various fixes and improvements

[automated-distro-installer] / myfai-chboot-local

diff --git a/myfai-chboot-local b/myfai-chboot-local
index 66c496d069afa8dfb4f0b07782364a914c25cb1f..d16f3b14961bb6cc9163f1a428496d7b86ade3cc 100755 (executable)
--- a/myfai-chboot-local
+++ b/myfai-chboot-local
@@ -1,37 +1,105 @@
 #!/bin/bash
 
+# note, this script gets piped to bash, so cant cd to current dir
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
+
+fai_action_arg=I
+fai_reboot_arg=,reboot
 case $1 in
     -h|--help)
         echo "see help from myfai-chboot"
         exit 0
         ;;
+    -S)
+        fai_action_arg=S
+        fai_reboot_arg=
+        shift
+        ;;
 esac
 
 [[ $EUID == 0 ]] || exec sudo "${BASH_SOURCE}" "$@"
 
-e() { echo "$@"; "$@"; }
+e() {
+    echo "$*"
+    if ! "$@"; then
+        echo "$0: error: exit code $? from: $*"
+        exit 1
+    fi
+}
+
+host=$1
+
+# assuming ipv4, or else we might need to deal with multiple addresses
+# in an ipv4 + ipv6 network.
+my_ip=$(ip -4 route get 8.8.8.8 | sed -nr 's,^.*src\s+(\S+).*,\1,p')
+if [[ ! $my_ip || $my_ip =~ [[:space:]] ]]; then
+    echo "$0: error: failed to get \$my_ip, got: $my_ip"
+    exit 1
+fi
+
+if [[ $host == default ]]; then
+    ip='*'
+elif [[ $host == [0-9]*.[0-9]*.[0-9]*.[0-9]* ]]; then
+    ip=$host/32
+else
+    type -t host &>/dev/null || apt-get -y install dnsutils
+    ip=$(host $host | sed -rn 's/^\S+ has address //p;T;q')/32
+    if [[ ! $ip || $ip =~ [[:space:]] ]]; then
+        echo "$0: error: failed to get \$my_ip, got: $my_ip"
+        exit 1
+    fi
 
+fi
+
+if modprobe nfsd &>/dev/null; then
+    std_arg="-u nfs://faiserver/srv/fai/config"
+    # nfsv4 wont do rw with overlayfs yet
+    # https://lists.uni-koeln.de/pipermail/linux-fai/2017-March/011641.html
+    root_arg="$my_ip:/srv/fai/nfsroot:vers=3"
+    # fai-setup without -e sets the ip to the local_ip/local_network, eg 192.168.1.3/24
+    # I restrict it to one ip as simple but imperfect access control.
+    sed -ri --follow-symlinks '\%^/srv/fai/%d' /etc/exports
+    cat >>/etc/exports <<EOF
+/srv/fai/config $ip(async,ro,no_subtree_check)
+/srv/fai/nfsroot $ip(async,ro,no_subtree_check,no_root_squash)
+EOF
+    exportfs -ra
+    systemctl start nfs-server # assumes recent os
+else
+    std_arg="-u http://faiserver:8080/config.tar.gz"
+    root_arg="live:http://faiserver:8080/squash.img"
+    /a/exe/web-conf -i -p 8080 - apache2 faiserver <<EOF
+<Location />
+    Deny from all
+    Allow from $ip
+</Location>
+EOF
+fi
 
 rm -f /srv/tftp/fai/pxelinux.cfg/*
 if [[ ! $1 ]]; then
     exit 0
 fi
 
-std_arg="-u nfs://faiserver/srv/fai/config"
-e fai-chboot -Iv $std_arg default # set it to default to get a val out of it next
-kernel=$(fai-chboot -L '^default$' | awk '{print $3}')
+
 # man page doesn't explain this, but this deletes & thus disables
 # all chboot systems.
-type -t host &>/dev/null || apt-get -y install dnsutils
-gateway_ip=$(route -n | sed -rn 's/^0\.0\.0\.0\s+(\S+).*/\1/p')
-my_ip=$(host faiserver $gateway_ip | sed -rn 's/^\S+ has address //p')
-k_args=$(fai-chboot -L '^default$' | \
-             sed -r "s/^(\S+\s+){3}(.*root=)(.*)/\2$my_ip:\3/")
-rm -f /srv/tftp/fai/pxelinux.cfg/*
-e fai-chboot -k "$k_args" -v -f verbose,sshd,createvt,reboot $std_arg $kernel "$@"
-
+e fai-chboot -${fai_action_arg}v $std_arg default # set it to default to get a val out of it next
+kernel=$(fai-chboot -L '^default$' | awk '{print $3}')
+default_k_args=$(fai-chboot -L '^default$' | \
+                     sed -r "s/^(\S+\s+){3}(.*)/\2/")
+# example of default_k_args
+# initrd=initrd.img-3.16.0-4-amd64 ip=dhcp root=192.168.1.3:/srv/fai/nfsroot aufs FAI_CONFIG_SRC=nfs://faiserver/srv/fai/config FAI_ACTION=install
 
-# todo, remove the nopxe script. adjust fai-check to reboot if it fails on the kexec.
+k_args=()
+for arg in $default_k_args; do
+    case $arg in
+        # default root arg is /srv/fai/nfsroot
+        root=*) k_args+=(root=$root_arg) ;;
+        *) k_args+=($arg) ;;
+    esac
+done
+rm -f /srv/tftp/fai/pxelinux.cfg/*
+e fai-chboot -k "${k_args[*]}" -v -f verbose,sshd,createvt$fai_reboot_arg $std_arg $kernel "$host"