### Create Filesystem and Mount After Reboot

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

After the instance reboots with the new partition table, this creates a new filesystem on the modified partition and mounts it. This step is necessary before cloud-init can resize the root filesystem.

```bash
sudo mkfs.ext3 /dev/sda2 -L HIMOM
sudo mount /dev/sda2 /mnt 
sudo rsync -a /etc /mnt/

```

--------------------------------

### Enable Growroot and Trigger ResizeFS

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

Removes the growroot disable flag and the cloud-init resizefs semaphore to allow growroot to resize the root partition on the next boot and for the filesystem to be resized.

```bash
sudo rm /etc/growroot-disabled
sudo rm /var/lib/cloud/instance/sem/config-resizefs
sudo reboot

```

--------------------------------

### Define and Apply New Partition Table

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

Creates a new partition table definition in a file and then applies it to the disk using sfdisk. This operation can destroy existing filesystems on modified partitions.

```bash
cat > rewrite.txt <<EOF
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=  2883585, Id=83
/dev/sda2 : start= 10000000, size=  9441649, Id=83
/dev/sda3 : start= 19441649, size=  1587215, Id=82
/dev/sda4 : start=        0, size=        0, Id= 0
EOF

```

```bash
sudo sfdisk --force -uS ${CHS} /dev/sda < rewrite.txt

```

--------------------------------

### Show Original Partition Table

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

Displays the current partition table configuration for a given disk. This is useful for understanding the initial state before making changes.

```bash
sudo sfdisk -G /dev/sda

```

```bash
CHS=$(sudo sfdisk -G /dev/sda | awk '{print "-C",$2,"-H",$4,"-S",$6}')
sudo sfdisk -uS ${CHS} /dev/sda -d

```

```bash
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=  2883585, Id=83
/dev/sda2 : start=  2883648, size= 16558001, Id=83
/dev/sda3 : start= 19441649, size=  1587215, Id=82
/dev/sda4 : start=        0, size=        0, Id= 0

```

```bash
df -h /dev/sda1 /dev/sda2

```

```bash
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             1.4G  581M  735M  45% /
/dev/sda2             7.8G   52K  7.4G   1% /mnt

```

--------------------------------

### Verify Growroot and Partition Resize

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

After the final reboot, this verifies that the root partition has been grown and the partition table is updated as expected. It also checks the console output for GROWROOT messages.

```bash
euca-get-console-output i-46EE07DB > console.out
sudo grep GROW console.out

```

```bash
GROWROOT: CHANGED: partition=1 start=63 old: size=2883585 end=2883648 new: size=9999937,end=10000000

```

```bash
sudo sfdisk -uS ${CHS} /dev/sda -d

```

```bash
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=  9999937, Id=83
/dev/sda2 : start= 10000000, size=  9441649, Id=83
/dev/sda3 : start= 19441649, size=  1587215, Id=82
/dev/sda4 : start=        0, size=        0, Id= 0

```

```bash
df -h /dev/sda1 /dev/sda2

```

```bash
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             4.7G  582M  3.9G  13% /
/dev/sda2             4.5G  143M  4.1G   4% /mnt

```

--------------------------------

### Prepare for Growroot and Reboot

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

Disables the growroot functionality for the current boot and reboots the instance. This ensures the kernel reads the new partition table without growroot attempting to resize partitions immediately.

```bash
sudo touch /etc/growroot-disabled
sudo reboot

```

--------------------------------

### Dry Run Partition Growth

Source: https://github.com/cloud-team/cloud-initramfs-tools/blob/debian/unstable/growroot/doc/example.txt

Simulates the growth of a partition without making actual changes to the disk. This is useful for verifying the intended outcome of a partition resize operation.

```bash
sudo growpart --dry-run /dev/sda 1

```

```bash
CHANGE: partition=1 start=63 old: size=2883585 end=2883648 new: size=9999937,end=10000000

```

```bash
# === old sfdisk -d ===
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=  2883585, Id=83
/dev/sda2 : start= 10000000, size=  9441649, Id=83
/dev/sda3 : start= 19441649, size=  1587215, Id=82
/dev/sda4 : start=        0, size=        0, Id= 0

```

```bash
# === new sfdisk -d ===
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start=       63, size=  9999937, Id=83
/dev/sda2 : start= 10000000, size=  9441649, Id=83
/dev/sda3 : start= 19441649, size=  1587215, Id=82
/dev/sda4 : start=        0, size=        0, Id= 0

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.