I am starting to use propellor and ran into a couple of issues that seems related to GPG keys handling. I followed install procedure, added a GPG key, and signed commits. Here is the output from a propellor execution: if ! cabal build; then cabal configure; cabal build; fi Building propellor-0.8.1... Preprocessing library propellor-0.8.1... In-place registering propellor-0.8.1... Preprocessing executable 'propellor' for propellor-0.8.1... Preprocessing executable 'propellor-config' for propellor-0.8.1... [46 of 46] Compiling Main ( src/config.hs, dist/build/propellor-config/propellor-config-tmp/Main.o ) Linking dist/build/propellor-config/propellor-config ... ln -sf dist/build/propellor-config/propellor-config propellor if ! cabal build; then cabal configure; cabal build; fi Building propellor-0.8.1... Preprocessing library propellor-0.8.1... In-place registering propellor-0.8.1... Preprocessing executable 'propellor' for propellor-0.8.1... Preprocessing executable 'propellor-config' for propellor-0.8.1... ln -sf dist/build/propellor-config/propellor-config propellor Propellor build ... done gpg: skipped "Arnaud Bailly ": No secret key gpg: signing failed: No secret key error: gpg failed to sign the data fatal: failed to write commit object Everything up-to-date From https://github.com/joeyh/propellor 9a31b95..8aabde7 joeyconfig -> origin/joeyconfig Git fetch ... done ** warning: git branch origin/master is not signed with a trusted gpg key; refusing to deploy it! (Running with previous configuration instead.) propellor: Cannot continue! ** error: Propellor does not know about host: 188.226.133.217 (Perhaps you should specify the real hostname on the command line?) (Or, edit propellor's config.hs to configure this host) Known hosts: mybox.example.com webserver.docker ** error: protocol error (perhaps the remote propellor failed to run?) propellor: user error (ssh ["-o","ControlPath=/Users/arnaud/.ssh/propellor/188.226.133.217.sock","-o","ControlMaster=auto","-o","ControlPersist=yes","root@188.226.133.217","sh -c 'if [ ! -d /usr/local/propellor ] ; then apt-get update && apt-get --no-install-recommends --no-upgrade -y install git make && echo STATUSNeedGitClone ; else cd /usr/local/propellor && if ! test -x ./propellor; then make deps build; fi && ./propellor --boot 188.226.133.217 ; fi'"] exited 1) I am puzzled...