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第 21.8 节 Linux 兼容层——基于 Rocky Linux

# fetch http://book.bsdcn.org/rocky.sh
# sh rocky.sh

脚本内容如下：

#!/bin/sh


ROOT_DIR=/compat
DIST=rocky
DIST_FULLNAME="Rocky Linux"
VER=9
SUB_VER=2
TIME_VER="latest"
SORT=Base
FILE=Rocky-${VER}-Container-${SORT}.${TIME_VER}.x86_64.tar.xz
SUBDIR=""
URL=https://mirrors.ustc.edu.cn/${DIST}/${VER}.${SUB_VER}/images/x86_64
UPDATE_CMD="dnf makecache"
UPGRADE_CMD="dnf upgrade -y"
INSTALL_CMD="dnf install -y"
UPDATE=1
UPGRADE=1
INSTALL=1




echo "Starting to install ${DIST_FULLNAME}"
sleep 0.5




# check.sh
echo "Checking relative modules"


if [ ! "$(sysrc -n linux_enable)" = "YES" ]; then
  echo "linux service is not enabled. Enable it now?(Y|n)"
  read ANSWER
  case ${ANSWER} in
    [Nn][Oo]|[Nn])
      echo "Warning: You MUST start linux service with \"service linux start\" EACH TIME FREEBSD IS REBOOTED."
      echo "Sure to continue without enabling linux service?(y|N)"
      read ANSWER
      case ${ANSWER} in
        [Yy][Ee][Ss]|[Yy])
          echo "WARNING: linux moudle not enabled"
          ;;
        [Nn][Oo]|[Nn]|"")
          echo "Enabling linux moudle"
          sysrc linux_enable=YES
          ;;
        *)
          echo "Aborting."
          exit 4
          ;;
      esac
      ;;
    [Yy][Ee][Ss]|[Yy]|"")
      echo "Enabling linux moudle"
      sysrc linux_enable=YES
      ;;
    *)
      echo "Aborting."
      exit 4
      ;;
  esac
fi


echo "Starting linux service"
service linux start


if ! which -s dbus-daemon; then
  echo "dbus-daemon not found. Install dbus now?(Y|n)"
  read ANSWER
  case ${ANSWER} in
    [Nn][Oo]|[Nn])
      echo "Abort. dbus not installed"
      exit 2
      ;;
    [Yy][Ee][Ss]|[Yy]|"")
      echo "Installing dbus"
      pkg install -y dbus
      ;;
    *)
      echo "Aborting."
      exit 4
      ;;
  esac
fi


if [ ! "$(sysrc -n dbus_enable)" = "YES" ]; then
  echo "dbus is not enabled. Enable it now?(Y|n)"
  read ANSWER
  case ${ANSWER} in
    [Nn][Oo]|[Nn])
      echo "WARNING: You MUST start dbus with \"service dbus start\" EACH TIME FREEBSD IS REBOOTED."
      echo "Sure to continue without enabling dbus?(y|N)"
      read ANSWER
      case ${ANSWER} in
        [Yy][Ee][Ss]|[Yy])
          echo "Warning: dbus service not enabled"
          ;;
        [Nn][Oo]|[Nn]|"")
          echo "Enabling dbus service"
          sysrc dbus_enable="YES"
          ;;
        *)
          echo "Aborting."
          exit 4
          ;;
      esac
      ;;
    [Yy][Ee][Ss]|[Yy]|"")
      echo "Enabling dbus service"
      sysrc dbus_enable="YES"
      ;;
    *)
      echo "Aborting."
      exit 4
      ;;
  esac
fi


if [ -z "$(ps aux | grep -p dbus | grep -v grep)" ]; then
  echo "Starting dbus service"
  service dbus start
fi


if [ ! "$(sysrc -f /boot/loader.conf -qn nullfs_load)" = "YES" ]; then
  echo "nullfs should be loaded when boot. Set nullfs_load to YES?(Y|n)"
  read ANSWER
  case ANSWER in
    [Nn][Oo]|[Nn])
      echo "Warning: You MUST load nullfs with \"kldload -v nullfs\" EACH TIME FREEBSD IS REBOOTED."
      echo "Sure to continue without setting nullfs_load to YES?(y|N)"
      read ANSWER
      case ANSWER in
        [Yy][Ee][Ss]|[Yy])
          echo "Warning: nullfs_load not set"
          ;;
        [Nn][Oo]|[Nn]|"")
          echo "Setting nullfs_load to YES"
          sysrc -f /boot/loader.conf nullfs_load="YES"
          ;;
        *)
          echo "Aborting."
          exit 4
          ;;
      esac
      ;;
    [Yy][Ee][Ss]|[Yy]|"")
      echo "Setting nullfs_load to YES"
      sysrc -f /boot/loader.conf nullfs_load="YES"
      ;;
    *)
      echo "Aborting."
      exit 4
      ;;
  esac
fi


if ! kldstat -n nullfs >/dev/null 2>&1; then
  echo "Loading nullfs module"
  kldload -v nullfs
fi




# pre_extract.sh




echo "${DIST_FULLNAME} will be installed in ${ROOT_DIR}/${DIST}"


echo "Downloading basic system"
fetch ${URL}/${FILE}


echo "Exacting basic system"
sleep 0.5
mkdir -p ${ROOT_DIR}/${DIST}
tar xvpf ${FILE} ${SUBDIR:-} -C ${ROOT_DIR}/${DIST} --numeric-owner


echo "Mounting recuired file system"
sleep 0.5
echo "devfs  ${ROOT_DIR}/${DIST}/dev  devfs  rw,late  0  0" >> /etc/fstab
echo "tmpfs  ${ROOT_DIR}/${DIST}/dev/shm  tmpfs  rw,late,size=1g,mode=1777  0  0" >> /etc/fstab
echo "fdescfs  ${ROOT_DIR}/${DIST}/dev/fd  fdescfs  rw,late,linrdlnk  0  0" >> /etc/fstab
echo "linprocfs  ${ROOT_DIR}/${DIST}/proc  linprocfs  rw,late  0  0" >> /etc/fstab
echo "linsysfs  ${ROOT_DIR}/${DIST}/sys  linsysfs  rw,late  0  0" >> /etc/fstab
echo "/tmp  ${ROOT_DIR}/${DIST}/tmp  nullfs  rw,late  0  0" >> /etc/fstab
#echo "/home  ${ROOT_DIR}/${DIST}/home  nullfs  rw,late  0  0" >> /etc/fstab
mount -al




# setup.sh
echo "Should ${DIST_FULLNAME} use Alibaba DNS or local resolv.conf?( (A)li | (l)ocal | (c)ancel )"
read ANSWER
case ${ANSWER} in
  [Aa][Ll][Ii]|[Aa]|"")
    echo "Setting Alibaba DNS"
    echo "nameserver 223.5.5.5" >> ${ROOT_DIR}/${DIST}/etc/resolv.conf
    DNS_CONFIGURED=1
    ;;
  [Ll][Oo][Cc][Aa][Ll]|[Ll])
    echo "Using local reslov.conf"
    cp /etc/resolv.conf ${ROOT_DIR}/${DIST}/etc/resolv.conf
    DNS_CONFIGURED=1
    ;;
  *)
    echo "Cancled."
    echo "You have to edit ${ROOT_DIR}/${DIST}/etc/resolv.conf by yourself!"
    DNS_CONFIGURED=0
    ;;
esac


echo "Do you want to use ustc source for ${DIST_FULLNAME}?(Y|n)"
read ANSWER
case ${ANSWER} in
  [Yy][Ee][Ss]|[Yy]|"")
    echo "Setting ustc source"
    chroot ${ROOT_DIR}/${DIST} /bin/bash -c "sed \
      -e 's|^mirrorlist=|#mirrorlist=|g' \
      -e 's|^#baseurl=http://dl.rockylinux.org/\$contentdir|baseurl=https://mirrors.ustc.edu.cn/rocky|g' \
      -i.bak \
      /etc/yum.repos.d/rocky-extras.repo \
      /etc/yum.repos.d/rocky.repo"
    ;;
  [Nn][Oo]|[Nn])
    echo "Will not set ustc source. Skipping upgrade and software installation in case of unexpected time consumption."
    UPDATE=0
    UPGRADE=0
    INSTALL=0
    ;;
  *)
    echo "Aborting."
    exit 4
    ;;
esac


if [ ${DNS_CONFIGURED} = 1 ]; then
  if [ ${UPDATE} = 1 ]; then
    echo "Updating ${DIST_FULLNAME}"
    chroot ${ROOT_DIR}/${DIST} /bin/bash -c "${UPDATE_CMD}"
  fi
  if [ ${UPGRADE} = 1 ]; then
    echo "Upgrading ${DIST_FULLNAME}"
    chroot ${ROOT_DIR}/${DIST} /bin/bash -c "${UPGRADE_CMD}"
  fi
else
  echo "DNS is not set, skipping upgrade"
fi


if [ ${DNS_CONFIGURED} = 1 ]; then
  if [ ${INSTALL} = 1 ]; then
    echo "Installing vim"
    chroot ${ROOT_DIR}/${DIST} /bin/bash -c "${INSTALL_CMD} vim"
  fi
else
  echo "DNS is not set, skipping installation"
fi




echo "Cleaning up"
rm ${FILE}


echo "Done."
echo "Now you can switch to ${DIST_FULLNAME} with \"chroot ${ROOT_DIR}/${DIST} /bin/bash\""