02-工程实践:cloudstack:troubleshooting

差别

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到此差别页面的链接

--- 02-工程实践:cloudstack:troubleshooting [2022/09/03 13:26] – [VLAN不足] annhe
+++ 02-工程实践:cloudstack:troubleshooting [2022/09/03 13:55] (当前版本) – annhe
@@ 行 5: / 行 5: @@
 - 家庭路由器，Shared网络下，模板的网卡是DHCP时，可以获取到IP地址，那么是谁负责分配的IP，即DHCP服务器是谁？是家里的路由器？还是CloudStack里的虚拟路由器？
 - DHCP分配的IP是否有变化的风险？是否需要设置为static？有什么手段可以设置为static？
+Q群回答：
+acs((大概是apache cloudstack缩写))本身就是dhcp的，通过mac固定了ip地址，除非你通过acs改变ip或者网内有其他dhcp服务器干扰，否则不会有问题
+参见：[stackoverflow](https://serverfault.com/questions/880900/can-i-request-a-specific-ip-address-via-dhcp-without-rejecting-an-offer-of-a-dif)，使用 [lease block](https://manpages.debian.org/bullseye/isc-dhcp-client/dhclient.conf.5.en.html#LEASE_DECLARATIONS)
+```
+fixed-address ip-address;
+The fixed-address statement is used to set the ip address of a particular lease. This is required for all lease statements. The IP address must be specified as a dotted quad (e.g., 12.34.56.78).
+```
+查看 cloudstack dhcp 的配置
+```
+# ps aux |grep client
+root       766  0.0  0.4 102904  2360 ?        Ss   05:15   0:00 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient--eth0.lease -pf /var/run/dhclient-eth0.pid -H vm-centos eth0
+# cat /var/lib/dhclient/dhclient--eth0.lease
+lease {
+  interface "eth0";
+  fixed-address 192.168.0.163;
+  option subnet-mask 255.255.255.0;
+  option dhcp-lease-time 86400;
+  option routers 192.168.0.1;
+  option dhcp-message-type 5;
+  option dhcp-server-identifier 192.168.0.1;
+  option domain-name-servers 192.168.0.1;
+  option dhcp-renewal-time 43200;
+  option dhcp-rebinding-time 75600;
+  renew 6 2022/09/03 15:33:00;
+  rebind 0 2022/09/04 00:58:59;
+  expire 0 2022/09/04 03:58:59;
+}
+lease {
+  interface "eth0";
+  fixed-address 192.168.0.163;
+  option subnet-mask 255.255.255.0;
+  option routers 192.168.0.1;
+  option dhcp-lease-time 86400;
+  option dhcp-message-type 5;
+  option domain-name-servers 192.168.0.1;
+  option dhcp-server-identifier 192.168.0.1;
+  option dhcp-renewal-time 43200;
+  option dhcp-rebinding-time 75600;
+  renew 6 2022/09/03 16:17:38;
+  rebind 0 2022/09/04 02:15:01;
+  expire 0 2022/09/04 05:15:01;
+}
+```
 ### VLAN不足

02-工程实践/cloudstack/troubleshooting.1662182782.txt.gz · 最后更改: 2022/09/03 13:26 由 annhe