最近は Ubuntu を使う機会が多いのですが、久しぶりに RedHat 系の OS を触りたくなり、OCI 無料インスタンスの Oracle Linux でスワップメモリ追加やディスク拡張を試してみました。
SSH 接続して日本時間に設定
$ ssh [email protected]
$ sudo timedatectl set-timezone Asia/Tokyo
$ dateスワップメモリを増やす
$ free
total used free shared buff/cache available
Mem: 970796 509692 323788 4668 293924 461104
Swap: 970748 0 970748
$ sudo swapoff -a
$ sudo dd if=/dev/zero of=/.swapfile bs=128M count=16 # 2GB
$ sudo mkswap /.swapfile
$ sudo swapon /.swapfile
$ sudo swapon -s
$ free
total used free shared buff/cache available
Mem: 970796 573488 64008 856 493008 397308
Swap: 2097148 0 2097148ディスク拡張（ルートボリューム拡張）
$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0M 0 4.0M 0% /dev
tmpfs 475M 0 475M 0% /dev/shm
tmpfs 190M 4.6M 186M 3% /run
/dev/mapper/ocivolume-root 30G 11G 19G 37% /
/dev/mapper/ocivolume-oled 15G 189M 15G 2% /var/oled
/dev/sda2 2.0G 344M 1.7G 18% /boot
/dev/sda1 100M 6.3M 94M 7% /boot/efi
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 100M 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 44.5G 0 part
├─ocivolume-root 252:0 0 29.5G 0 lvm /
└─ocivolume-oled 252:1 0 15G 0 lvm /var/oled
$ sudo /usr/libexec/oci-growfs
Volume Group: ocivolume
Volume Path: /dev/ocivolume/root
Mountpoint Data
---------------
mountpoint: /
source: /dev/mapper/ocivolume-root
filesystem type: xfs
source size: 29.4G
type: lvm
size: 29.5G
physical devices: ['/dev/sda3']
physical volumes: ['/dev/sda', '/dev/sda']
partition number: ['3']
volume group name: ocivolume
volume group path: /dev/ocivolume/root
Partition dry run expansion "/dev/sda3" succeeded.
CHANGE: partition=3 start=4401152 old: size=93325312 end=97726463 new: size=205314015 end=209715166
Expanding partition /dev/sda3: Confirm? [y/N] y
Partition expand expansion "/dev/sda3" succeeded.
update-partition set to true
FLOCK: try exec open fd 9, on failure exec exits this program
FLOCK: /dev/sda: obtained exclusive lock
resizing 3 on /dev/sda using resize_sfdisk_gpt
209715200 sectors of 512. total size=107374182400 bytes
## sfdisk --unit=S --dump /dev/sda
label: gpt
label-id: 03BB97DA-6F69-460E-A76C-82C8377A90CF
device: /dev/sda
unit: sectors
first-lba: 34
last-lba: 97727250
sector-size: 512
/dev/sda1 : start= 2048, size= 204800, type=C12A7328-F81F-11D2-BA4B-00A0C93EC93B, uuid=3AF7074E-C0BB-400D-8FC7-E9EC738AA53F, name="EFI System Partition"
/dev/sda2 : start= 206848, size= 4194304, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, uuid=14BE7023-6C02-4573-8891-9F639B9D936A
/dev/sda3 : start= 4401152, size= 93325312, type=E6D6D379-F507-44C2-A23C-238F2A3DF928, uuid=E700F071-90A5-40BB-8132-52AF688193B7
padding 33 sectors for gpt secondary header
max_end=209715166 tot=209715200 pt_end=97726463 pt_start=4401152 pt_size=93325312
resize of /dev/sda returned 0.
FLOCK: /dev/sda: releasing exclusive lock
CHANGED: partition=3 start=4401152 old: size=93325312 end=97726463 new: size=205314015 end=209715166
Extending /dev/sda3 succeeded.
Device /dev/sda3 extended successfully.
Logical volume /dev/ocivolume/root extended successfully.
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 100M 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 97.9G 0 part
├─ocivolume-root 252:0 0 82.9G 0 lvm /
└─ocivolume-oled 252:1 0 15G 0 lvm /var/oled
$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0M 0 4.0M 0% /dev
tmpfs 475M 0 475M 0% /dev/shm
tmpfs 190M 4.6M 186M 3% /run
/dev/mapper/ocivolume-root 83G 12G 72G 14% /
/dev/mapper/ocivolume-oled 15G 191M 15G 2% /var/oled
/dev/sda2 2.0G 344M 1.7G 18% /boot
/dev/sda1 100M 6.3M 94M 7% /boot/efiSELinux 無効化
$ sudo setenforce 0
$ sudo getenforce
$ sudo sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/configSSH ポート変更
$ sudo sed -i 's/#Port 22/Port 8080/' /etc/ssh/sshd_config
$ sudo firewall-cmd --permanent --zone=public --add-port=8080/tcp
$ sudo firewall-cmd --reload
$ sudo systemctl restart sshd
$ ss -antl
$ sudo reboot
$ ssh -p 8080 [email protected]