Docker requires a Linux kernel version of 3.8 or higher, you must check the kernel version of the host operating system before installation. Otherwise, if the kernel is lower than 3.8, Docker can be successfully installed, but after entering Docker, it will automatically exit. .<\/p>\n
1. Download and install\u00a0CentOS<\/a>\u00a06.9<\/strong><\/p>\n CentOS 6 series, the latest version is 6.9, because Docker can only run on 64-bit systems, so select an image\u00a0download CentOS 6.9 64-bit<\/a>\u00a0CentOS official website<\/p>\n 2, upgrade CentOS Linux kernel<\/strong><\/p>\n CentOS 6.9 default linux kernel version is 2.6, CentOS 7 default linux kernel version is 3.10, so for CentOS 6.9 you need to upgrade the kernel version<\/p>\n 1) Enter the URL of the updated linux kernel http:\/\/elrepo.org\/tiki\/tiki-index.php<\/p>\n 2) Follow the instructions to update the kernel and execute the following command in the root account<\/p>\n (1) import public key<\/p>\n (2) Install ELRepo<\/p>\n For Centos 6,<\/p>\n For Cenos7,<\/p>\n (3) Install the kernel<\/p>\n Long-term supported version, stable (recommended)<\/p>\n Mainline version (mainline)<\/p>\n (4) modify the Grub boot sequence, set the default startup of the newly upgraded kernel<\/p>\n Edit grub.conf file<\/p>\n Modify default to the location of the newly installed kernel<\/p>\n (5) Restart, kernel upgrade completed<\/p>\n 3, install docker<\/strong><\/p>\n (1) disable selinux<\/p>\n Because selinux and LXC have conflicts, selinux is disabled<\/p>\n (2) Configure\u00a0Fedora<\/a>\u00a0EPEL source<\/p>\n Because Docker 6.x and 7.x installation docker is a little different, the docker installation package for CentOS 6.x is called docker-io, which comes from the Fedora epel library. This repository maintains a large number of packages that are not included in the distribution. Software, so first install EPEL, and docker for CentOS 7.x is directly included in the Extras repository of the official image source (the [extras] section enable=1 enable under CentOS-Base.repo)<\/p>\n (3) Install docker<\/p>\n Install docker-io<\/p>\n (4) start docker<\/p>\n (5) Check Docker Version<\/p>\n (6) Perform docker hello-world<\/p>\n Pull hello-world image<\/p>\n Run hello-world<\/p>\n The above output message indicates that Docker has been completely installed<\/p>\n 4, uninstall Docker<\/strong><\/p>\n If you want to uninstall docker, it is very simple, check the docker installation package<\/p>\n Then delete the installation package<\/p>\n Delete a mirror or container<\/p>\n Docker requires a Linux kernel version of 3.8 or higher, you must check the kernel version of the host operating system before installation. Otherwise, if the kernel is lower than 3.8, Docker can be successfully installed, but after entering Docker, it will automatically exit. .<\/p>\n 1. Download and install CentOS 6.9<\/p>\n CentOS 6 series, the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7349"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7349"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7349\/revisions"}],"predecessor-version":[{"id":7350,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7349\/revisions\/7350"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}rpm --import<\/span>\u00a0https:<\/span>\/\/www.elrepo.org\/RPM-GPG-KEY-elrepo.org<\/span><\/span><\/code><\/pre>\nrpm -Uvh\u00a0http:<\/span>\/\/www.elrepo.org\/elrepo-release-6-6.el6.elrepo.noarch.rpm<\/span><\/span><\/code><\/pre>\nrpm -Uvh http:\/\/www.elrepo.org\/elrepo-release<\/span>-7.0<\/span>-2.<\/span>el7.elrepo.noarch.rpm (external<\/span> link<\/span>)<\/span><\/code><\/pre>\nyum --enablerepo=elrepo-kernel install -y kernel<\/span>-lt<\/span><\/span><\/span><\/code><\/pre>\nyum --enablerepo=elrepo-kernel install -y kernel-ml<\/span><\/span><\/code><\/pre>\nvi<\/span> \/etc\/grub.conf<\/span><\/code><\/pre>\n# grub.conf generated by anaconda<\/span><\/span>\r\n#<\/span><\/span>\r\ndefault<\/span>=0<\/span> <\/span>\r\ntimeout=5<\/span><\/span>\r\nsplashimage=(hd0,0<\/span>)\/boot\/grub\/splash.xpm.gz<\/span>\r\nhiddenmenu<\/span>\r\ntitle CentOS (3.10<\/span>.28<\/span>-1.<\/span>el6.elrepo.x86_64)<\/span>\r\n root (hd0,0<\/span>)<\/span>\r\n kernel \/boot\/vmlinuz-3.10<\/span>.28<\/span>-1.<\/span>el6.elrepo.x86_64 ro root=UUID=0<\/span>a05411f-16f<\/span>2-4d<\/span>69-beb0-2d<\/span>b4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8<\/span> rd_NO_LVM rd_NO_DM rhgb quiet<\/span>\r\n initrd \/boot\/initramfs-3.10<\/span>.28<\/span>-1.<\/span>el6.elrepo.x86_64.img<\/span>\r\ntitle CentOS (2.6<\/span>.32<\/span>-431.3<\/span>.1<\/span>.el6.x86_64)<\/span>\r\n root (hd0,0<\/span>)<\/span>\r\n kernel \/boot\/vmlinuz-2.6<\/span>.32<\/span>-431.3<\/span>.1<\/span>.el6.x86_64 ro root=UUID=0<\/span>a05411f-16f<\/span>2-4d<\/span>69-beb0-2d<\/span>b4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8<\/span> rd_NO_LVM rd_NO_DM rhgb quiet<\/span>\r\n initrd \/boot\/initramfs-2.6<\/span>.32<\/span>-431.3<\/span>.1<\/span>.el6.x86_64.img<\/span><\/code><\/pre>\nreboot<\/span><\/code><\/pre>\nvi<\/span> \/etc\/selinux\/config<\/span><\/code><\/pre>\n# This file controls the state of SELinux on the system.<\/span><\/span>\r\n# SELINUX= can take one of these three values:<\/span><\/span>\r\n# enforcing - SELinux security policy is enforced.<\/span><\/span>\r\n# permissive - SELinux prints warnings instead of enforcing.<\/span><\/span>\r\n# disabled - SELinux is fully disabled.<\/span><\/span>\r\nSELINUX<\/span>=disabled<\/span>\r\n# SELINUXTYPE= type of policy in use. Possible values are:<\/span><\/span>\r\n# targeted - Only targeted network daemons are protected.<\/span><\/span>\r\n# strict - Full SELinux protection.<\/span><\/span>\r\nSELINUXTYPE<\/span>=targeted<\/span><\/code><\/pre>\nyum -y install<\/span> http<\/span>:\/\/dl.fedoraproject.org\/pub\/epel\/6<\/span>\/x86_64\/epel-release<\/span>-6<\/span>-8.<\/span>noarch.rpm<\/span><\/code><\/pre>\nyum install -y docker-io<\/span><\/span><\/code><\/pre>\nservice<\/span> docker start<\/span><\/code><\/pre>\ndocker<\/span> version<\/span><\/code><\/pre>\nClient version: 1.7.1<\/span>\r\nClient API version: 1.19<\/span>\r\nGo version (client): go1.4.2<\/span>\r\nGit commit<\/span> (client<\/span>): 786<\/span>b29d\/1.7<\/span>.1<\/span><\/span>\r\nOS\/Arch (client<\/span>): linux\/amd64<\/span>\r\nServer<\/span> version<\/span>: 1.7<\/span>.1<\/span><\/span>\r\nServer<\/span> API version<\/span>: 1.19<\/span><\/span>\r\nGo<\/span> version<\/span> (server<\/span>): go1.4<\/span>.2<\/span><\/span>\r\nGit commit<\/span> (server<\/span>): 786<\/span>b29d\/1.7<\/span>.1<\/span><\/span>\r\nOS\/Arch (server<\/span>): linux\/amd64<\/span><\/code><\/pre>\ndocker<\/span> pull hello-world<\/span><\/code><\/pre>\ndocker<\/span> run hello-world<\/span><\/code><\/pre>\nHello from<\/span> Docker.<\/span>\r\nThis<\/span> message shows that your installation appears to be working correctly.<\/span>\r\n\r\nTo generate this<\/span> message, Docker took the following steps:<\/span>\r\n 1<\/span>. The Docker client contacted the Docker daemon.<\/span>\r\n 2<\/span>. The Docker daemon pulled the \"hello-world\"<\/span> image from<\/span> the Docker Hub.<\/span>\r\n (Assuming it was not already locally available.)<\/span>\r\n 3<\/span>. The Docker daemon created a new<\/span> container from<\/span> that image which<\/span> runs the<\/span>\r\n executable that produces the output you are currently reading.<\/span>\r\n 4<\/span>. The Docker daemon streamed that output to the Docker client, which<\/span> sent it<\/span>\r\n to your terminal.<\/span>\r\n\r\nTo try<\/span> something more ambitious, you can run an <\/span>Ubuntu<\/a> container with:<\/span>\r\n $ docker run -it ubuntu bash<\/span>\r\n\r\nFor<\/span> more examples and ideas, visit:<\/span>\r\n http:\/\/docs.docker.com\/userguide\/<\/span><\/span><\/code><\/pre>\nyum list<\/span> installed | grep docker<\/span><\/code><\/pre>\nyum -y remove docker-io<\/span>.x86_64<\/span><\/code><\/pre>\nrm -rf \/var<\/span>\/lib\/docker<\/span><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"