Moved a server from the datacenter to our secure room. I've changed the DNS, and our dhcpd... and yet, every time it boots, it comes up with the IP it had in the datacenter.
Any idea where it could be caching the IP - maybe in the initramfs?
C 7, updated.
mark
On 29/07/2019 20:58, mark wrote:
Moved a server from the datacenter to our secure room. I've changed the DNS, and our dhcpd... and yet, every time it boots, it comes up with the IP it had in the datacenter.
Any idea where it could be caching the IP - maybe in the initramfs?
C 7, updated.
mark
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Don't shoot the messenger, but have you checked /etc/sysconfig/network-scripts/ifcfg-* ? For that matter, have you checked /var/lib/dhcpd/dhcpd.leases?
Regards,
Am 29.07.2019 um 22:37 schrieb J Martin Rushton via CentOS centos@centos.org:
On 29/07/2019 20:58, mark wrote:
Moved a server from the datacenter to our secure room. I've changed the DNS, and our dhcpd... and yet, every time it boots, it comes up with the IP it had in the datacenter.
Any idea where it could be caching the IP - maybe in the initramfs?
C 7, updated.
mark
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Don't shoot the messenger, but have you checked /etc/sysconfig/network-scripts/ifcfg-* ? For that matter, have you checked /var/lib/dhcpd/dhcpd.leases?
or fixed IP from DHCP server?
-- LF
Leon Fauster via CentOS wrote:
Am 29.07.2019 um 22:37 schrieb J Martin Rushton via CentOS centos@centos.org: On 29/07/2019 20:58, mark wrote:
Moved a server from the datacenter to our secure room. I've changed the DNS, and our dhcpd... and yet, every time it boots, it comes up with the IP it had in the datacenter.
Any idea where it could be caching the IP - maybe in the initramfs? C 7, updated.
Don't shoot the messenger, but have you checked /etc/sysconfig/network-scripts/ifcfg-* ? For that matter, have you checked /var/lib/dhcpd/dhcpd.leases?
or fixed IP from DHCP server?
Yep. ifcfg-em1 is set to dhcp.
A bit more info: we're encrypted, and when it reboots, it can't find the tang server (using clevis/tang), so it hangs, and if I let it drop me to the emergency shell, I see the old IP address.
I've been looking at this, and what's gotten really weird is that if I do a host tang on the server, it gives *two* different IPs... one of which has not been a dhcpd or tang server since last year. And tang<fqdn> is not in the organization DNS. So I'm sitting here, trying to figure out where it's getting both IPs from. Our dhcpd server knows the correct tang server.
And the /etc/hosts on the server consists of 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
so it's not the hosts file.
mark As I said, used the organizational lookup, and it doesn't find tang.
On Mon, 29 Jul 2019 at 16:50, mark m.roth@5-cent.us wrote:
Leon Fauster via CentOS wrote:
Am 29.07.2019 um 22:37 schrieb J Martin Rushton via CentOS centos@centos.org: On 29/07/2019 20:58, mark wrote:
Moved a server from the datacenter to our secure room. I've changed the DNS, and our dhcpd... and yet, every time it boots, it comes up with the IP it had in the datacenter.
Any idea where it could be caching the IP - maybe in the initramfs? C 7, updated.
Don't shoot the messenger, but have you checked /etc/sysconfig/network-scripts/ifcfg-* ? For that matter, have you checked /var/lib/dhcpd/dhcpd.leases?
or fixed IP from DHCP server?
Yep. ifcfg-em1 is set to dhcp.
A bit more info: we're encrypted, and when it reboots, it can't find the tang server (using clevis/tang), so it hangs, and if I let it drop me to the emergency shell, I see the old IP address.
I know this one! The problem is that encrypted servers initrd.img have the ip addresses set in them. I am not sure why it happens.. but it does.. I had to manually edit the initrd.img and find all the places where the old ip addresses were mentioned to make it work. You can't just make a new initrd because it copies these configs over from the previous one. Pain in the #@!$% @$$.
I've been looking at this, and what's gotten really weird is that if I do a host tang on the server, it gives *two* different IPs... one of which has not been a dhcpd or tang server since last year. And tang<fqdn> is not in the organization DNS. So I'm sitting here, trying to figure out where it's getting both IPs from. Our dhcpd server knows the correct tang server.
And the /etc/hosts on the server consists of 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
so it's not the hosts file.
markAs I said, used the organizational lookup, and it doesn't find tang.
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