From: Ian Kelling <ian@iankelling.org>
Date: Tue, 16 Feb 2016 02:20:16 +0000 (-0800)
Subject: fix bugs in resize script, support multi disk
X-Git-Url: https://iankelling.org/git/?p=automated-distro-installer;a=commitdiff_plain;h=3c98a1230f8c0177d194038ac9c4db70648af792

fix bugs in resize script, support multi disk
---

diff --git a/fai-revm b/fai-revm
index 5ac7fce..79b54a2 100755
--- a/fai-revm
+++ b/fai-revm
@@ -9,7 +9,7 @@ set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
 
 
-disk_count=1
+disk_count=2
 
 script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))
 
diff --git a/fai/config/class/50-host-classes b/fai/config/class/50-host-classes
index 413ac01..61ed257 100755
--- a/fai/config/class/50-host-classes
+++ b/fai/config/class/50-host-classes
@@ -8,7 +8,7 @@
 # use a list of classes for our demo machine
 case $HOSTNAME in
     demohost)
-        echo "FAIBASE DEBIAN DESKTOP ONE_DISK STABLE" ;;
+        echo "FAIBASE DEBIAN DESKTOP TWO_DISK STABLE" ;;
     x2)
         echo "FAIBASE DEBIAN DESKTOP ONE_DISK" ;;
     tp)
diff --git a/fai/config/hooks/partition.DEFAULT b/fai/config/hooks/partition.DEFAULT
index ee19894..adb7b62 100755
--- a/fai/config/hooks/partition.DEFAULT
+++ b/fai/config/hooks/partition.DEFAULT
@@ -48,7 +48,7 @@ devs=(${letters[@]/#//dev/${d}})
 crypt_devs=(${letters[@]/#//dev/mapper/crypt_dev_${d}})
 first_boot_dev=${devs[0]}$bootn
 
-partition=true
+partition=true # hardcoded for now
 
 # somewhat crude detection of whether to partition
 for dev in ${devs[@]}; do
diff --git a/fresize b/fresize
index 90f1998..7a6688f 100755
--- a/fresize
+++ b/fresize
@@ -55,7 +55,9 @@ Usage: ${0##*/} [-n] +/-SIZE[g] swap|boot
 Assuming Ian Kelling's partition scheme,
 Resize swap or boot, expanding or shrinking the root fs and partition to compensate.
 
--n   Dry run
+-n         Dry run
+-r         Reboot now if it's needed.
+-h|--help  Print help.
 
 SIZE is MiB, or if g is specified, GiB.
 
@@ -67,11 +69,16 @@ EOF
     exit $1
 }
 
+reboot_not=false
 dry_run=false
-case $1 in
-    -n) dry_run=true; shift ;;
-    -h|--help) usage ;;
-esac
+while true; do
+    case $1 in
+        -r) reboot_now=true; shift ;;
+        -n) dry_run=true; shift ;;
+        -h|--help) usage ;;
+        *) break ;;
+    esac
+done
 
 #### begin arg error checking ####
 
@@ -98,7 +105,6 @@ case $2 in swap|boot) : ;; *) echo "$0: error: bad 2nd arg"; usage 1 ;; esac
 boot=true
 [[ $2 == boot ]] || boot=false
 
-#size=${x#[+-]}
 op_size=$1 # operator plus size
 [[ $op_size != *g ]] || op_size=$(( ${op_size%g} / 1024 ))
 size=${op_size#[+-]}
@@ -111,48 +117,56 @@ else
     grow=false
 fi
 
+
 ##### end command line parsing ########
 
 rootn=1
 swapn=2
 bootn=3
 needs_reboot=false
+reboot_script_initialized=false
 
 pmk() {
     part=$1
     start_op=$2
     end_op=$3
-    read start end < <(echo ${ptable[$part]})
-    p mkpart primary "$4" $((start $start_op)) $((end $end_op))
+    p mkpart primary "$4" \
+      $((${ptable[start$part]} $start_op)) $((${ptable[end$part]} $end_op))
 }
 
-
-swapoff -a
-
-while read devid dev; do
+def-e() {
     if $dry_run; then
         e() { echo "+ $@"; }
     else
         e() { echo "+ $@"; "$@"; }
     fi
-    ptable=()
-    while IFS=: read id start end _; do
+}
+
+def-e
+e swapoff -a
+
+while read devid dev; do
+    echo skip=$size
+    def-e
+    declare -A ptable
+    while IFS=: read id start end psize _; do
         [[ $id == [0-9] ]] || continue
-        end=${end%MiB}
-        start=${start%MiB}
-        start=${start%.*} # small enough number that parted uses a decimal
-        ptable[$id]="$start $end"
+        ptable[start$id]=start=${start%%[^0-9]*}
+        ptable[end$id]=${end%%[^0-9]*}
+        ptable[size$id]=${psize%%[^0-9]*}
     done < <(parted -m /dev/$dev unit MiB print)
-    parted /dev/$dev unit MiB print | tee /root/backup_partition
+    parted /dev/$dev unit MiB print | tee /root/backup_partition_table_$dev
     p() { e parted -a optimal -s -- /dev/$dev unit MiB "$@"; }
     e systemctl stop systemd-cryptsetup@crypt_swap_$dev$swapn
-    sleep 1
+    sleep 1 # dunno if this is needed,
+    # but systemd likes to do these kind of things in the background.
+
     # These partition comments seems a little verbose now, but I bet they
     # will be helpfull if I read this in more than a week from now.
     # <> = deleted partition, () = partition
     p rm $swapn # ( root )< swap >( boot )
 
-    root_resize_cmd="e btrfs fi resize $devid:$op_size_rev /"
+    root_resize_cmd="e btrfs fi resize $devid:${op_size_rev}M /"
     if $grow; then $root_resize_cmd; fi
     # if $grow; then
     # < root >< swap >( boot )
@@ -165,15 +179,18 @@ while read devid dev; do
     echo "$out"
 
     pmk $rootn "" $op_size_rev
+
+    if echo "$out" | \
+            grep "but we have been unable to inform the kernel" &>/dev/null; then
+        needs_reboot=true
+    fi
     if ! $grow; then
-        if echo "$out" | \
-                grep "but we have been unable to inform the kernel" &>/dev/null; then
+        if $needs_reboot; then
             e systemctl mask dev-mapper-crypt_swap_$dev$swapn.swap
             e systemctl mask systemd-cryptsetup@crypt_swap_$dev$swapn.service
-            if ! $needs_reboot; then
-                needs_reboot=true
-                echo "$0: reboot and run /root/finish-resize to finish.
-The following commands are what will be executed:"
+            e() { echo "$@" >> /root/finish-resize; }
+            if ! $reboot_script_initialized; then
+                reboot_script_initialized=true
                 rm -rf /root/finish-resize
                 cat >/root/finish-resize <<'EOF'
 #!/bin/bash -x
@@ -182,11 +199,8 @@ trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
 EOF
                 chmod +x /root/finish-resize
             fi
-            e() { echo "$@" | tee -a /root/finish-resize; }
             e systemctl unmask systemd-cryptsetup@crypt_swap_$dev$swapn.service
             e systemctl unmask dev-mapper-crypt_swap_$dev$swapn.swap
-            # todo, disable swap for the next boot. currently have to wait
-            # 1:30 for it to fail.
         fi
         $root_resize_cmd
     fi
@@ -196,9 +210,13 @@ EOF
 
         if ! $grow; then
             # shrink boot, move it to a temp file
-            e btrfs fi resize $boot_devid:$op_size /boot
-            temp_boot=/root/temp_boot_dd
-            e dd bs=1M if=/dev/$dev$bootn of=$temp_boot count=$size
+            e btrfs fi resize $boot_devid:${op_size}M /boot
+            e umount /boot
+            temp_boot=/root/temp_boot_$dev
+            e dd bs=1M if=/dev/$dev$bootn of=$temp_boot \
+              count=$((${ptable[size$bootn]} $op_size))
+        else
+            e umount /boot
         fi
         # if $grow; then
         # ( root ) >< swap >< boot >
@@ -208,33 +226,44 @@ EOF
         # ( root >< ) swap >< boot >
         # ( root >< )( swap >< ) boot >
         # ( root >< )( swap >< )( boot )
-        e umount /boot
         p rm $bootn
         pmk $swapn $op_size_rev $op_size_rev "linux-swap"
         pmk $bootn $op_size_rev ""
 
         if $grow; then
             e dd bs=1M if=/dev/$dev$bootn of=/dev/$dev$bootn skip=$size
-            e btrfs fi resize $boot_devid:$op_size /boot
+            e mount /boot
+            e btrfs fi resize $boot_devid:${op_size}M /boot
         else
             e dd bs=1M if=$temp_boot of=/dev/$dev$bootn
+            e mount /boot
         fi
-        e mount /boot
     else
         # if $grow; then  ( root )( >< swap )( boot )
         # else            ( root >< )( swap )( boot )
         pmk $swapn $op_size_rev "" "linux-swap"
+        e systemctl start systemd-cryptsetup@crypt_swap_$dev$swapn
     fi
 done < <(btrfs fi show / | \
                 sed -nr 's#^\s*devid\s*(\S+)\s.*_([^_ ]+)[0-9]\s*$#\1 \2#p')
 
+
 if $boot; then
-    e rm -rf $temp_boot
-    e rm /root/finish-resize
+    e rm -rf "/root/temp_boot_*"
+    e rm -f /root/finish-resize
 fi
 
 if $needs_reboot; then
-    echo "$0: reminder, reboot then /root/finish-resize"
+    if ! $grow; then
+        echo "$0: Reboot, run /root/finish-resize. It's contents:"
+        cat /root/finish-resize
+    else
+        echo "$0: If you want to resize again later, a reboot is required first."
+    fi
+    if $reboot_now; then
+        echo "$0: rebooting now"
+        reboot now
+        exit
+    fi
 fi
 
-#for dev in ${devs[@]}; do