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floffel/create.sh

Created June 16, 2018 16:20
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  1. floffel created this gist Jun 16, 2018.
    184 changes: 184 additions & 0 deletions create.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,184 @@
    #!/usr/bin/bash

    ############################
    # Script zum erstellen von #
    # nspawn Containern #
    # #
    # <[email protected]> #
    ############################

    # basic checks
    if [ $UID -ne 0 ]; then
    echo "run this script as root" >&2
    exit 1
    fi

    if [ -z "$1" ]; then
    echo "Usage: $0 </destination>" >&2
    echo " (destination=machinename)"
    exit 0
    fi

    input="$1"

    # Colors:
    #########
    MRED_ON="\033[1m\033[31m"
    URED_ON="\033[5m\033[31m"
    LRED_ON="\033[0m\033[31m"
    MGREEN_ON="\033[1m\033[32m"
    LGREEN_ON="\033[0m\033[32m"
    MYELLOW_ON="\033[1m\033[33m"
    LYELLOW_ON="\033[0m\033[33m"
    MBLUE_ON="\033[1m\033[34m"
    LBLUE_ON="\033[0m\033[34m"
    MMAGENTA_ON="\033[1m\033[35m"
    UMAGENTA_ON="\033[5m\033[35m"
    LMAGENTA_ON="\033[0m\033[35m"
    MCYAN_ON="\033[1m\033[36m"
    UCYAN_ON="\033[5m\033[36m"
    LCYAN_ON="\033[0m\033[36m"
    BOLD_ON="\033[1m"
    UNDERLINE_ON="\e[4m"
    COL_OFF="\033[m"
    ###########################

    ###############UI-Variables
    UI_TEXTOUT_INSET=0

    # Catch the sigint
    sigint_handler() {
    # TODO: implement better error-handling...!
    echo "No tmp-files where deleted... This is the end...";

    # Finally, reset the Terminal
    echo -e "$COL_OFF"
    exit 1
    }

    trap 'sigint_handler' INT

    # Prints the text to stdout/stderr
    # gets the following arguments
    # - any subargument in any subargument can be omitted
    # $TEXT_OUT $1
    # ! // reverse or fatal the command
    # ERROR // prints the error to STDERR
    # INSET // insets the following code
    # {COLOR} // Color is one of {@COLORS}
    #
    function TEXT_OUT {
    #$1
    #$@
    local reverse="off"
    local error="off"
    if [ "$1" == "!" ]; then
    shift
    reverse="on"
    fi

    if [ "$1" == "ERROR" ]; then
    shift

    if [ "$reverse" == "on" ]; then
    TEXT_OUT "!" "$@" 1>&2
    return
    else
    TEXT_OUT "$@" 1>&2
    return
    fi
    if [ "$reverse" == "on" ]; then
    exit 030
    fi
    fi
    if [ "$1" == "INSET" ]; then
    if [ "$reverse" == "on" ]; then
    ((UI_TEXTOUT_INSET-=1))
    else
    ((UI_TEXTOUT_INSET+=1))
    fi

    shift

    TEXT_OUT "$@"
    return
    fi

    # print the INSETS
    local inset_num=0
    while [ "$inset_num" -lt "$UI_TEXTOUT_INSET" ]; do
    printf " "
    ((inset_num+=1))
    done
    echo "$@"
    }

    # 1. Create the directory for the container
    # 2. Chown to floffel
    # 3. Packstrap container without linux
    function createAndPacstrapContainer {
    #$1
    local dest="$1"
    TEXT_OUT "INSET" "Creating Container $dest: "

    if test -e "$dest"; then
    TEXT_OUT "!" "ERROR" "Destination directory exists: $dest!"
    fi

    mkdir "/home/container/$dest"
    TEXT_OUT "Running pacstrap: "
    pacstrap -i -c -d "$dest/" base --ignore linux
    TEXT_OUT "Running systemd-nspawn to start the container - remember to halt the machine"
    systemd-nspawn -b --network-veth -D "$dest"

    TEXT_OUT "Symlinking to the right direction..."
    ln -s "/home/container/$dest" "/var/lib/machines/$dest"

    TEXT_OUT "!" "INSET" "CREATED CONTAINER in directory: $dest"
    }

    # 1. create the /etc/systemd/nspawn/$dest file
    # 2. insert the nework bridge access granting
    function giveHostNetworkAccess {
    #$1
    dest="$1"
    file="/etc/systemd/nspawn/$dest.nspawn"
    if test -e "$file"; then
    TEXT_OUT "!" "ERROR" "File $file alrdy exists...!"
    else
    touch "$file"
    echo '
    [Network]
    Bridge=natbr0
    [Files]
    Bind=/var/cache/pacman/pkg
    ' > "$file"
    fi
    TEXT_OUT "CREATED: $file"
    }

    function giveGuestNetworkAccess {
    #$1
    dest="$1"

    systemctl start "systemd-nspawn@$input"
    sleep 10;
    machinectl shell "root@$dest" /bin/bash -c "systemctl enable systemd-networkd"
    sleep 5;
    machinectl shell "root@$dest" /bin/bash -c "systemctl enable systemd-resolved"
    sleep 5;
    machinectl shell "root@$dest" /bin/bash -c "systemctl start systemd-networkd"
    sleep 5;
    machinectl shell "root@$dest" /bin/bash -c "systemctl start systemd-resolved"
    sleep 5;
    machinectl shell "root@$dest" /bin/bash -c "rm /etc/resolv.conf"
    sleep 5;
    machinectl shell "root@$dest" /bin/bash -c "ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf"
    }

    giveHostNetworkAccess "$input"
    sleep 5;
    createAndPacstrapContainer "$input"
    sleep 5;
    giveGuestNetworkAccess "$input"