Centos6にOpenVZインストールしてsshログインするまで
Lpic304の勉強がてら試したのでメモ 第2段
これはCentos7の例。 https://thegeeksalive.com/how-to-setup-openvz-7-on-centos-7/
ただ、Centos7ではライブラリの依存関係が面倒だったので、Centos6で試す https://www.kwonline.org/memo2/2020/03/09/install-openvz-on-centos-6_5/ https://www.unixmen.com/install-and-configure-openvz-on-centos/
OpenVZインストール
wget -P /etc/yum.repos.d/ http://ftp.openvz.org/openvz.repo rpm --import http://ftp.openvz.org/RPM-GPG-Key-OpenVZ yum install vzkernel 追記 [root@mukkun ~]# cat sysctl.conf # On Hardware Node we generally need # packet forwarding enabled and proxy arp disabled net.ipv4.ip_forward = 1 net.ipv6.conf.default.forwarding = 1 net.ipv6.conf.all.forwarding = 1 net.ipv4.conf.default.proxy_arp = 0 # Enables source route verification net.ipv4.conf.all.rp_filter = 1 # Enables the magic-sysrq key kernel.sysrq = 1 # We do not want all our interfaces to send redirects net.ipv4.conf.default.send_redirects = 1 net.ipv4.conf.all.send_redirects = 0 [root@mukkun ~]# cat /etc/sysconfig/selinux | grep disable # disabled - No SELinux policy is loaded. SELINUX=disabled yum install vzctl vzquota ploop grubでOpenVZのカーネルがデフォルトになっていることを確認してからreboot [root@mukkun ~]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/mapper/vg_mukkun-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/md127 default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title OpenVZ (2.6.32-042stab145.3) ★ root (hd0,0) kernel /vmlinuz-2.6.32-042stab145.3 ro root=/dev/mapper/vg_mukkun-lv_root rd_MD_UUID=7f9c0939:7a3803d8:68d9f945:65819100 rd_LVM_LV=vg_mukkun/lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_mukkun/lv_swap rd_MD_UUID=f7305389:dd025f17:6fc81a4e:ba4602f8 SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab145.3.img title CentOS (2.6.32-754.30.2.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-754.30.2.el6.x86_64 ro root=/dev/mapper/vg_mukkun-lv_root rd_MD_UUID=7f9c0939:7a3803d8:68d9f945:65819100 rd_LVM_LV=vg_mukkun/lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_mukkun/lv_swap rd_MD_UUID=f7305389:dd025f17:6fc81a4e:ba4602f8 SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-754.30.2.el6.x86_64.img
コンテナを作成してみる
cd /vz/template/cache/ テンプレートダウンロード wget http://download.openvz.org/template/precreated/centos-7-x86_64-minimal.tar.gz コンテナ作成 vzctl create 101 --ostemplate centos-7-x86_64-minimal
IP・ホスト名の設定
IPの設定
[root@mukkun cache]# vzctl set 100 --ipadd 10.0.20.50 --save CT configuration saved to /etc/vz/conf/100.conf
ホスト名変える
[root@mukkun cache]# vzctl set 100 --hostname con100 --save UB limits were set successfully
起動・コンソールログイン・SSHログイン
起動
[root@mukkun cache]# vzctl start 100 Starting container... Opening delta /vz/private/100/root.hdd/root.hdd Adding delta dev=/dev/ploop32913 img=/vz/private/100/root.hdd/root.hdd (rw) Mounting /dev/ploop32913p1 at /vz/root/100 fstype=ext4 data='balloon_ino=12,' Container is mounted Adding IP address(es): 10.101.20.50 Setting CPU units: 1000 Container start in progress...
入ってみる
[root@mukkun cache]# vzctl enter 100 entered into CT 100 [root@con100 /]# [root@con100 /]# cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) [root@con100 /]# passwd Changing password for user root. New password: Retype new password: passwd: all authentication tokens updated successfully.
コンソールで入る
[root@mukkun cache]# vzctl console 100 Attached to CT 100 (ESC . to detach) Password: Login incorrect con100 login: root Password: Last login: Sun Jul 12 10:59:32 on console [root@con100 ~]#
Esc+.(ドット)で抜ける
sshしてみる
[root@mukkun cache]# ssh root@10.0.20.50 root@10.0.20.50's password: Last login: Sun Jul 12 11:00:02 2020 [root@con100 ~]#
サーバー側からコマンドを実行してみる
[root@mukkun cache]# vzctl exec 100 /sbin/ip -4 a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN inet 127.0.0.1/8 scope host lo 2: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN inet 127.0.0.1/32 scope host venet0 inet 10.101.20.50/32 brd 10.101.20.50 scope global venet0:0