nixcfg/sshtool

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#!/usr/bin/env bash
cd $(dirname $0)
CMDFILE="$1"
shift 1
CLUSTER="$1"
if [ -z "$CLUSTER" ] || [ ! -d "cluster/$CLUSTER" ]; then
echo "Usage: $CMDFILE <cluster name>"
echo "The cluster name must be the name of a subdirectory of cluster/"
exit 1
fi
shift 1
if [ -z "$1" ]; then
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NIXHOSTLIST=$(ls cluster/$CLUSTER/node | grep '\.nix$' | grep -v '\.site\.')
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else
NIXHOSTLIST="$@"
fi
if [ -z "$ROOT_PASS" ]; then
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read -s -p "Enter remote sudo password: " ROOT_PASS
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echo
fi
SSH_CONFIG=cluster/$CLUSTER/ssh_config
function header {
cat <<EOF
export DEPLOYTOOL_ROOT_PASSWORD=$ROOT_PASS
cat > /tmp/deploytool_askpass <<EOG
#!/usr/bin/env sh
echo \$DEPLOYTOOL_ROOT_PASSWORD
EOG
chmod +x /tmp/deploytool_askpass
export SUDO_ASKPASS=/tmp/deploytool_askpass
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sudo -A sh - <<'EOEVERYTHING'
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EOF
}
function footer {
echo EOEVERYTHING
echo rm /tmp/deploytool_askpass
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}
function message {
echo "echo '$@'"
}
function cmd {
echo "echo '- run $@'"
echo "$@"
}
function set_env {
echo "echo '- set $@'"
echo "export $@"
}
function copy {
local FROM=$1
local TO=$2
cat <<EOF
echo '- write $TO from $FROM'
base64 -d <<EOG | tee $TO > /dev/null
$(base64 <$FROM)
EOG
EOF
}
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function copy_secret {
local FROM=$1
local TO=$2
cat <<EOF
echo '- write secret $TO from $FROM'
base64 -d <<EOG | tee $TO > /dev/null
$(base64 <$FROM)
EOG
chown root:root $TO
chmod 0600 $TO
EOF
}
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function write_pass {
local PASSKEY=$1
local TO=$2
cat <<EOF
echo '- write secret $TO from pass $PASSKEY'
base64 -d <<EOG | tee $TO > /dev/null
$(pass $PASSKEY | base64)
EOG
chown root:root $TO
chmod 0600 $TO
EOF
}
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for NIXHOST in $NIXHOSTLIST; do
NIXHOST=${NIXHOST%.*}
if [ -z "$SSH_USER" ]; then
SSH_DEST=$NIXHOST
else
SSH_DEST=$SSH_USER@$NIXHOST
fi
echo "==== DOING $NIXHOST ===="
(header; . $CMDFILE; footer) | ssh -F $SSH_CONFIG $SSH_DEST sh -
done