使用Debian Lenny为一家小公司建立一个简单的高可用性Web服务器
本教程是针对Debian Lenny发行版编写的，并假设用户了解Linux的负载平衡以及一些基本技能，如果主机停止响应，则我们的两个负载平衡器由两台监视对方（心跳）的机器组成次要[备份]将采取主角色[备份 - >主]。
对于此设置，我们将需要3个IP地址，每个节点2个，主节点将使用的一个虚拟IP地址（主节点将捕获此IP）。 最后我们将安装Apache作为我们的Web服务器。
1.在两个节点上启用IPVS
IPVS（IP虚拟服务器）：
lb01 / lb02
echo ip_vs_dh >> /etc/modules
echo ip_vs_ftp >> /etc/modules
echo ip_vs >> /etc/modules
echo ip_vs_lblc >> /etc/modules
echo ip_vs_lblcr >> /etc/modules
echo ip_vs_lc >> /etc/modules
echo ip_vs_nq >> /etc/modules
echo ip_vs_rr >> /etc/modules
echo ip_vs_sed >> /etc/modules
echo ip_vs_sh >> /etc/modules
echo ip_vs_wlc >> /etc/modules
echo ip_vs_wrr >> /etc/modules
modprobe ip_vs_dh
modprobe ip_vs_ftp
modprobe ip_vs
modprobe ip_vs_lblc
modprobe ip_vs_lblcr
modprobe ip_vs_lc
modprobe ip_vs_nq
modprobe ip_vs_rr
modprobe ip_vs_sed
modprobe ip_vs_sh
modprobe ip_vs_wlc
modprobe ip_vs_wrr
如果你收到错误，这意味着你没有使用debian lenny或者你已经重新编译了lenny原始内核。 内核必须用IPVS编译。
2.在负载平衡器上安装Ultra Monkey
要安装Ultra Monkey，请编辑/etc/apt/sources.list并添加这两行（不要删除其他存储库）：
lb01 / lb02
pico /etc/apt/sources.list
deb http://www.ultramonkey.org/download/latest/ sarge main
deb-src http://www.ultramonkey.org/download/latest sarge main
接下来我们这样做：
lb01 / lb02
apt-get update
如果你收到这个错误...
W: GPG error: http://www.ultramonkey.org sarge Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 03C0023E05410E97
W: You may want to run apt-get update to correct these problems
...有很少的解决方法，但这里是最值得信赖的工作！
创建一个名为： key.asc的文件，并使用以下代码：
pico /home/key.asc
-----BEGIN PGP PUBLIC KEY BLOCK----- Version: SKS 1.1.0 mQGiBEOBaH4RBACmZGWUpGxm6fOtwvrlOu38+cSh6iwdr9KMeNc9+qna8Ena3sEqV2FX9qxj aALm/VnrfbtUu823VpjpiNy7rMjvOl17omDS8v4S6HSBRFuOFxmIoPi4BLDPlTWhfTYZJ3rH Gx/2J3JFjvzkVoM1Htq1jbeZzzqPaHAvGJrnIY+6DwCg7aCaaKfOQzwaVeTq1jhu4zH0MMsD /00cd61uRttV97JBGBDx4Zwp5CBzlnra24kZkHf43iQiexI7JzOx0xvqmbAhz2Aei3UcQXM7 c90EaA6FgFJplaRFUcwYJkdxu3+quK0R1EmKmDA50ugiUzu8qt30ODBoJav7ZM8/pq4DvcrT mHLBK/hlKOcAhAVrAqwTztynILPdA/0YRs8GYGIqrAEKfX4/8mhBbCCrD6yJViohbSJ3lRTD jKnMI3vNj/+s6eeT9B1vF8CyEuzZufmEBXL329CnhDRNWaVbTgpBl/GLI1FSXTiDSnDGdReP mF7h5HHlL0IFwWTYl+oiXz5RF2hAOUALIxfX+RQTU6mH/Raz59VH2j7pW7QfU2ltb24gSG9y bWFuIDxob3Jtc0BkZWJpYW4ub3JnPohGBBARAgAGBQJDgW2HAAoJENUjpuZgBiiEx2AAn0dk OefzVqNYB+CmQgOgRjS5A/fnAJsHVdO3i/8NckSuQeJ9z/MyO6iCE4hGBBARAgAGBQJDgW+R AAoJEBcFOQ7mbJuwAGQAoJDv1/chu75aQOIxK5DIQEZ09jRVAJwJtwDyqgdUnd1AEc//OrNZ 1kIuwohGBBARAgAGBQJDgXq1AAoJEFPlmVtRVTMKiCYAn1KlsPSPSdWFeAiHf3Qm54gXH9Yp AJ9DIJ4jy1Z9IXfp9i1fVnwKHicZxohGBBARAgAGBQJIQuQaAAoJEPaNV/uq5zQnFQEAn0cZ cG/XW3nZn7XJkmTQ7BhCct7wAKCFofIDm0ecW2LIku5W3ByRpwpTYIhGBBARAgAGBQJJt0yC AAoJEBjYpOLQ7bZNKBsAn15fxX5vOVPxcCjG0MTkKq1KL+6uAJ9NBuT48l0lZrHoodrEK7HJ yBATAIhGBBARAgAGBQJJt2+7AAoJEGykGndDuNbIWVsAnjgyEhiDo5Mje4EbPoX7BYQlYq+5 AJ47SpquAYY6zLB6u2lmzQ8DaHbm4IhMBBMRAgAMBQJDlAzMBYMSuV6yAAoJEAgFz2XePm2T uMQAn1fWqSGo1EMJiglmWV+AQypVaz09AKCUH6rBS7sbPboBV2Xy+1I1oZdJMIhmBBMRAgAm BQJDgWi5AhsDBQkSzAMABgsJCAcDAgQVAggDBBYCAwECHgECF4AACgkQA8ACPgVBDpew7wCg 273GZJS2311rS3/3C8VJa8cM9LwAn3QzO5DFhKN/3XOGI99vxaK+x0zCtCFTaW1vbiBIb3Jt YW4gPGhvcm1zQHZlcmdlLm5ldC5hdT6IRgQQEQIABgUCQ4FthQAKCRDVI6bmYAYohM+7AJ4n 3bKIpEaejv/1pbHKLL11fse1DQCfXjFRojcLeRIXXkwvSWBDY/xpGvCIRgQQEQIABgUCQ4Fv jQAKCRAXBTkO5mybsAjoAJ41mgdVAz23U51NJ8cgpWp+KaWYWwCfdE1q/K/DNbx+Pix8kkOL NhQ2T6qIRgQQEQIABgUCQ4F6rwAKCRBT5ZlbUVUzCsoiAJ9GZNyA1XDcCdotS1qTFlp33tnA OQCfWYzBttAL7etuutb4CDJqPwOh4j+IRgQQEQIABgUCSELkGgAKCRD2jVf7quc0J3OXAJ4/ nzcUCOYJKNtjYZtPaqVj0cW7BgCfb/Trs4uvS3vooJizh0cJyPQqjymIRgQQEQIABgUCSbdM ggAKCRAY2KTi0O22TVM/AJ4yWpNFyqo67oYYOgr8OqQfMJnijACfbF0TqBE3xJYraCK3MIW5 Z1Yr+AuIRgQQEQIABgUCSbdvuwAKCRBspBp3Q7jWyEgjAJ98Zu4GfDiOylz+EDbm2T7P1BE7 kQCfbECHQARujttCnPxy2q3vXwL0yrWITAQTEQIADAUCQ5QMzAWDErlesgAKCRAIBc9l3j5t kwVzAJ4wywabgeuYCDMWZuGAsC2hDSFlFQCfQbdeCT0VoUveXfh3e58f8GJV4h6IZgQTEQIA JgUCQ4FofgIbAwUJEswDAAYLCQgHAwIEFQIIAwQWAgMBAh4BAheAAAoJEAPAAj4FQQ6XyuEA n3jEhRhdOW2sftDoYVN4yxxwihw6AKDgTV6czvp1mp1n1/3IPRNdzHXqwIhpBBMRAgApAhsD BQkSzAMABgsJCAcDAgQVAggDBBYCAwECHgECF4AFAkOBa6sCGQEACgkQA8ACPgVBDpeYsACg 6YLLgyAExRHb7/HoY9kHFsG1W+QAn3D/G7LJJgKv+Ak623nzyhhu/grVuQINBEOBaIoQCADP 7yaGkyu2a5A5clGb7sD6nDnKjz/rJrpFkluQ0Rwz73KxajjLzQeNGp2EV91UDRXbg1NCkf2E F97maJO00SYR7ZbQdyBKORgQZuLU/aSJn8UR15ChsuWxe874p/QGylzwEea/JVJUltud3Aep Dm8sB1nErPzz++iDZSFSdGqM5ltcv3geP0Ax+SDNqe7HWdmgv/EKaFgRUN62yS05V+HWylN+ wuj/SJJiKUhtiZQ26NiawQNDUcxUPgb8oYgGyZRL1GcGWs45RADiEUNSHifqm+CcRSkQFXex GFHDDnHKFFnyVHKaWrwG6Ty9TFlx7+jo8gwDyphBLV0nsTYQcJvjAAMFCACSMCA/aewrLvVo C63o90CKgftkpwt53lp/1vqBvRzuZlCTLQ5ijbA2Pn/9oqPfWUqeIObr2YCRlpwnw5jfOKah wknlujA9nAzruqA2xwkDp2jpyEOoh1meDhbeaPa8lx4A2sxYwfSMCDDZ3Jwm/c0lFdhmlUEA dm9tnXL024evFr5BJVmmgbQsHErSwfyI6CDWjVXbySO60j3K3GVIvTm55iB0rlsMjwhRD4Sy 5PO5aaCktmICqBtSDBHZjje7PWPKN92ZhHr24g11Xc3u42U1bQ+J9oNmuTJMI20NcR0lgJNR d8oQvqHyU7B5mRMBalCKNDdtVLbTuh2Cs6vrS6jFiE8EGBECAA8FAkOBaIoCGwwFCRLMAwAA CgkQA8ACPgVBDpfxKACeIfmJdm0wyb6FNyfP9/yYlSak1T8AoJjH/Pc+Uwq5T0kUEdcurSEm MZd1 =5NNR -----END PGP PUBLIC KEY BLOCK-----
运行以下命令来获取缺少的公钥...
gpg --import /home/key.asc
...并将密钥添加到密钥环...
apt-key add /root/.gnupg/pubring.gpg
...和问题..
apt-key update
... 然后...
apt-get update
回到教程 安装超猴子：
lb01 / lb02
apt-get install ultramonkey
dpkg-reconfigure ipvsadm
回答如下：
您要在启动时自动加载IPVS规则吗？
没有
选择一个守护进程方法。
没有
3.在负载平衡器上启用数据包转发
lb01 / lb02
pico /etc/sysctl.conf
取消注释以下行，以便负载平衡器能够路由流量：
# Uncomment the next line to enable packet forwarding for IPv4
net.ipv4.ip_forward=1
之后运行：
lb01 / lb02
sysctl -p
