Can't compile v 2.3.2 on Apline Linux 3.20

[MarcelloPercoco]

Hello,

i have some errors trying to compile keepalived 2.3.2 with alpine 3.20.
Any idea how to fix this?

/bin/bash ./configure --disable-dynamic-linking

Errors:

37.60 In file included from /usr/include/net/ethernet.h:10,
37.60 from vrrp.c:44:
37.60 /usr/include/netinet/if_ether.h:115:8: error: redefinition of 'struct ethhdr'
37.60 115 | struct ethhdr {
37.60 | ^~~~~~
37.60 In file included from vrrp.c:43:
37.60 /usr/include/linux/if_ether.h:173:8: note: originally defined here
37.60 173 | struct ethhdr {
37.60 | ^~~~~~

Packages installed:

bash
autoconf
curl
libgcc
libip4tc
libip6tc
gcc
ipset
ipset-dev
iptables
iptables-dev
libnfnetlink
libnfnetlink-dev
libnl3
libnl3-dev
make
musl-dev
openssl
openssl-dev

Thanks and best regards

[rmartin16]

This issue should be resolved now via f129c58 (via #2499).

However, even once I build from master branch now, I get a seg fault at runtime.

❯ docker run --rm -it keepalived
Keepalived[1]: Starting Keepalived v2.3.2 (11/08,2024), git commit v2.3.2-13-g48dbf3d0
Keepalived[1]: Running on Linux 6.9.3-76060903-generic #202405300957~1726766035~22.04~4092a0e SMP PREEMPT_DYNAMIC Thu S (built for Linux 6.6.0)
Keepalived[1]: Command line: '/usr/sbin/keepalived' '--dont-fork' '--log-console' '-f'
Keepalived[1]:               '/etc/keepalived/keepalived.conf'
Keepalived[1]: Configuration file /etc/keepalived/keepalived.conf
Keepalived[1]: NOTICE: setting config option max_auto_priority should result in better keepalived performance
Keepalived[1]: Starting VRRP child process, pid=7
Keepalived[1]: pid 7 exited due to segmentation fault (SIGSEGV).

I'm still trying to diagnose this...

[rmartin16]

Looks like some directories are assumed to already exist when they do not on Alpine.

Notably, these two:

/usr/share/iproute2/rt_addrprotos.d
/etc/iproute2/rt_addrprotos.d

Once these directories exist, keepalived no longer seg faults.

backtraces

/ # gdb /usr/sbin/keepalived /coredump/core-keepalived.10.ee22c551c350.1731169922 
GNU gdb (GDB) 14.2

Reading symbols from /usr/sbin/keepalived...
[New LWP 10]
Core was generated by `keepalived --dont-fork --log-console'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007768585b606b in closedir (dir=dir@entry=0x0) at src/dirent/closedir.c:8

warning: 8	src/dirent/closedir.c: No such file or directory
(gdb) bt full
#0  0x00007768585b606b in closedir (dir=dir@entry=0x0) at src/dirent/closedir.c:8
        ret = <optimized out>
#1  0x000057a0c3f1fe74 in initialise_list (l=l@entry=0x57a0c3f51a10 <rt_addrprotos>, file_name=file_name@entry=0x57a0c3f277c0 "rt_addrprotos", 
    default_list=default_list@entry=0x57a0c3f4ff40 <rtaddrproto_default>, max=max@entry=255) at rttables.c:416
        path = 0x77685805f050 "/usr/share/iproute2/rt_addrprotos.d"
        etc_path = 0x776858060590 ""
        statbuf = {st_dev = 0, st_ino = 0, st_nlink = 0, st_mode = 3287440415, st_uid = 22432, st_gid = 0, __pad0 = 0, st_rdev = 96347993382616, st_size = 65, st_blksize = 131290042909961, 
          st_blocks = 0, st_atim = {tv_sec = 206158430232, tv_nsec = 140734826375680}, st_mtim = {tv_sec = 140734826375488, tv_nsec = 140734826375696}, st_ctim = {tv_sec = 140734826375504, tv_nsec = 0}, 
          __unused = {-1, 0, 0}}
        ent = <optimized out>
        dir = 0x0
#2  0x000057a0c3f20100 in initialise_list (max=255, default_list=0x57a0c3f4ff40 <rtaddrproto_default>, file_name=0x57a0c3f277c0 "rt_addrprotos", l=0x57a0c3f51a10 <rt_addrprotos>) at rttables.c:458
        etc_path = <optimized out>
        statbuf = <optimized out>
        ent = <optimized out>
        dir = <optimized out>
        path = <optimized out>
        path = <optimized out>
        etc_path = <optimized out>
        statbuf = <optimized out>
        ent = <optimized out>
        dir = <optimized out>
#3  find_entry (name=name@entry=0x57a0c3f25c1f "keepalived", id=id@entry=0x7fff61556a14, l=l@entry=0x57a0c3f51a10 <rt_addrprotos>, file_name=file_name@entry=0x57a0c3f277c0 "rt_addrprotos", 
    default_list=default_list@entry=0x57a0c3f4ff40 <rtaddrproto_default>, max=max@entry=255) at rttables.c:453
        endptr = 0x57a0c3f25c1f "keepalived"
        l_id = <optimized out>
        rte = <optimized out>
#4  0x000057a0c3f205dd in find_rttables_addrproto (name=name@entry=0x57a0c3f25c1f "keepalived", id=id@entry=0x57a0c3f520d2 <address_protocol> "") at rttables.c:698
        val = 0
#5  0x000057a0c3efd69f in set_addrproto () at vrrp_ipaddress.c:854
No locals.
#6  0x000057a0c3ee038c in start_vrrp_child () at vrrp_daemon.c:1130
        pid = <optimized out>
        syslog_ident = <optimized out>
#7  0x000057a0c3eb71f3 in start_keepalived (thread=<optimized out>) at main.c:548
        have_child = false
#8  0x000057a0c3f16c2e in thread_call (thread=0x776858088a70) at scheduler.c:2078
--Type <RET> for more, q to quit, c to continue without paging--c
No locals.
#9  process_threads (m=0x776858088e70) at scheduler.c:2145
        thread = 0x776858088a70
        thread_list = <optimized out>
        thread_type = 7
        exit_code = <optimized out>
#10 0x000057a0c3f174e1 in launch_thread_scheduler (m=<optimized out>) at scheduler.c:2267
No locals.
#11 0x000057a0c3eb9232 in keepalived_main (argc=<optimized out>, argv=<optimized out>) at main.c:2869
        report_stopped = true
        uname_buf = {sysname = "Linux", '\000' <repeats 59 times>, nodename = "ee22c551c350", '\000' <repeats 52 times>, release = "6.9.3-76060903-generic", '\000' <repeats 42 times>, 
          version = "#202405300957~1726766035~22.04~4092a0e SMP PREEMPT_DYNAMIC Thu S", machine = "x86_64", '\000' <repeats 58 times>, domainname = "(none)", '\000' <repeats 58 times>}
        end = 0x7fff61556bed ""
        exit_code = 0
        magic = <optimized out>
        script_flags = <optimized out>
        usage = {ru_utime = {tv_sec = 0, tv_usec = 1731169174}, ru_stime = {tv_sec = 606637922, tv_usec = 0}, ru_maxrss = 0, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 0, ru_minflt = 0, ru_majflt = 0, 
          ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 0, ru_nvcsw = 0, ru_nivcsw = 0, __reserved = {0 <repeats 16 times>}}
        child_usage = {ru_utime = {tv_sec = 96347993806029, tv_usec = 1}, ru_stime = {tv_sec = 0, tv_usec = 102}, ru_maxrss = 96347993806143, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 80, 
          ru_minflt = 96347993824500, ru_majflt = 0, ru_nswap = 0, ru_inblock = 67, ru_oublock = 96347993806038, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 66, ru_nvcsw = 96347993826898, ru_nivcsw = 0, 
          __reserved = {0, 3, 96347993806045, 0, 0, 108, 96347993806057, 0, 0, 68, 96347993806068, 1, 0, 83, 96347993806081, 2}}
        name = <optimized out>
        end = <optimized out>
#12 0x00007768585b670a in libc_start_main_stage2 (main=0x57a0c3eb6080 <main>, argc=3, argv=0x7fff61557428) at src/env/__libc_start_main.c:95
        envp = 0x7fff61557448
#13 0x000057a0c3eb609b in _start ()
No symbol table info available.

/ # gdb /usr/sbin/keepalived /coredump/core-keepalived.108.ee22c551c350.1731170082 
GNU gdb (GDB) 14.2

Reading symbols from /usr/sbin/keepalived...
[New LWP 108]
Core was generated by `keepalived --dont-fork --log-console'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000731be928006b in closedir (dir=dir@entry=0x0) at src/dirent/closedir.c:8

warning: 8	src/dirent/closedir.c: No such file or directory
(gdb) bt full
#0  0x0000731be928006b in closedir (dir=dir@entry=0x0) at src/dirent/closedir.c:8
        ret = <optimized out>
#1  0x00005bbee67b1ef3 in initialise_list (l=l@entry=0x5bbee67e3a10 <rt_addrprotos>, file_name=file_name@entry=0x5bbee67b97c0 "rt_addrprotos", 
    default_list=default_list@entry=0x5bbee67e1f40 <rtaddrproto_default>, max=max@entry=255) at rttables.c:429
        path = 0x731be8d29050 "/etc/iproute2/rt_addrprotos.d"
        etc_path = 0x731be8d2a590 ""
        statbuf = {st_dev = 0, st_ino = 0, st_nlink = 0, st_mode = 3866852383, st_uid = 23486, st_gid = 0, __pad0 = 0, st_rdev = 100875468324568, st_size = 65, st_blksize = 126563713246473, 
          st_blocks = 0, st_atim = {tv_sec = 206158430232, tv_nsec = 140729481743296}, st_mtim = {tv_sec = 140729481743104, tv_nsec = 140729481743312}, st_ctim = {tv_sec = 140729481743120, tv_nsec = 0}, 
          __unused = {-1, 0, 0}}
        ent = <optimized out>
        dir = 0x0
#2  0x00005bbee67b2100 in initialise_list (max=255, default_list=0x5bbee67e1f40 <rtaddrproto_default>, file_name=0x5bbee67b97c0 "rt_addrprotos", l=0x5bbee67e3a10 <rt_addrprotos>) at rttables.c:458
        etc_path = <optimized out>
        statbuf = <optimized out>
        ent = <optimized out>
        dir = <optimized out>
        path = <optimized out>
        path = <optimized out>
        etc_path = <optimized out>
        statbuf = <optimized out>
        ent = <optimized out>
        dir = <optimized out>
#3  find_entry (name=name@entry=0x5bbee67b7c1f "keepalived", id=id@entry=0x7ffe22c4cbd4, l=l@entry=0x5bbee67e3a10 <rt_addrprotos>, file_name=file_name@entry=0x5bbee67b97c0 "rt_addrprotos", 
    default_list=default_list@entry=0x5bbee67e1f40 <rtaddrproto_default>, max=max@entry=255) at rttables.c:453
        endptr = 0x5bbee67b7c1f "keepalived"
        l_id = <optimized out>
        rte = <optimized out>
#4  0x00005bbee67b25dd in find_rttables_addrproto (name=name@entry=0x5bbee67b7c1f "keepalived", id=id@entry=0x5bbee67e40d2 <address_protocol> "") at rttables.c:698
        val = 0
#5  0x00005bbee678f69f in set_addrproto () at vrrp_ipaddress.c:854
No locals.
#6  0x00005bbee677238c in start_vrrp_child () at vrrp_daemon.c:1130
        pid = <optimized out>
        syslog_ident = <optimized out>
#7  0x00005bbee67491f3 in start_keepalived (thread=<optimized out>) at main.c:548
        have_child = false
#8  0x00005bbee67a8c2e in thread_call (thread=0x731be8d52a70) at scheduler.c:2078
--Type <RET> for more, q to quit, c to continue without paging--c
No locals.
#9  process_threads (m=0x731be8d52e70) at scheduler.c:2145
        thread = 0x731be8d52a70
        thread_list = <optimized out>
        thread_type = 7
        exit_code = <optimized out>
#10 0x00005bbee67a94e1 in launch_thread_scheduler (m=<optimized out>) at scheduler.c:2267
No locals.
#11 0x00005bbee674b232 in keepalived_main (argc=<optimized out>, argv=<optimized out>) at main.c:2869
        report_stopped = true
        uname_buf = {sysname = "Linux", '\000' <repeats 59 times>, nodename = "ee22c551c350", '\000' <repeats 52 times>, release = "6.9.3-76060903-generic", '\000' <repeats 42 times>, 
          version = "#202405300957~1726766035~22.04~4092a0e SMP PREEMPT_DYNAMIC Thu S", machine = "x86_64", '\000' <repeats 58 times>, domainname = "(none)", '\000' <repeats 58 times>}
        end = 0x7ffe22c4cdad ""
        exit_code = 0
        magic = <optimized out>
        script_flags = <optimized out>
        usage = {ru_utime = {tv_sec = 0, tv_usec = 1731169174}, ru_stime = {tv_sec = 606637922, tv_usec = 0}, ru_maxrss = 0, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 0, ru_minflt = 0, ru_majflt = 0, 
          ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 0, ru_nvcsw = 0, ru_nivcsw = 0, __reserved = {0 <repeats 16 times>}}
        child_usage = {ru_utime = {tv_sec = 100875468747981, tv_usec = 1}, ru_stime = {tv_sec = 0, tv_usec = 102}, ru_maxrss = 100875468748095, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 80, 
          ru_minflt = 100875468766452, ru_majflt = 0, ru_nswap = 0, ru_inblock = 67, ru_oublock = 100875468747990, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 66, ru_nvcsw = 100875468768850, 
          ru_nivcsw = 0, __reserved = {0, 3, 100875468747997, 0, 0, 108, 100875468748009, 0, 0, 68, 100875468748020, 1, 0, 83, 100875468748033, 2}}
        name = <optimized out>
        end = <optimized out>
#12 0x0000731be928070a in libc_start_main_stage2 (main=0x5bbee6748080 <main>, argc=3, argv=0x7ffe22c4d5e8) at src/env/__libc_start_main.c:95
        envp = 0x7ffe22c4d608
#13 0x00005bbee674809b in _start ()
No symbol table info available.

[rmartin16]

@MarcelloPercoco,

FWIW, this is what I'm updating so I can build the 2.3.2 release:

• Update vrrp.c to not include linux/if_ether.h
  • sed -i 's/#include <linux\/if_ether.h>//' keepalived/vrrp/vrrp.c
• Run ./configure with bash instead of sh
• Install linux-headers alongside the other necessary packages
• Ensure /usr/share/iproute2/rt_addrprotos.d and /etc/iproute2/rt_addrprotos.d directories exist

[MarcelloPercoco]

@rmartin16

Thanks, i will give it a try :)

[pqarmitage]

Commit f129c58 has already been mentioned - with musl headers you cannot include both <net/ethernet.h> and <linux/if_ether.h> since they both define struct ethhdr. With glibc <net/ethernet.h> includes <linux/if_ether.h> to obtain the definition of struct ethhdr, and there are the proper include guards to stop a duplicate definition.

Commit ada5254 resolves the configure issues and makes it work with busybox sh.

Commit 042dc49 fixes the segfault. I really don't know what I was thinking when I wrote that bit of code!

I will make some further changes to better handle no /etc/iproute2 or /usr/share/iproute2 directories, but the latest commit appears to work for now.

[MarcelloPercoco]

@rmartin16

Hi.

I've tried with your suggestion and can confirm that compile and works on alpine linux.

Thanks!