.gitlab-ci/create-rootfs.sh

   1 #!/bin/bash
   2
   3 set -ex
   4
   5 apt-get -y install --no-install-recommends \
   6     ca-certificates \
   7     initramfs-tools \
   8     libpng16-16 \
   9     strace \
  10     libsensors5 \
  11     libexpat1 \
  12     libdrm2 \
  13     libdrm-nouveau2 \
  14     firmware-qcom-media \
  15     netcat-openbsd \
  16     wget \
  17     xz-utils
  18 passwd root -d
  19 chsh -s /bin/sh
  20
  21 cat > /init <<EOF
  22 #!/bin/sh
  23 export PS1=lava-shell:
  24 exec sh
  25 EOF
  26 chmod +x  /init
  27
  28 mkdir -p /lib/firmware/rtl_nic
  29 wget https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtl_nic/rtl8153a-3.fw -O /lib/firmware/rtl_nic/rtl8153a-3.fw
  30
  31 #######################################################################
  32 # Strip the image to a small minimal system without removing the debian
  33 # toolchain.
  34
  35 # xz compress firmware so it doesn't waste RAM at runtime.  Except db820c's
  36 # GPU firmware, due to using a precompiled kernel without compression support.
  37 find /lib/firmware -type f -print0 | \
  38     grep -vz a530 | \
  39     xargs -0r -P4 -n4 xz -T1 -C crc32
  40 ln -s /lib/firmware/qcom/a530* /lib/firmware/
  41
  42 # Copy timezone file and remove tzdata package
  43 rm -rf /etc/localtime
  44 cp /usr/share/zoneinfo/Etc/UTC /etc/localtime
  45
  46 UNNEEDED_PACKAGES="libfdisk1
  47                    tzdata
  48                    diffutils"
  49
  50 export DEBIAN_FRONTEND=noninteractive
  51
  52 # Removing unused packages
  53 for PACKAGE in ${UNNEEDED_PACKAGES}
  54 do
  55         echo ${PACKAGE}
  56         if ! apt-get remove --purge --yes "${PACKAGE}"
  57         then
  58                 echo "WARNING: ${PACKAGE} isn't installed"
  59         fi
  60 done
  61
  62 apt-get autoremove --yes || true
  63
  64 # Dropping logs
  65 rm -rf /var/log/*
  66
  67 # Dropping documentation, localization, i18n files, etc
  68 rm -rf /usr/share/doc/*
  69 rm -rf /usr/share/locale/*
  70 rm -rf /usr/share/man
  71 rm -rf /usr/share/i18n/*
  72 rm -rf /usr/share/info/*
  73 rm -rf /usr/share/lintian/*
  74 rm -rf /usr/share/common-licenses/*
  75 rm -rf /usr/share/mime/*
  76
  77 # Dropping reportbug scripts
  78 rm -rf /usr/share/bug
  79
  80 # Drop udev hwdb not required on a stripped system
  81 rm -rf /lib/udev/hwdb.bin /lib/udev/hwdb.d/*
  82
  83 # Drop all gconv conversions && binaries
  84 rm -rf usr/bin/iconv
  85 rm -rf usr/sbin/iconvconfig
  86 rm -rf usr/lib/*/gconv/
  87
  88 # Remove libusb database
  89 rm -rf usr/sbin/update-usbids
  90 rm -rf var/lib/usbutils/usb.ids
  91 rm -rf usr/share/misc/usb.ids
  92
  93 #######################################################################
  94 # Crush into a minimal production image to be deployed via some type of image
  95 # updating system.
  96 # IMPORTANT: The Debian system is not longer functional at this point,
  97 # for example, apt and dpkg will stop working
  98
  99 UNNEEDED_PACKAGES="apt libapt-pkg5.0 "\
 100 "ncurses-bin ncurses-base libncursesw5 libncurses5 "\
 101 "perl-base "\
 102 "debconf libdebconfclient0 "\
 103 "e2fsprogs e2fslibs libfdisk1 "\
 104 "insserv "\
 105 "udev "\
 106 "init-system-helpers "\
 107 "bash "\
 108 "cpio "\
 109 "xz-utils "\
 110 "passwd "\
 111 "libsemanage1 libsemanage-common "\
 112 "libsepol1 "\
 113 "gpgv "\
 114 "hostname "\
 115 "adduser "\
 116 "debian-archive-keyring "\
 117
 118 # Removing unneeded packages
 119 for PACKAGE in ${UNNEEDED_PACKAGES}
 120 do
 121         echo "Forcing removal of ${PACKAGE}"
 122         if ! dpkg --purge --force-remove-essential --force-depends "${PACKAGE}"
 123         then
 124                 echo "WARNING: ${PACKAGE} isn't installed"
 125         fi
 126 done
 127
 128 # Show what's left package-wise before dropping dpkg itself
 129 COLUMNS=300 dpkg-query -W --showformat='${Installed-Size;10}\t${Package}\n' | sort -k1,1n
 130
 131 # Drop dpkg
 132 dpkg --purge --force-remove-essential --force-depends  dpkg
 133
 134 # No apt or dpkg, no need for its configuration archives
 135 rm -rf etc/apt
 136 rm -rf etc/dpkg
 137
 138 # Drop directories not part of ostree
 139 # Note that /var needs to exist as ostree bind mounts the deployment /var over
 140 # it
 141 rm -rf var/* opt srv share
 142
 143 # ca-certificates are in /etc drop the source
 144 rm -rf usr/share/ca-certificates
 145
 146 # No bash, no need for completions
 147 rm -rf usr/share/bash-completion
 148
 149 # No zsh, no need for comletions
 150 rm -rf usr/share/zsh/vendor-completions
 151
 152 # drop gcc-6 python helpers
 153 rm -rf usr/share/gcc-6
 154
 155 # Drop sysvinit leftovers
 156 rm -rf etc/init.d
 157 rm -rf etc/rc[0-6S].d
 158
 159 # Drop upstart helpers
 160 rm -rf etc/init
 161
 162 # Various xtables helpers
 163 rm -rf usr/lib/xtables
 164
 165 # Drop all locales
 166 # TODO: only remaining locale is actually "C". Should we really remove it?
 167 rm -rf usr/lib/locale/*
 168
 169 # partition helpers
 170 rm usr/sbin/*fdisk
 171
 172 # local compiler
 173 rm usr/bin/localedef
 174
 175 # Systemd dns resolver
 176 find usr etc -name '*systemd-resolve*' -prune -exec rm -r {} \;
 177
 178 # Systemd network configuration
 179 find usr etc -name '*networkd*' -prune -exec rm -r {} \;
 180
 181 # systemd ntp client
 182 find usr etc -name '*timesyncd*' -prune -exec rm -r {} \;
 183
 184 # systemd hw database manager
 185 find usr etc -name '*systemd-hwdb*' -prune -exec rm -r {} \;
 186
 187 # No need for fuse
 188 find usr etc -name '*fuse*' -prune -exec rm -r {} \;
 189
 190 # lsb init function leftovers
 191 rm -rf usr/lib/lsb
 192
 193 # Only needed when adding libraries
 194 rm usr/sbin/ldconfig*
 195
 196 # Games, unused
 197 rmdir usr/games
 198
 199 # Remove pam module to authenticate against a DB
 200 # plus libdb-5.3.so that is only used by this pam module
 201 rm usr/lib/*/security/pam_userdb.so
 202 rm usr/lib/*/libdb-5.3.so
 203
 204 # remove NSS support for nis, nisplus and hesiod
 205 rm usr/lib/*/libnss_hesiod*
 206 rm usr/lib/*/libnss_nis*