mirror of
https://git.selfprivacy.org/SelfPrivacy/selfprivacy-nixos-infect.git
synced 2024-11-25 13:01:28 +00:00
363 lines
9.9 KiB
Bash
Executable file
363 lines
9.9 KiB
Bash
Executable file
#! /usr/bin/env bash
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# More info at:
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# - https://github.com/elitak/nixos-infect
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# - https://git.selfprivacy.org/SelfPrivacy/selfprivacy-nixos-infect
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: "${API_TOKEN:?API_TOKEN variable is not set}"
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: "${DOMAIN:?DOMAIN variable is not set}"
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: "${LUSER:?LUSER variable is not set}"
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: "${HOSTNAME:?HOSTNAME variable is not set}"
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: "${PROVIDER:?PROVIDER variable is not set}"
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: "${DNS_PROVIDER_TYPE:?DNS_PROVIDER_TYPE variable is not set}"
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: "${STAGING_ACME:?STAGING_ACME variable is not set}"
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: "${CF_TOKEN:?CF_TOKEN variable is not set}"
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: "${DB_PASSWORD:?DB_PASSWORD variable is not set}"
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: "${ENCODED_PASSWORD:?ENCODED_PASSWORD variable is not set}"
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: "${NIX_VERSION:?NIX_VERSION variable is not set}"
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: "${NIXOS_CONFIG_NAME:?NIXOS_CONFIG_NAME variable is not set}"
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: "${CONFIG_URL:?CONFIG_URL variable is not set}"
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readonly LOCAL_FLAKE_DIR="/etc/nixos"
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readonly SECRETS_FILEPATH="/etc/selfprivacy/secrets.json"
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# Merge original userdata.json with deployment specific fields and print result.
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genUserdata() {
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local password HASHED_PASSWORD userdata_infect
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password=$(printf "%s" "$ENCODED_PASSWORD" | base64 --decode)
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HASHED_PASSWORD=$(mkpasswd -m sha-512 "$password")
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userdata_infect=$(cat << EOF
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{
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"dns": {
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"provider": "$DNS_PROVIDER_TYPE",
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"useStagingACME": "$STAGING_ACME"
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},
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"server": {
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"provider": "$PROVIDER"
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},
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"domain": "DOMAIN",
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"hashedMasterPassword": "$HASHED_PASSWORD",
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"hostname": "HOSTNAME",
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"username": "$LUSER"
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}
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EOF
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)
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jq -s '.[0] * .[1]' \
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"${1:?no userdata.json given to merge with}" <(printf "%s" "$userdata_infect")
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}
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genSecrets() {
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local ESCAPED_PASSWORD
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ESCAPED_PASSWORD=$(printf "%s" "$ENCODED_PASSWORD" | base64 --decode | jq -Rs .)
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cat << EOF
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{
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"api": {
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"token": "$API_TOKEN",
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"skippedMigrations": ["migrate_to_selfprivacy_channel", "mount_volume"]
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},
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"databasePassword": "$DB_PASSWORD",
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"dns": {
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"apiKey": "$CF_TOKEN"
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},
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"modules": {
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"nextcloud": {
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"adminPassword": $ESCAPED_PASSWORD,
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"databasePassword": $ESCAPED_PASSWORD,
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}
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},
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"resticPassword": $ESCAPED_PASSWORD
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}
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EOF
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}
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genHardwareConfiguration() {
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local bootcfg
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if ((isEFI)); then
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bootcfg=$(cat << EOF
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boot.loader.grub = {
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efiSupport = true;
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efiInstallAsRemovable = true;
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device = "nodev";
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};
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fileSystems."/boot" = { device = "$ESP"; fsType = "vfat"; };
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EOF
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)
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else
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bootcfg=$(cat << EOF
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boot.loader.grub.device = "$GRUBDEV";
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EOF
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)
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fi
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cat << EOF
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{ modulesPath, ... }:
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{
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imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
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$bootcfg
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boot.initrd.kernelModules = [ "nvme" ];
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fileSystems."/" = { device = "$ROOTFSDEV"; fsType = "$ROOTFSTYPE"; };
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}
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EOF
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}
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setupConf() {
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mkdir -p ${LOCAL_FLAKE_DIR}
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if ! curl "${CONFIG_URL}" | tar -xz -C ${LOCAL_FLAKE_DIR} --strip-components=1
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then
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echo "Error downloading/extracting top level flake configuration!"
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exit 1
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fi
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# generate and write hardware-configuration.nix
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genHardwareConfiguration > ${LOCAL_FLAKE_DIR}/hardware-configuration.nix
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# generate infected userdata based on original
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local userdataInfected
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userdataInfected="$(genUserdata ${LOCAL_FLAKE_DIR}/userdata.json)"
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printf "%s" "$userdataInfected" > ${LOCAL_FLAKE_DIR}/userdata.json
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# generate and write secrets
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local secrets
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secrets="$(genSecrets)"
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install -m0600 <(printf "%s" "$secrets") -DT ${SECRETS_FILEPATH}
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}
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makeSwap() {
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# TODO check currently available swapspace first
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swapFile=$(mktemp /tmp/nixos-infect.XXXXX.swp)
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dd if=/dev/zero "of=$swapFile" bs=1M count=$((1*1024))
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chmod 0600 "$swapFile"
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mkswap "$swapFile"
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swapon -v "$swapFile"
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}
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removeSwap() {
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swapoff -a
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rm -vf /tmp/nixos-infect.*.swp
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}
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findESP() {
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local esp
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for d in /boot/EFI /boot/efi /boot; do
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[[ ! -d "$d" ]] && continue
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[[ "$d" == "$(df "$d" --output=target | sed 1d)" ]] \
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&& esp="$(df "$d" --output=source | sed 1d)" \
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&& break
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done
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[[ -z "$esp" ]] && { echo "ERROR: No ESP mount point found"; return 1; }
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for uuid in /dev/disk/by-uuid/*; do
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[[ $(readlink -f "$uuid") == "$esp" ]] && echo "$uuid" && return 0
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done
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}
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prepareEnv() {
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isEFI=0
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[ -d /sys/firmware/efi ] || isEFI=1
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if ((isEFI)); then
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ESP="$(findESP)"
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else
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for GRUBDEV in /dev/vda /dev/sda /dev/nvme0n1; do
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[[ -e $GRUBDEV ]] && break;
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done
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fi
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# Retrieve root fs block device
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# (get root mount) (get partition or logical volume)
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ROOTFSDEV=$(mount | grep "on / type" | awk '{print $1;}')
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ROOTFSTYPE=$(df "$ROOTFSDEV" --output=fstype | sed 1d)
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# DigitalOcean doesn't seem to set USER while running user data
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export USER="root"
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export HOME="/root"
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# Nix installer tries to use sudo regardless of whether we're already uid 0
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#which sudo || { sudo() { eval "$@"; }; export -f sudo; }
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# shellcheck disable=SC2174
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mkdir -p -m 0755 /nix
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}
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fakeCurlUsingWget() {
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# Use adapted wget if curl is missing
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which wget && { \
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curl() {
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eval "wget $(
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(local isStdout=1
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for arg in "$@"; do
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case "$arg" in
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"-o")
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echo "-O";
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isStdout=0
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;;
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"-O")
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isStdout=0
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;;
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"-L")
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;;
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*)
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echo "$arg"
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;;
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esac
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done;
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[[ $isStdout -eq 1 ]] && echo "-O-"
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)| tr '\n' ' '
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)"
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}; export -f curl; }
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}
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req() {
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type "$1" > /dev/null 2>&1 || which "$1" > /dev/null 2>&1
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}
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checkEnv() {
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[[ "$(whoami)" == "root" ]] || { echo "ERROR: Must run as root"; return 1; }
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# Perform some easy fixups before checking
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# TODO prevent multiple calls to apt-get update
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(which dnf && dnf install -y perl-Digest-SHA) || true # Fedora 24
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which xzcat || (which yum && yum install -y xz-utils) \
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|| (which apt-get && apt-get update && apt-get install -y xz-utils) \
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|| true
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which curl || fakeCurlUsingWget \
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|| (which apt-get && apt-get update && apt-get install -y curl) \
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|| true
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req curl || req wget || { echo "ERROR: Missing both curl and wget"; return 1; }
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req xzcat || { echo "ERROR: Missing xzcat"; return 1; }
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req awk || { echo "ERROR: Missing awk"; return 1; }
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req cut || req df || { echo "ERROR: Missing coreutils (cut, df)"; return 1; }
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}
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# Download and execute the nix installer script.
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installNix() {
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local nixReleaseBase='https://releases.nixos.org'
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local installURL="${nixReleaseBase}/nix/nix-${NIX_VERSION}/install"
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local shaURL="${installURL}.sha256"
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local sha tmpNixInstall
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# temporary destination for install script
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tmpNixInstall="$(mktemp -t nix-install-XXXXXXXXXX)"
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if [[ ! -f "${tmpNixInstall}" ]]; then
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echo "Failed creating a temporary file for Nix install script!"
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return 1
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fi
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echo "Downloading install script from ${installURL}..."
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if ! curl "${installURL}" -o "${tmpNixInstall}" &>/dev/null; then
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echo "Failure while downloading Nix install script!"
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return 1
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fi
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if ! sha="$(curl "${shaURL}")"; then
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echo "Failure while downloading Nix install script sha!"
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return 1
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fi
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echo "Validating Nix install script checksum..."
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if ! echo "${sha} ${tmpNixInstall}" | sha256sum -c; then
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echo "Checksum validation failed!"
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return 1
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fi
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echo "Running nix installer..."
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if $SHELL "${tmpNixInstall}" --daemon; then
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echo "Nix is installed"
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rm "${tmpNixInstall}"
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else
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echo "Nix installation script failed!"
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return 1
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fi
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}
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infect() {
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# Add nix build users
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# FIXME run only if necessary, rather than defaulting true
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# groupadd nixbld -g 30000 || true
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# for i in {1..10}; do
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# useradd -c "Nix build user $i" -d /var/empty -g nixbld -G nixbld -M -N -r -s "$(which nologin)" "nixbld$i" || true
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# done
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# TODO use addgroup and adduser as fallbacks
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#addgroup nixbld -g 30000 || true
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#for i in {1..10}; do adduser -DH -G nixbld nixbld$i || true; done
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# install Nix in the current system
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# (this should create system nixbld users too)
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# curl -L "https://releases.nixos.org/nix/nix-$NIX_VERSION/install" | $SHELL
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if ! installNix; then
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echo "Nix installation failed!"
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exit 1
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fi
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# shellcheck disable=SC1090
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# is it needed?
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# source ~/.nix-profile/etc/profile.d/nix.sh
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echo "nix build the configuration flake..."
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if ! /root/.nix-profile/bin/nix build \
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--extra-experimental-features "nix-command flakes" \
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--profile /nix/var/nix/profiles/system \
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${LOCAL_FLAKE_DIR}/#nixosConfigurations.sp-nixos.config.system.build.toplevel
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then
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echo "Failed!"
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exit 1
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fi
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echo "activate the built configuration..."
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if ! /nix/var/nix/profiles/system/activate; then
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echo "Failed!"; exit 1
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fi
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echo "make configuration switch..."
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if /nix/var/nix/profiles/system/bin/switch-to-configuration switch; then
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echo "Failed!"; exit 1
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fi
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# Remove nix installed by the "install" script.
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rm -fv /nix/var/nix/profiles/default*
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/nix/var/nix/profiles/system/sw/bin/nix-collect-garbage
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# Reify resolv.conf (???)
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[[ -L /etc/resolv.conf ]] && mv -v /etc/resolv.conf /etc/resolv.conf.lnk && cat /etc/resolv.conf.lnk > /etc/resolv.conf
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# Stage the Nix coup d'état
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touch /etc/NIXOS
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echo etc/nixos > /etc/NIXOS_LUSTRATE
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echo etc/resolv.conf >> /etc/NIXOS_LUSTRATE
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echo root/.nix-defexpr/channels >> /etc/NIXOS_LUSTRATE
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rm -rf /boot.bak
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((isEFI)) && umount "$ESP"
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mv -v /boot /boot.bak
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if ((isEFI)); then
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mkdir /boot
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mount "$ESP" /boot
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find /boot -depth ! -path /boot -exec rm -rf {} +
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fi
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echo "make configuration boot by default..."
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if /nix/var/nix/profiles/system/bin/switch-to-configuration boot; then
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echo "Failed!"; exit 1
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fi
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}
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set -o pipefail
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set -o nounset
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set -o xtrace
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set -o errexit
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apt update
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apt install -y git tar wget curl jq
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checkEnv
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prepareEnv
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makeSwap # smallest (512MB) droplet needs extra memory!
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setupConf
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infect
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removeSwap
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if [[ -z "$NO_REBOOT" ]]; then
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reboot
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fi
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