts=""):
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"""
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Run NixOS install
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"""
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for h in get_hosts(hosts):
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h.run(
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"nix-shell -p git --run 'git clone https://github.com/nix-community/infra && cd infra && nix-shell'"
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)
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hostname = h.host.replace(".nix-community.org", "")
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h.run(
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f"cd /root/infra && nixos-install --system $(nix-build -A {hostname}-system)"
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)
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def get_hosts(hosts: str) -> List[DeployHost]:
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if hosts == "":
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return [
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DeployHost(f"build{n + 1:02d}.nix-community.org", user="root")
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for n in range(4)
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]
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return [DeployHost(f"{h}.nix-community.org", user="root") for h in hosts.split(",")]
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@task
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def deploy(c, hosts=""):
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"""
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Deploy to all servers. Use inv deploy --hosts build01 to deploy to a single server
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"""
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deploy_nixos(get_hosts(hosts))
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@task
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def build_local(c, hosts=""):
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"""
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Build all servers. Use inv build-local --hosts build01 to build a single server
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"""
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g = DeployGroup(get_hosts(hosts))
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def build_local(h: DeployHost) -> None:
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h.run_local(
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[
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"nixos-rebuild",
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"build",
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"--option",
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"accept-flake-config",
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"true",
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"--flake",
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f".#{h.host}",
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]
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)
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g.run_function(build_local)
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def wait_for_port(host: str, port: int, shutdown: bool = False) -> None:
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import socket
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import time
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while True:
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try:
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with socket.create_connection((host, port), timeout=1):
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if shutdown:
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time.sleep(1)
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sys.stdout.write(".")
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sys.stdout.flush()
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else:
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break
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except OSError:
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if shutdown:
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break
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else:
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time.sleep(0.01)
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sys.stdout.write(".")
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sys.stdout.flush()
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@task
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def reboot(c, hosts=""):
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"""
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Reboot hosts. example usage: inv reboot --hosts build01,build02
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"""
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for h in get_hosts(hosts):
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h.run("reboot &")
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print(f"Wait for {h.host} to shutdown", end="")
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sys.stdout.flush()
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wait_for_port(h.host, h.port, shutdown=True)
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print("")
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print(f"Wait for {h.host} to start", end="")
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sys.stdout.flush()
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wait_for_port(h.host, h.port)
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print("")
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@task
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def cleanup_gcroots(c, hosts=""):
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g = DeployGroup(get_hosts(hosts))
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g.run("find /nix/var/nix/gcroots/auto -type s -delete")
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g.run("systemctl restart nix-gc")
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