I want to update a dyndns service by doing curl only when the DHCP lease is renewed with new IP. I came across dhcpcd exit-hook to call the script on renew, but the dhcpcd is creating a new secondary IP lease every time. This also causes a new route addition and it fails the lan routing of another service, which works fine if there is only one IP without dhcpcd.
I also tried disabling Network manager before enabling dhcpcd service but the same issue.
If there are any other alternatives to dhcpcd exit hook for this trigger, I am happy to try. Thanks
ip addr 2: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether dc:1b:xx:xx:xx brd ff:ff:ff:ff:ff:ff inet 10.194.126.133/19 brd 10.194.127.255 scope global dynamic noprefixroute wlan0 valid_lft 21924sec preferred_lft 21924sec inet 10.194.123.85/19 brd 10.194.127.255 scope global secondary dynamic noprefixroute wlan0 valid_lft 23386sec preferred_lft 20459sec
systemctl status firstname.lastname@example.org ● email@example.com - dhcpcd on wlan0 Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; enabled; vendor preset: disabled) Drop-In: /etc/systemd/system/dhcpcd@.service.d └─no-wait.conf Active: active (running) since Tue 2022-03-22; 24s ago Process: 17032 ExecStart=/usr/bin/dhcpcd -b -q wlan0 (code=exited, status=0/SUCCESS) Main PID: 17034 (dhcpcd) Tasks: 7 (limit: 9309) Memory: 2.1M CPU: 62ms CGroup: /firstname.lastname@example.org ├─17034 "dhcpcd: wlan0 [ip4] [ip6]" ├─17035 "dhcpcd: [privileged proxy] wlan0 [ip4] [ip6]" ├─17036 "dhcpcd: [network proxy] wlan0 [ip4] [ip6]" ├─17037 "dhcpcd: [control proxy] wlan0 [ip4] [ip6]" ├─17038 "dhcpcd: [network proxy] fe80::c77f::" ├─17043 "dhcpcd: [BPF ARP] wlan0 10.194.123.85" └─17064 "dhcpcd: [network proxy] 10.194.123.85" Mar 22 11:57:02 ceph systemd: Started dhcpcd on wlan0. Mar 22 11:57:02 ceph dhcpcd: wlan0: connected to Access Point: some_wifi Mar 22 ceph dhcpcd: wlan0: IAID xx:xx:xx:xx Mar 22 ceph dhcpcd: wlan0: soliciting an IPv6 router Mar 22 ceph dhcpcd: wlan0: rebinding lease of 10.194.123.85 Mar 22 ceph dhcpcd: wlan0: probing address 10.194.123.85/19 Mar 22 ceph dhcpcd: wlan0: leased 10.194.123.85 for 23414 seconds Mar 22 ceph dhcpcd: wlan0: adding route to 10.194.96.0/19 Mar 22 ceph dhcpcd: wlan0: adding default route via 10.194.96.1
inxi System: Kernel: 5.16.15-zen1-1-zen x86_64 bits: 64 compiler: gcc v: 11.2.0 Desktop: KDE Plasma 5.24.3 Distro: EndeavourOS base: Arch Linux Machine: Type: Laptop System: ASUSTeK product: VivoBook_ASUSLaptop X412FAC_X412FA v: 1.0 serial: <superuser required> Mobo: ASUSTeK model: X412FAC v: 1.0 serial: <superuser required> UEFI: American Megatrends v: X412FAC.303 date: 07/17/2020 Network: Device-1: Intel Comet Lake PCH-LP CNVi WiFi driver: iwlwifi v: kernel bus-ID: 00:14.3 IF: wlan0 state: up mac: <filter> IF-ID-1: docker0 state: down mac: <filter>