HAProxy gives warnings about generated config

[ema-pe]

The /etc/haproxy/haproxy.cfg configuration file generated by the DFaaS agent contains some warnings that are issued when HAProxy is started or reloaded:

An example of the generated configuration

# HAProxy configuration file updated on 2024-11-20 14:56:00.031319314 +0000 UTC m=+88144.203715452

global
    stats socket /run/haproxy/admin.sock mode 666 level admin
    log stdout local0

defaults
    mode http

    log global
    option httplog

    timeout connect 5000
    timeout client 50000
    timeout server 50000

backend st_users_func_figlet
    stick-table type integer size 10 expire 1m0s store http_req_cnt,http_req_rate(1s)
backend st_users_func_ocr
    stick-table type integer size 10 expire 1m0s store http_req_cnt,http_req_rate(1s)
backend st_users_func_shasum
    stick-table type integer size 10 expire 1m0s store http_req_cnt,http_req_rate(1s)


frontend fe_main
    bind *:80

    stats enable
    stats auth admin:admin
    stats uri /haproxy?stats

    
    acl is_hdr_nodeID_known always_false
    
    

    http-request set-var(req.hdrcnt_nodeid) hdr_cnt(DFaaS-Node-ID)
    acl has_nodeid_hdr var(req.hdrcnt_nodeid),add(0) gt 0
    http-request capture str(hdrID:),concat(,req.hdrcnt_nodeid,) len 10

    acl is_path_root path /
    acl is_path_healthz path /healthz
    acl is_path_haproxy path_beg /haproxy
    acl is_path_system_funcs path /system/functions
    acl is_path_function path_beg /function/

    acl is_func_figlet path_beg /function/figlet
    acl is_func_ocr path_beg /function/ocr
    acl is_func_shasum path_beg /function/shasum
    
    
    http-request capture req.hdr(Host) len 50
    http-request capture req.hdr(DFaaS-Node-ID) len 50

    http-request deny unless is_path_root or is_path_healthz or is_path_haproxy or is_path_system_funcs or is_path_function

    http-request deny deny_status 403 if has_nodeid_hdr !is_hdr_nodeID_known
    
    use_backend be_ok if is_path_root
    use_backend be_healthz if is_path_healthz
    use_backend be_system_funcs if is_path_system_funcs
    use_backend be_myself if is_func_figlet has_nodeid_hdr
    use_backend be_figlet if is_func_figlet !has_nodeid_hdr
    use_backend be_myself if is_func_ocr has_nodeid_hdr
    use_backend be_ocr if is_func_ocr !has_nodeid_hdr
    use_backend be_myself if is_func_shasum has_nodeid_hdr
    use_backend be_shasum if is_func_shasum !has_nodeid_hdr
    

    http-request track-sc1 dst_port table st_users_func_figlet if is_func_figlet !has_nodeid_hdr
    http-request track-sc1 dst_port table st_users_func_ocr if is_func_ocr !has_nodeid_hdr
    http-request track-sc1 dst_port table st_users_func_shasum if is_func_shasum !has_nodeid_hdr
    

backend be_ok
    http-request return status 200 content-type "text/plain" string "This is a DFaaS node. Call a function with /function/<funcname>\n"

backend be_healthz
    option httpchk GET /healthz
    option http-server-close
    server healthz 127.0.0.1:8008 check

backend be_system_funcs
    option httpchk GET /
    option http-server-close
    server system_funcs 127.0.0.1:8080 check

backend be_myself
    option httpchk GET /healthz
    option forwardfor
    option http-server-close

    http-request add-header DFaaS-Node-ID QmdGb15XywKtG6BdjA3etoUYcfNh5U49bTbtSFnBpswhUn

    http-response set-header X-Server %s

    server 127.0.0.1 127.0.0.1:8080 check

backend be_figlet
    balance roundrobin

    option httpchk GET /healthz
    option forwardfor
    option http-server-close

    http-request add-header DFaaS-Node-ID QmdGb15XywKtG6BdjA3etoUYcfNh5U49bTbtSFnBpswhUn

    http-response set-header X-Server %s

    server 127.0.0.1 127.0.0.1:8080 weight 100 check
    
backend be_ocr
    balance roundrobin

    option httpchk GET /healthz
    option forwardfor
    option http-server-close

    http-request add-header DFaaS-Node-ID QmdGb15XywKtG6BdjA3etoUYcfNh5U49bTbtSFnBpswhUn

    http-response set-header X-Server %s

    server 127.0.0.1 127.0.0.1:8080 weight 100 check
    
backend be_shasum
    balance roundrobin

    option httpchk GET /healthz
    option forwardfor
    option http-server-close

    http-request add-header DFaaS-Node-ID QmdGb15XywKtG6BdjA3etoUYcfNh5U49bTbtSFnBpswhUn

    http-response set-header X-Server %s

    server 127.0.0.1 127.0.0.1:8080 weight 100 check

Reported warnings:

$ haproxy -Ws -f /etc/haproxy/haproxy.cfg -c
[NOTICE]   (66819) : haproxy version is 2.8.5-1ubuntu3.1
[NOTICE]   (66819) : path to executable is /usr/sbin/haproxy
[WARNING]  (66819) : config : unexpected character '0' after the timer value '1m0s', only (us=microseconds,ms=milliseconds,s=seconds,m=minutes,h=hours,d=days) are supported. This will be reported as an error in next versions.
[WARNING]  (66819) : config : unexpected character '0' after the timer value '1m0s', only (us=microseconds,ms=milliseconds,s=seconds,m=minutes,h=hours,d=days) are supported. This will be reported as an error in next versions.
[WARNING]  (66819) : config : unexpected character '0' after the timer value '1m0s', only (us=microseconds,ms=milliseconds,s=seconds,m=minutes,h=hours,d=days) are supported. This will be reported as an error in next versions.
[WARNING]  (66819) : config : parsing [/etc/haproxy/haproxy.cfg:70] : a 'http-request' rule placed after a 'use_backend' rule will still be processed before.
[WARNING]  (66819) : config : parsing [/etc/haproxy/haproxy.cfg:71] : a 'http-request' rule placed after a 'use_backend' rule will still be processed before.
[WARNING]  (66819) : config : parsing [/etc/haproxy/haproxy.cfg:72] : a 'http-request' rule placed after a 'use_backend' rule will still be processed before.
Warnings were found.
Configuration file is valid