[BUG] Cuirass seems stuck in a loop.

[BUG] Cuirass seems stuck in a loop.

[Pierre-Henry Fröhring]

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Hello Guix!

I've a strange behaviour using Cuirass.

* Symptoms

#+begin_example
$ cat /var/log/cuirass.log 
…
2022-02-22T16:18:17 Fetching channels for spec 'flat'.                                                                                                                                        
2022-02-22T16:18:18 next evaluation in 60 seconds                                                                                                                                             
2022-02-22T16:18:26 error: build succeeded: '/gnu/store/rrp2yqlff0b6mz7frwdghclxb7qhqr2n-texlive-psnfss-59745-checkout.drv'                                                                   
2022-02-22T16:18:26 error: build started: '/gnu/store/gqc8jcd6vwh6gd64xfjiisjn5jzynvvv-texlive-ruhyphen-59745-checkout.drv'                                                                   
2022-02-22T16:18:26 error: build succeeded: '/gnu/store/gqc8jcd6vwh6gd64xfjiisjn5jzynvvv-texlive-ruhyphen-59745-checkout.drv'                                                                 
2022-02-22T16:18:27 error: build started: '/gnu/store/v8596k4spyd6j71zb1vsw3bbvpn232r4-texlive-scripts-59745-checkout.drv'                                                                    
2022-02-22T16:18:27 error: build succeeded: '/gnu/store/v8596k4spyd6j71zb1vsw3bbvpn232r4-texlive-scripts-59745-checkout.drv'                 
…
#+end_example


* Guix describe

#+begin_example
# guix describe
Generation 2  Feb 22 2022 14:58:35  (current)
  guix 218400c
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 218400c0f7d754467eac20bbdea3c5282efe7b2e
#+end_example


* Operating system

#+begin_example
(use-modules (gnu)
             (gnu services web)
             (gnu services rsync)
             (gnu services avahi)
       (gnu services cuirass)
       (gnu packages certs)
             (gnu packages rsync))
(use-service-modules networking ssh)
(use-package-modules screen ssh)


(define %nftables-ruleset
  (plain-file "nftables.conf"
              "# A simple and safe firewall
table inet filter {
  chain input {
    type filter hook input priority 0; policy drop;

    # early drop of invalid connections
    ct state invalid drop

    # allow established/related connections
    ct state { established, related } accept

    # allow from loopback
    iifname lo accept

    # allow icmp
    ip protocol icmp accept
    ip6 nexthdr icmpv6 accept

    # allow ssh and http
    tcp dport {ssh, https, http, rsync} accept

    # reject everything else
    reject with icmpx type port-unreachable
  }
  chain forward {
    type filter hook forward priority 0; policy drop;
  }
  chain output {
    type filter hook output priority 0; policy accept;
  }
}
"))


(operating-system
 (host-name "guixsd-1")

 (timezone "Europe/Paris")

 (locale "en_US.UTF-8")

 (bootloader (bootloader-configuration
              (bootloader grub-bootloader)
              (target "/dev/vda")))

 (file-systems (cons (file-system
                      (device "/dev/vda1")
                      (mount-point "/")
                      (type "ext4"))
                     %base-file-systems))

 (users (cons (user-account
               (name "phf")
               (group "users")
               (supplementary-groups '("wheel"))
               (home-directory "/home/phf"))
              %base-user-accounts))

 (packages (cons*

            ;; rsync is installed system wide.
            ;;
            ;;;; When connecting non-interactively over SSH, Guix will
            ;;;; source /etc/profile. It will not source your users's
            ;;;; own profile, but only the system profile.
            ;;;; see: https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/system/shadow.scm?id=1684ed6537fbd91ae5c14fb0314564e71799d390#n136
            rsync
            nss-certs
            screen
            openssh
            %base-packages))

 ;; Set your Droplet, static network configuration
 (services
  (append
   (list ;; Static address
    (service static-networking-service-type
             (list (static-networking
                    (addresses
                     (list (network-address
                            (device "eth0")
                            ;; ip a
                            (value "134.209.246.249/20"))))
                    (routes
                     (list (network-route
                            (destination "default")
                            ;; ip r
                            (gateway "134.209.240.1"))))
                    (name-servers '("8.8.8.8" "8.8.4.4")))))

    ;; SSH
    ;; ( … )

    ;; Cuirass
    (service cuirass-service-type
         (cuirass-configuration
          (specifications #~'())
          (host "0.0.0.0")))

    ;; Avahi
    (service avahi-service-type
         (avahi-configuration))

    ;; Cuirass publish
    (service guix-publish-service-type
         (guix-publish-configuration
          (host "0.0.0.0")
          (advertise? #t)))

    ;; Firewall
    (service nftables-service-type
             (nftables-configuration
              (ruleset %nftables-ruleset)))

    ;; Rsync
    (service rsync-service-type))

   %base-services)))
#+end_example


* Cuirass

Cuirass has been configured through the web interface but the
configuration should be equivalent to:

#+begin_example
(service cuirass-service-type
         (cuirass-configuration
          (specifications
           #~(list
              (specification
               (name "flat")
               (build '(channels flat))
               (channels
                (cons (channel
                       (name 'flat)
                       (url "https://github.com/flatwhatson/guix-channel"))
                      %default-channels)))))
          (host "0.0.0.0")))
#+end_example

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