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发表于 2019-11-19 14:27:55
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4.KVM的相关命令
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4.1退出虚拟机
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ctrl + ]
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3 ^1 ~+ R, W' c; u) v) L$ Q: Z4.2进入虚拟机
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virsh console centos74
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4.3查看虚拟机的及状态. u4 [" V0 c7 Q; _7 P
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virsh list' x5 v; m% o+ M; {
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virsh list --all7 k% o9 B" F6 `* L& a# A/ Q
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4.4启动虚拟机% g3 z3 w3 {% P$ s5 M% T; r& O3 P
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virsh start centos74
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virsh shutdown centos740 P, S* {- w) t/ O4 e& M6 k; [4 o
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4.6强制关闭虚拟机
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virsh destroy centos74( R; Y5 E" Z1 L# }* A
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_5 ~2 O, t, o" I4.7删除虚拟机
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virsh shutdown centos74
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virsh undefine centos74% X2 m6 ]( J' f. y3 ?- V8 D
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5.磁盘管理2 ~ W6 X1 n4 m8 N& }# I
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" K& W6 `3 k! ^: |3 f7 ]5.1查看当前虚拟机硬盘信息4 t t* u# {8 g$ E, }0 `9 m
) X6 V P6 R$ |9 W& U8 ?& Z[root@KVM ~]# qemu-img info /var/linux/images/centos74.img 5 T0 C0 _, P" ]
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image: /var/linux/images/centos74.img
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( \5 ~1 C& p& S9 xfile format: qcow2
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+ k, d/ Q. p6 _( j- ^virtual size: 20G (21474836480 bytes)
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disk size: 1.2G1 Y- N& a1 ^& c; `& p9 e% K' x
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cluster_size: 65536, C3 m5 G4 J. U) v
2 Z! H2 O0 H. hFormat specific information:
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lazy refcounts: false. c1 q8 G) k. T: n5 S
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refcount bits: 16" ]0 C2 j4 i1 y6 F9 Q' Z# V% Q
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corrupt: false1 B; r2 J0 P3 D0 b+ q
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5.2转换磁盘格式（qcow2转换为raw）
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[root@KVM ~]# qemu-img convert -f qcow2 -O raw /var/linux/images/centos74.img /var/linux/images/centos74.img # F0 K! w2 ]$ C( d- Q% ~! D. i1 q% |
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: q# z M8 h. j; i& g1 L5.3KVM虚拟机添加硬盘0 j% X: E- s! M" R8 L0 x; O
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5.3.1创建一块新的硬盘
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; F% m* S- w* Z[root@KVM ~]# qemu-img create -f qcow2 /var/linux/images/centos74-add.qcow2 2G1 g n+ D) q3 o8 m& [2 k$ a0 Q( ]7 Y/ u
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5.3.2查看创建的硬盘信息" u+ m4 Y3 \: Y9 N, i5 m
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[root@KVM ~]# qemu-img info /var/linux/images/centos74-add.qcow2 - ?0 p5 {$ ?3 F9 W6 M: k
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image: /var/linux/images/centos74-add.qcow2$ g1 l& u" M I4 b4 M8 q
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file format: qcow28 B7 y1 O1 M5 U* ^9 q- |
; V8 ~* s7 Y& N) w/ t$ k3 i: Rvirtual size: 2.0G (2147483648 bytes)/ k: i9 k1 @, P& O9 C! h6 D
% D5 ?* ]( Z; J' V1 j. h/ mdisk size: 196K
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cluster_size: 655360 b6 u3 w3 d; E0 ?4 y* l
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Format specific information:$ M8 e' R. V! q. |
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compat: 1.1" n/ o( Y2 Z e- P
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lazy refcounts: false
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8 a- Z( D5 B4 B0 F* ~ refcount bits: 16, n* s/ P* ]& N
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5.3.3为虚拟机添加硬盘2 P2 p% L: I& B; K x
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[root@KVM ~]# virsh attach-disk centos74 /var/linux/images/centos74-add.qcow2 vdb --live --cache=none --subdriver=qcow2
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Disk attached successfully5 M! _2 U/ X9 g
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" M1 g) o# e" j: g& O说明：vdb 第二块硬盘0 ~# `) M" k3 p @
/ f9 H, k% e" n$ a' k& p/ N --live 热添加" s! Y B: ^, V2 D% S% u( R2 Y
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--sudbriver 驱动类型# Y3 F% a. K% @7 B: `
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detach-disk 分离磁盘设备
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1 {+ t8 [$ {7 D5 I attach-disk 附加磁盘设备# h: l5 S& c* V2 N
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5.4格式化磁盘(在KVM虚拟机中操作)
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[root@centos74 ~]# mkfs.xfs /dev/vdb" D/ ]( N# f; P1 R3 V$ e
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6.快照管理
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6.1创建快照
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[root@KVM ~]# virsh snapshot-create cnetos74. E; n; U2 A" P) u6 G
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* i- g. e G9 M u1 R6 y6.2查看主机快照列表4 M o) M3 Y; i6 V9 `
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[root@KVM ~]# virsh snapshot-list centos749 }' a% P- D ]& a H6 i8 @
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1 J: X: w4 q8 H1 C- Y6.3查看快照信息
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[root@KVM ~]# virsh snapshot-info centos74 --spanshotname 1516607756* B8 H" d7 M) l" b0 U, n
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& B: Y* c) l+ L A% ]6.4还原快照
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3 |- S# z$ X! w- r8 @+ K[root@KVM ~]# virsh snapshot-revert centos74 --spanshotname 1516607756
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6.5删除快照
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[root@KVM ~]# virsh snapshot-delete centos74 --spanshotname 15166077560 P0 d: M$ @% G; z2 e+ `, X
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7.KVM虚拟机克隆8 O( B0 r7 m% i
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[root@KVM ~]# virsh-clone --auto-clone -o centos74$ d; f7 s1 x' i% R
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8.KVM虚拟机冷迁移# U# P# p1 u: W5 U& i3 X; v
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8.1在KVM02中安装kvm组件' ]7 M3 q; N, A* F {/ }
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[root@KVM02 ~]# yum install -y libvirt* virt-* qemu-kvm*
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5 ?1 o8 h: }# C- Z5 n8.2配置桥接网络
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[root@KVM 02~]# virsh iface-bridge eth0 br0
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8.3KVM主机将虚拟机关闭，导出配置文件
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8 z' u5 e& E& {2 l# w! V2 r# s[root@KVM ~]# virsh shutdown centos74; D6 n! ?* V3 D4 G6 t
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" f7 n8 ?$ F' d2 Q Y8.4将虚拟文件传输到KVM02上. y j, r! y6 F5 @
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[root@KVM ~]# scp -rp centos74.xml 10.0.0.102:/data
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8.5KVM02主机导入文件
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& ]0 c u7 _0 l( g1 T[root@KVM02 ~]# virsh define centos74.xml
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4 A9 b8 K7 j$ O9 ?# i" j7 R8.6启动虚拟机
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[root@KVM02 ~]# virsh start centos741 [: ]' j! \2 B& z/ `( N: @
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9.1KVM虚拟机热迁移的核心
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/ K9 k A/ I* W 共享存储。这里使用NFS共享存储（详情参考：https://blog.51cto.com/13520761/2087720）
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: {( G5 J2 X. L: |. I; D2 b m' \9.1安装virt-manager所需桌面及vnc-server. ]: X& W5 Z2 q1 V( d0 y
# K" Z% Y2 s2 J# U* K$ i[root@KVM ~]# yum groupinstall "GNOME Desktop" -y
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[root@KVM ~]# yum install -y tigervnc-server 8 z4 Z* k, }8 G- k! |6 K
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[root@KVM ~]# yum install -y opnssh-askpass( ?& C: [* J. `" Y6 r
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9.2复制vnc配置文件
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[root@KVM ~]# cp /usr/lib/systemd/system/vncserver@.server /usr/lib/systemd/system/vncserver@\:1.server0 O( W# U5 N7 g
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9.3修改配置文件$ l6 x3 P, x( v3 U" E. H8 F, q
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[root@KVM ~]#
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egrep -v "^#|^$" /usr/lib/systemd/system/vncserver@\:1.service
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Description=Remote desktop service (VNC)2 B$ J' F6 S) }/ C6 h2 |
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After=syslog.target network.target
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Type=forking: \' I- {# G* @- ^! |( |! Z. U& t
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User=root
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ExecStart=/usr/bin/vncserver %i
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PIDFile=/root/.vnc/%H%i.pid
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2 h; b$ A) t; F$ ]& K4 H2 DExecStop=-/usr/bin/vncserver -kill %i( P5 |' v# \( ^7 w1 t3 |0 Q& X
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WantedBy=multi-user.target
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) R" A F/ U' j[root@KVM ~]# vncpasswd
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9.5启动vnc服务4 f' n2 q; V8 T# I2 F$ z$ Z5 Q
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[root@KVM ~]# systemctl start vncserver@\:1.services
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发表于 2017-8-2 19:20:22