在docker1.12中我们知道docker内置了swarm, 接下来当然会首先来验证这个功能.体验一下是否像docker自己说的那样好. 在使用swarm构筑docker的集群时, 事前需要有所准备, 我们准备3-4台虚拟机,内存和CPU以及Disk不用太多,能动即可.
Node构成
| 节点名称 | IP |
|---|---|
| host31 | 192.168.32.31 |
| host32 | 192.168.32.32 |
| host33 | 192.168.32.33 |
| host34 | 192.168.32.34 |
各节点网络设定
- 关闭防火墙
- 关闭selinux
- 清除iptables规则
可使用下面的脚本，稍微减少本来就不多的动作，有100台以上的节点的话，估计无论多简单你都绝对不想手动操作吧。
[root@host31 ~]# cat set_network.sh
#!/bin/bash
echo "## disable selinux"
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux
grep disabled /etc/sysconfig/selinux
echo "## disable firewalld"
systemctl disable firewalld
systemctl stop firewalld
echo "## clear iptables rules"
iptables -F
[root@host31 ~]#
[root@host31 ~]# sh set_network.sh
## disable selinux
# disabled - No SELinux policy is loaded.
SELINUX=disabled
## disable firewalld
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
## clear iptables rules
[root@host31 ~]#各节点安装docker1.12
可以使用如下脚本，在centos7上进行安装。结合baseurl实际路径，自行修正应该适合其它版本。
[root@host31 ~]# cat /tmp/install_docker.sh
#!/bin/bash
LINUXOS=centos
VERSION=7
echo "## Setting yum repos"
cat > /etc/yum.repos.d/docker.repo <<-EOF
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/experimental/${LINUXOS}/${VERSION}/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF
echo "## yum install docker"
yum install -y docker-engine
echo "## setting restart service for OS boot"
systemctl enable docker
echo "## start docker"
systemctl start docker
echo "## docker version confrim"
docker info |grep Version
[root@host31 ~]#执行结果
[root@host31 ~]# sh /tmp/install_docker.sh
## Setting yum repos
## yum install docker
Loaded plugins: fastestmirror
base | 3.6 kB 00:00:00
dockerrepo | 2.9 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/5): base/7/x86_64/group_gz | 155 kB 00:00:01
(2/5): base/7/x86_64/primary_db | 5.3 MB 00:00:07
(3/5): updates/7/x86_64/primary_db | 6.4 MB 00:00:17
(4/5): dockerrepo/primary_db | 49 kB 00:00:18
extras/7/x86_64/primary_db FAILED
http://mirror.bit.edu.cn/centos/7.2.1511/extras/x86_64/repodata/bafd5e7438d36d63030e1ac0029c7a0be8f20ebc26bf7196c16ce2752fd63dff-primary.sqlite.bz2: [Errno 12] Timeout on http://mirror.bit.edu.cn/centos/7.2.1511/extras/x86_64/repodata/bafd5e7438d36d63030e1ac0029c7a0be8f20ebc26bf7196c16ce2752fd63dff-primary.sqlite.bz2: (28, 'Resolving timed out after 30574 milliseconds')
Trying other mirror.
(5/5): extras/7/x86_64/primary_db | 160 kB 00:00:00
Determining fastest mirrors
* base: mirrors.163.com
* extras: mirrors.163.com
* updates: mirrors.163.com
Resolving Dependencies
--> Running transaction check ---> Package docker-engine.x86_64 0:1.12.0-1.el7.centos will be installed --> Processing Dependency: docker-engine-selinux >= 1.12.0-1.el7.centos for package: docker-engine-1.12.0-1.el7.centos.x86_64 --> Processing Dependency: libcgroup for package: docker-engine-1.12.0-1.el7.centos.x86_64 --> Processing Dependency: libseccomp.so.2()(64bit) for package: docker-engine-1.12.0-1.el7.centos.x86_64 --> Processing Dependency: libltdl.so.7()(64bit) for package: docker-engine-1.12.0-1.el7.centos.x86_64 --> Running transaction check ---> Package docker-engine-selinux.noarch 0:1.12.0-1.el7.centos will be installed --> Processing Dependency: policycoreutils-python for package: docker-engine-selinux-1.12.0-1.el7.centos.noarch ---> Package libcgroup.x86_64 0:0.41-8.el7 will be installed ---> Package libseccomp.x86_64 0:2.2.1-1.el7 will be installed ---> Package libtool-ltdl.x86_64 0:2.4.2-21.el7_2 will be installed --> Running transaction check ---> Package policycoreutils-python.x86_64 0:2.2.5-20.el7 will be installed --> Processing Dependency: libsemanage-python >= 2.1.10-1 for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: audit-libs-python >= 2.1.3-4 for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: python-IPy for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: libqpol.so.1(VERS_1.4)(64bit) for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: libqpol.so.1(VERS_1.2)(64bit) for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: libapol.so.4(VERS_4.0)(64bit) for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: checkpolicy for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: libqpol.so.1()(64bit) for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Processing Dependency: libapol.so.4()(64bit) for package: policycoreutils-python-2.2.5-20.el7.x86_64 --> Running transaction check ---> Package audit-libs-python.x86_64 0:2.4.1-5.el7 will be installed ---> Package checkpolicy.x86_64 0:2.1.12-6.el7 will be installed ---> Package libsemanage-python.x86_64 0:2.1.10-18.el7 will be installed ---> Package python-IPy.noarch 0:0.75-6.el7 will be installed ---> Package setools-libs.x86_64 0:3.3.7-46.el7 will be installed --> Finished Dependency Resolution
Dependencies Resolved
=================================================================================================================================================== Package Arch Version Repository Size
=================================================================================================================================================== Installing:
docker-engine x86_64 1.12.0-1.el7.centos dockerrepo 19 M
Installing for dependencies:
audit-libs-python x86_64 2.4.1-5.el7 base 69 k
checkpolicy x86_64 2.1.12-6.el7 base 247 k
docker-engine-selinux noarch 1.12.0-1.el7.centos dockerrepo 28 k
libcgroup x86_64 0.41-8.el7 base 64 k
libseccomp x86_64 2.2.1-1.el7 base 49 k
libsemanage-python x86_64 2.1.10-18.el7 base 94 k
libtool-ltdl x86_64 2.4.2-21.el7_2 updates 49 k
policycoreutils-python x86_64 2.2.5-20.el7 base 435 k
python-IPy noarch 0.75-6.el7 base 32 k
setools-libs x86_64 3.3.7-46.el7 base 485 k
Transaction Summary
=================================================================================================================================================== Install 1 Package (+10 Dependent packages)
Total download size: 21 M
Installed size: 84 M
Downloading packages:
warning: /var/cache/yum/x86_64/7/base/packages/audit-libs-python-2.4.1-5.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEYETA
Public key for audit-libs-python-2.4.1-5.el7.x86_64.rpm is not installed
(1/11): audit-libs-python-2.4.1-5.el7.x86_64.rpm | 69 kB 00:00:00
(2/11): checkpolicy-2.1.12-6.el7.x86_64.rpm | 247 kB 00:00:01
(3/11): libseccomp-2.2.1-1.el7.x86_64.rpm | 49 kB 00:00:00
(4/11): libsemanage-python-2.1.10-18.el7.x86_64.rpm | 94 kB 00:00:00
(5/11): libcgroup-0.41-8.el7.x86_64.rpm | 64 kB 00:00:01
(6/11): python-IPy-0.75-6.el7.noarch.rpm | 32 kB 00:00:00
(7/11): setools-libs-3.3.7-46.el7.x86_64.rpm | 485 kB 00:00:00
(8/11): policycoreutils-python-2.2.5-20.el7.x86_64.rpm | 435 kB 00:00:01
Public key for libtool-ltdl-2.4.2-21.el7_2.x86_64.rpm is not installed==- ] 423 kB/s | 3.8 MB 00:00:40 ETA
(9/11): libtool-ltdl-2.4.2-21.el7_2.x86_64.rpm | 49 kB 00:00:06
warning: /var/cache/yum/x86_64/7/dockerrepo/packages/docker-engine-selinux-1.12.0-1.el7.centos.noarch.rpm: Header V4 RSA/SHA512 Signature, key ID 2c52609d: NOKEY
Public key for docker-engine-selinux-1.12.0-1.el7.centos.noarch.rpm is not installed
(10/11): docker-engine-selinux-1.12.0-1.el7.centos.noarch.rpm | 28 kB 00:00:12
(11/11): docker-engine-1.12.0-1.el7.centos.x86_64.rpm | 19 MB 00:00:51
--------------------------------------------------------------------------------------------------------------------------------------------------- Total 409 kB/s | 21 MB 00:00:51
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-2.1511.el7.centos.2.10.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Retrieving key from https://yum.dockerproject.org/gpg
Importing GPG key 0x2C52609D:
Userid : "Docker Release Tool (releasedocker) <docker@docker.com>"
Fingerprint: 5811 8e89 f3a9 1289 7c07 0adb f762 2157 2c52 609d
From : https://yum.dockerproject.org/gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : libcgroup-0.41-8.el7.x86_64 1/11
Installing : libsemanage-python-2.1.10-18.el7.x86_64 2/11
Installing : audit-libs-python-2.4.1-5.el7.x86_64 3/11
Installing : libseccomp-2.2.1-1.el7.x86_64 4/11
Installing : python-IPy-0.75-6.el7.noarch 5/11
Installing : checkpolicy-2.1.12-6.el7.x86_64 6/11
Installing : libtool-ltdl-2.4.2-21.el7_2.x86_64 7/11
Installing : setools-libs-3.3.7-46.el7.x86_64 8/11
Installing : policycoreutils-python-2.2.5-20.el7.x86_64 9/11
Installing : docker-engine-selinux-1.12.0-1.el7.centos.noarch 10/11
restorecon: lstat(/var/lib/docker) failed: No such file or directory
warning: %post(docker-engine-selinux-1.12.0-1.el7.centos.noarch) scriptlet failed, exit status 255
Non-fatal POSTIN scriptlet failure in rpm package docker-engine-selinux-1.12.0-1.el7.centos.noarch
Installing : docker-engine-1.12.0-1.el7.centos.x86_64 11/11
Verifying : setools-libs-3.3.7-46.el7.x86_64 1/11
Verifying : docker-engine-selinux-1.12.0-1.el7.centos.noarch 2/11
Verifying : libcgroup-0.41-8.el7.x86_64 3/11
Verifying : libtool-ltdl-2.4.2-21.el7_2.x86_64 4/11
Verifying : checkpolicy-2.1.12-6.el7.x86_64 5/11
Verifying : python-IPy-0.75-6.el7.noarch 6/11
Verifying : libseccomp-2.2.1-1.el7.x86_64 7/11
Verifying : docker-engine-1.12.0-1.el7.centos.x86_64 8/11
Verifying : audit-libs-python-2.4.1-5.el7.x86_64 9/11
Verifying : policycoreutils-python-2.2.5-20.el7.x86_64 10/11
Verifying : libsemanage-python-2.1.10-18.el7.x86_64 11/11
Installed:
docker-engine.x86_64 0:1.12.0-1.el7.centos
Dependency Installed:
audit-libs-python.x86_64 0:2.4.1-5.el7 checkpolicy.x86_64 0:2.1.12-6.el7 docker-engine-selinux.noarch 0:1.12.0-1.el7.centos
libcgroup.x86_64 0:0.41-8.el7 libseccomp.x86_64 0:2.2.1-1.el7 libsemanage-python.x86_64 0:2.1.10-18.el7
libtool-ltdl.x86_64 0:2.4.2-21.el7_2 policycoreutils-python.x86_64 0:2.2.5-20.el7 python-IPy.noarch 0:0.75-6.el7
setools-libs.x86_64 0:3.3.7-46.el7
Complete!
## setting restart service for OS boot
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
## start docker
## docker version confrim
WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
Server Version: 1.12.0
Library Version: 1.02.107-RHEL7 (2015-10-14)
Kernel Version: 3.10.0-327.el7.x86_64
[root@host31 ~]#