Can't check signature: public key not found

[Arenhardt]

Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: Downloading https://github.com/wayneeseguin/rvm/archive/1.26.11.tar.gz
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: Downloading https://github.com/wayneeseguin/rvm/releases/download/1.26.11/1.26.11.tar.gz.asc
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: gpg: Signature made Mon 30 Mar 2015 09:52:13 PM UTC using RSA key ID BF04FF17
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: gpg: Can't check signature: public key not found
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: Warning, RVM 1.26.0 introduces signed releases and automated check of signatures when GPG software found.
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: Assuming you trust Michal Papis import the mpapis public key (downloading the signatures).
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: GPG signature verification failed for '/usr/local/rvm/archives/rvm-1.26.11.tgz' - 'https://github.com/wayneeseguin/rvm/releases/download/1.26.11/1.26.11.tar.gz.asc'!
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: try downloading the signatures:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: or if it fails:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: command curl -sSL https://rvm.io/mpapis.asc | gpg --import -
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: the key can be compared with:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns:
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: https://rvm.io/mpapis.asc
Notice: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: https://keybase.io/mpapis
Error: bash -c '/usr/bin/curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer -o /tmp/rvm-installer && chmod +x /tmp/rvm-installer && rvm_bin_path=/usr/local/rvm/bin rvm_man_path=/usr/local/rvm/man /tmp/rvm-installer --version latest && rm /tmp/rvm-installer' returned 2 instead of one of [0]
Error: /Stage[rvm-install]/Rvm::System/Exec[system-rvm]/returns: change from notrun to 0 failed: bash -c '/usr/bin/curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer -o /tmp/rvm-installer && chmod +x /tmp/rvm-installer && rvm_bin_path=/usr/local/rvm/bin rvm_man_path=/usr/local/rvm/man /tmp/rvm-installer --version latest && rm /tmp/rvm-installer' returned 2 instead of one of [0]

[Benjaminxreid]

while this is a bit old and you probably already solved it;
you need to install the dependency to fix this issue: golja/gnupg (>=1.2.0)