{"id":1106,"date":"2022-04-04T15:13:48","date_gmt":"2022-04-04T07:13:48","guid":{"rendered":"https:\/\/www.buyao007.icu\/?p=1106"},"modified":"2022-04-05T16:04:01","modified_gmt":"2022-04-05T08:04:01","slug":"3-kvm%e8%99%9a%e6%8b%9f%e6%9c%ba%e7%a3%81%e7%9b%98%e3%80%81%e5%bf%ab%e7%85%a7%e5%92%8c%e5%85%8b%e9%9a%86%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.buyao007.icu\/?p=1106","title":{"rendered":"3.KVM\u865a\u62df\u673a\u78c1\u76d8\u3001\u5feb\u7167\u548c\u514b\u9686\u7ba1\u7406"},"content":{"rendered":"\n<p>\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6\u7fa4\u67b6\u6784\u4e0e\u81ea\u52a8\u5316\u8fd0\u7ef4\uff0c\u66fe\u8d1f\u8d23\u56fd\u5185\u67d0\u5927\u578b\u535a\u5ba2\u7f51\u7ad9\u8fd0\u7ef4\u5de5\u4f5c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">1.\u78c1\u76d8\u7ba1\u7406<\/h2>\n\n\n\n<p><strong><em>1.\u865a\u62df\u673a\u7684\u78c1\u76d8\u683c\u5f0f<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>raw\u683c\u5f0f<\/strong>\uff1a\u4fd7\u79f0\u88f8\u683c\u5f0f\uff0c\u5360\u7528\u7a7a\u95f4\u5927\uff0c\u4e0d\u652f\u6301\u5feb\u7167\u529f\u80fd\uff0c\u4e0d\u65b9\u4fbf\u4f20\u8f93\uff0c\u8bfb\u5199\u6027\u80fd\u8f83\u597d    \u4e0d\u65b9\u4fbf\u4f20\u8f93\u662f\u56e0\u4e3a\uff0c\u5206\u914d\u4e8650G\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u7528\u4e861G\uff0c\u5728\u4f20\u8f93\u65f6\u4f20\u8f93\u7684\u5927\u5c0f\u662f50G\uff0c\u76f8\u5f53\u4e8eVM\u865a\u62df\u673a\u7acb\u5373\u5206\u914d\u6240\u6709\u7a7a\u95f4         raw\u683c\u5f0f\u8fd8\u6709\u4e00\u4e2a\u597d\u5904\u662f\uff0c\u53ef\u4ee5\u5728\u5bbf\u4e3b\u673a\u4e0a\u6302\u8f7d\u4f7f\u7528  \u6302\u8f7d\u65b9\u6cd5\uff1a\r\n&#91;root@test ~]# fdisk \/opt\/centos7.raw \r\n \u8f93\u5165p\uff0c\u627e\u5230start\u503c \u7136\u540e\u4f7f\u7528\u503c*512 \u7136\u540e\u6302\u8f7d\u4f7f\u7528\r\n&#91;root@test ~]# mount -o loop,offset=1048576 \/opt\/centos7.raw \/srv\/###offset\u662f\u4e0a\u9762\u4e58\u4ee5512\u7684\u503c\u3002\r\n\u6302\u8f7d\u4e4b\u540e\u53ef\u4ee5\u8fdb\u5165\u4fee\u6539\u7f51\u5361\u8be5\u5bc6\u7801\u7b49\u6240\u6709\u64cd\u4f5c\r\n\u5b89\u88c5\u65f6\u6267\u884c\u7684\u547d\u4ee4virt-install --virt-type kvm --os-type=linux --os-variant rhel7 --name centos7 --memory 1024 --vcpu 1 --disk \/opt\/centos2.raw,format=raw,size=10 --cdrom \/opt\/CentOS-7-x86_64-Minimal-2003.iso --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole\r\n<strong>qcow2\u683c\u5f0f<\/strong>\uff1a\u662fqcow\uff08copy on write\uff09\u7684\u5347\u7ea7\u7248\uff0c\u5360\u7528\u7a7a\u95f4\u5c0f\uff0c\u652f\u6301\u5feb\u7167\uff0c\u6027\u80fd\u6bd4raw\u5dee\u4e00\u70b9\uff0c\u65b9\u4fbf\u4f20\u8f93    \u662f\u56e0\u4e3a\uff0c\u5206\u914d\u4e8650G\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u7528\u4e861G\uff0c\u5728\u4f20\u8f93\u65f6\u4f20\u8f93\u7684\u5927\u5c0f\u662f1G \r\n\u5b89\u88c5\u65f6\u6267\u884c\u7684\u547d\u4ee4virt-install --virt-type kvm --os-type=linux --os-variant rhel7 --name centos7 --memory 1024 --vcpu 1 --disk \/opt\/centos2.qcow2,format=qcow2,size=10 --cdrom \/opt\/CentOS-7-x86_64-Minimal-2003.iso --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole\r<\/code><\/pre>\n\n\n\n<p><strong><em>2.\u67e5\u770b\u78c1\u76d8\u4fe1\u606finfo<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;root@test \/opt]# qemu-img info centos7.raw \r\nimage: centos7.raw\r\nfile format: raw\r\nvirtual size: 10G (10737418240 bytes)\r\ndisk size: 1.5G\r<\/code><\/pre>\n\n\n\n<p><strong><em>3.\u521b\u5efa\u78c1\u76d8create<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##-f \u540e\u7684\u4e09\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u662f\u78c1\u76d8\u7684\u683c\u5f0f\uff0c\u7b2c\u4e8c\u4e2a\u662f\u78c1\u76d8\u7684\u540d\u79f0\u8def\u5f84\uff0c\u7b2c\u4e09\u4e2a\u662f\u78c1\u76d8\u7684\u5927\u5c0f\r\n#\u521b\u5efa\u4e00\u4e2aqcow2\u683c\u5f0f\u7684\u786c\u76d8\r\n&#91;root@test \/opt]# qemu-img create -f qcow2 \/opt\/sfy.qcow2 1G\r\nFormatting '\/opt\/sfy.qcow2', fmt=qcow2 size=1073741824 encryption=off cluster_size=65536 lazy_refcounts=off \r\n&#91;root@test \/opt]# ll -h \/opt\/sfy.qcow2 \r\n-rw-r--r-- 1 root root 192K Jul 18 11:46 \/opt\/sfy.qcow2\r\n&#91;root@test \/opt]# qemu-img info sfy.qcow2 \r\nimage: sfy.qcow2\r\nfile format: qcow2\r\nvirtual size: 1.0G (1073741824 bytes)\r\ndisk size: 192K\r\ncluster_size: 65536\r\nFormat specific information:\r\n    compat: 1.1\r\nlazy refcounts: false\r\n#\u521b\u5efa\u4e00\u4e2araw\u683c\u5f0f\u7684\u786c\u76d8\r\n&#91;root@test \/opt]# qemu-img create -f raw \/opt\/sfy.raw 1G\r\nFormatting '\/opt\/sfy.raw', fmt=raw size=1073741824 \r\n&#91;root@test \/opt]# qemu-img info sfy.raw \r\nimage: sfy.raw\r\nfile format: raw\r\nvirtual size: 1.0G (1073741824 bytes)\r\ndisk size: 0\r\n\u521b\u5efa\u78c1\u76d8\u6302\u8f7d\u5230\u865a\u62df\u673a\u4e0a\uff0c\u9700\u8981\u5728\u914d\u7f6e\u6587\u4ef6\u641c\u7d22disk type\uff0c\u7136\u540e\u590d\u5236\u8fd9\u4e2a\u6a21\u5757\u7684\u5185\u5bb9\u6539\u5427\u6539\u5427\u5373\u53ef\r<\/code><\/pre>\n\n\n\n<p><strong><em>4.\u78c1\u76d8\u6269\u5bb9resize<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##\u6269\u5bb92G\r\n&#91;root@test \/opt]# qemu-img resize \/opt\/sfy.raw +2G\r\nImage resized.\r\n&#91;root@test \/opt]# qemu-img info \/opt\/sfy.raw \r\nimage: \/opt\/sfy.raw\r\nfile format: raw\r\nvirtual size: 3.0G (3221225984 bytes)\r\ndisk size: 0\r\n##\u6269\uff08\u7f29\uff09\u5bb9\u81f32G\r\n&#91;root@test \/opt]# qemu-img resize \/opt\/sfy.raw 2G\r\nImage resized.\r\n&#91;root@test \/opt]# qemu-img info \/opt\/sfy.raw \r\nimage: \/opt\/sfy.raw\r\nfile format: raw\r\nvirtual size: 2.0G (2147483648 bytes)\r\ndisk size: 0\r\n##\u7f29\u5bb91G\r\n&#91;root@test \/opt]# qemu-img resize \/opt\/sfy.raw -1G\r\nImage resized.\r\n&#91;root@test \/opt]# qemu-img info \/opt\/sfy.raw \r\nimage: \/opt\/sfy.raw\r\nfile format: raw\r\nvirtual size: 1.0G (1073741824 bytes)\r\ndisk size: 0\r<\/code><\/pre>\n\n\n\n<p><strong><em>5.\u78c1\u76d8\u683c\u5f0f\u8f6c\u6362convert<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##\u6ce8\u610f\u4fee\u6539\u78c1\u76d8\u683c\u5f0f\uff0c\u5fc5\u987b\u5904\u4e8e\u5173\u673a\u72b6\u6001\u4e0b\r\n-f \u78c1\u76d8\u539f\u683c\u5f0f -O\u78c1\u76d8\u65b0\u683c\u5f0f \u539f\u683c\u5f0f\u78c1\u76d8\u8def\u5f84 \u65b0\u683c\u5f0f\u78c1\u76d8\u8def\u5f84\r\n&#91;root@test \/opt]# time qemu-img convert -f raw -O qcow2 \/opt\/centos7.raw \/opt\/centos7.qcow2\r\n#\u4fee\u6539\u865a\u62df\u673a\u914d\u7f6e\u6587\u4ef6\u78c1\u76d8\u683c\u5f0f\r\n&#91;root@test \/opt]# grep qcow2 \/etc\/libvirt\/qemu\/web01.xml \r\n      &lt;driver name='qemu' type='qcow2'\/>\r\n      &lt;source file='\/opt\/centos7.qcow2'\/>\r<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">2.\u865a\u62df\u673a\u7684\u5feb\u7167\u7ba1\u7406<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>snapshot-create\u521b\u5efa\u5feb\u7167\u4e0d\u652f\u6301\u81ea\u5b9a\u4e49\u540d\u79f0\r\nsnapshot-create-as\u652f\u6301\u81ea\u5b9a\u4e49\u540d\u79f0\r\nraw\u683c\u5f0f\u65e0\u6cd5\u521b\u5efa\u5feb\u7167\uff0cqcow2\u683c\u5f0f\u53ef\u4ee5\u521b\u5efa\u5feb\u7167\uff0c\u662f\u57fa\u4e8e\u78c1\u76d8\u521b\u5efa\u7684\u5feb\u7167\uff0c\u5373\u5feb\u7167\u662f\u4fdd\u5b58\u5728qcow2\u78c1\u76d8\u6587\u4ef6\u91cc\u7684\r<\/code><\/pre>\n\n\n\n<p><strong><em>1.\u521b\u5efa\u5feb\u7167snapshot-create\u3001snapshot-create-as\u548c\u67e5\u770b\u5feb\u7167snapshot-list<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##snapshot-create\u521b\u5efa\u865a\u62df\u673a\u5feb\u7167\r\n&#91;root@test \/opt]# virsh snapshot-create web01 \r\nDomain snapshot 1626588992 created\r\n&#91;root@test \/opt]# virsh snapshot-list  web01 \r\n Name                 Creation Time             State\r\n------------------------------------------------------------\r\n 1626588992           2021-07-18 14:16:32 +0800 running\r\n##snapshot-create-as\u521b\u5efa\u865a\u62df\u673a\u5feb\u7167\r\n&#91;root@test \/opt]# virsh snapshot-create-as web01 --name \u521a\u521b\u5efa\u7684\u865a\u62df\u673a\r\nDomain snapshot \u521a\u521b\u5efa\u7684\u865a\u62df\u673a created\r\n&#91;root@test \/opt]# virsh snapshot-list  web01 \r\n Name                 Creation Time             State\r\n------------------------------------------------------------\r\n 1626588992           2021-07-18 14:16:32 +0800 running\r\n \u521a\u521b\u5efa\u7684\u865a\u62df\u673a 2021-07-18 14:19:36 +0800 running\r<\/code><\/pre>\n\n\n\n<p><strong><em>2.\u5220\u9664\u5feb\u7167snapshot-delete<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;root@test \/opt]# virsh snapshot-delete  web01 --snapshotname 1626588992 \r\nDomain snapshot 1626588992 deleted\r\n\r\n&#91;root@test \/opt]# virsh snapshot-list  web01 \r\n Name                 Creation Time             State\r\n------------------------------------------------------\r\n \u521a\u521b\u5efa\u7684\u865a\u62df\u673a 2021-07-18 14:19:36 +0800 running\r<\/code><\/pre>\n\n\n\n<p><strong><em>3.\u6062\u590d\u5feb\u7167snapshot-revert<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;root@test \/opt]# virsh snapshot-revert  web01 --snapshotname \u521a\u521b\u5efa\u7684\u865a\u62df\u673a<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"toc_0\">3.\u865a\u62df\u673a\u7684\u514b\u9686<\/h2>\n\n\n\n<p><strong><em>1.\u5b8c\u6574\u514b\u9686virt-clone \u81ea\u52a8<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u521b\u5efa\u514b\u9686 -o \u8001\u7684\u865a\u62df\u673a\u540d\u79f0 -n \u65b0\u7684\u865a\u62df\u673a\u540d\u79f0\u2014auto-clone\u81ea\u52a8\u5206\u914d\u865a\u62df\u673a\u78c1\u76d8\u4f4d\u7f6e\r\n&#91;root@test \/opt]# virt-clone -o web01 -n web02 --auto-clone\r\nAllocating 'centos7-clone.qcow2'                                                    |  12 GB  00:00:09     \r\n\r\nClone 'web02' created successfully.\r\n##--file \u6307\u5b9a\u514b\u9686\u540e\u7684\u865a\u62df\u673a\u78c1\u76d8\u5b58\u653e\u4f4d\u7f6e\r\n&#91;root@test \/opt]# virt-clone -o web01 -n web03 --file \/opt\/web03.qcow2\r\nAllocating 'web03.qcow2'                                                            |  12 GB  00:00:03     \r\n\r\nClone 'web03' created successfully\r<\/code><\/pre>\n\n\n\n<p><strong><em>2.\u5b8c\u6574\u514b\u9686\u624b\u52a8<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##\u521b\u5efa\u78c1\u76d8\u6587\u4ef6###\uff08\u6ce8\u610f\u8fd9\u91cc\u662f\u521b\u5efa\uff0c\u4e0d\u662f\u590d\u5236\uff0c\u590d\u5236\u7684\u9700\u8981\u91cd\u542flibvertd\u670d\u52a1\uff09\r\n&#91;root@test \/opt]# qemu-img convert -f qcow2 -O qcow2 -c web03.qcow2 web02.qcow2 \r\n##\u521b\u5efa\u865a\u62df\u673a\u914d\u7f6e\u6587\u4ef6\r\n&#91;root@test \/opt]# virsh dumpxml web03 > vm_web02.xml\r\n#\u5bfc\u5165\u914d\u7f6e\u6587\u4ef6\r\n&#91;root@test \/opt]# virsh define \/opt\/vm_web02.xml\r\n&#91;root@test \/opt]# virsh list --all\r\n Id    Name                           State\r\n----------------------------------------------------\r\n 1     web01                          running\r\n 2     web02                          running\r\n -     web03                          shut off\r\n###\u4fee\u6539\u914d\u7f6e\u6587\u4ef6\r\n&#91;root@test \/opt]# virsh edit web02\r\n\u4fee\u6539&lt;name>\r\n\u5220\u9664&lt;uuid>\r\n\u5220\u9664&lt;mac address\r\n\u4fee\u6539&lt;source file\r<\/code><\/pre>\n\n\n\n<p><strong><em>3.\u94fe\u63a5\u514b\u9686##\u53ea\u80fd\u624b\u52a8\u64cd\u4f5c<\/em><\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>##-b \u57fa\u4e8eweb04.qcow2 \u521b\u5efaweb05.qcow2\r\n&#91;root@test \/opt]# qemu-img create -f qcow2 -b web04.qcow2 web05.qcow2 \r\nFormatting 'web05.qcow2', fmt=qcow2 size=12884901888 backing_file='web04.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off \r\n&#91;root@test \/opt]# qemu-img info web05.qcow2 \r\nimage: web05.qcow2\r\nfile format: qcow2\r\nvirtual size: 12G (12884901888 bytes)\r\ndisk size: 196K\r\ncluster_size: 65536\r\nbacking file: web04.qcow2#####\u57fa\u4e8eweb04.qcow2\u521b\u5efa\r\nFormat specific information:\r\n    compat: 1.1\r\nlazy refcounts: false\r\n##\u521b\u5efa\u914d\u7f6e\u6587\u4ef6\r\n&#91;root@test \/opt]# virsh dumpxml web04 >vm_web05.xml\r\n\u4fee\u6539\u914d\u7f6e\u6587\u4ef6\uff0c\u540d\u79f0\u3001id\u3001mac\u3001\u8fd8\u6709\u78c1\u76d8\u6587\u4ef6\u8def\u5f84\u7b49\r\n&#91;root@test \/opt]# vim \/opt\/vm_web05.xml\r\n&#91;root@test \/opt]# virsh define \/opt\/vm_web05.xml \r\nDomain web05 defined from \/opt\/vm_web05.xml\r\n\r\n&#91;root@test \/opt]# virsh list --all\r\n Id    Name                           State\r\n----------------------------------------------------\r\n 1     web01                          running\r\n 2     web04                          running\r\n 4     web03                          running\r\n -     web02                          shut off\r\n -     web05                          shut off\r\n\r\n\u5bfc\u51fa\u914d\u7f6e\u6587\u4ef6\u7684\u65f6\u5019\u4f1a\u53d1\u73b0\u591a\u4e86\u4e00\u4e2asource\u6587\u4ef6\uff0c\u4f9d\u8d56\u6587\u4ef6\r\n&#91;root@test \/opt]# virsh dumpxml web05 |grep qcow2\r\n      &lt;driver name='qemu' type='qcow2'\/>\r\n      &lt;source file='\/opt\/web05.qcow2'\/>\r\n        &lt;source file='\/opt\/web04.qcow2'\/>\r<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5b59\u5bcc\u9633\uff0c \u6c5f\u6e56\u4eba\u79f0\u6ca1\u4eba\u79f0\u3002\u591a\u5e74\u4e92\u8054\u7f51\u8fd0\u7ef4\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u66fe\u8d1f\u8d23\u8fc7\u5b59\u5e03\u65af\u5927\u89c4\u6a21\u96c6\u7fa4\u67b6\u6784\u81ea\u52a8\u5316\u8fd0\u7ef4\u7ba1\u7406\u5de5\u4f5c\u3002\u64c5\u957fWeb\u96c6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"_links":{"self":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/1106"}],"collection":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1106"}],"version-history":[{"count":2,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/1106\/revisions"}],"predecessor-version":[{"id":1109,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=\/wp\/v2\/posts\/1106\/revisions\/1109"}],"wp:attachment":[{"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.buyao007.icu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}