Add script for setting up ssh

A frequent scenario is to 'refresh' ssh configuration toward the
end of:
-changing trust nodes
-Adding a collective member
-Repairing a broken configuration
-As part of 'confluent-ifying' a node that wasn't confluent deployed

misc/setupssh.sh

@@ -0,0 +1,32 @@
+[ -f /lib/confluent/functions ] && . /lib/confluent/functions
+[ -f /etc/confluent/functions ] && . /etc/confluent/functions
+[ -f /opt/confluent/bin/apiclient ] && confapiclient=/opt/confluent/bin/apiclient
+[ -f /etc/confluent/apiclient ] && confapiclient=/etc/confluent/apiclient
+nodename=$(grep ^NODENAME: /etc/confluent.info|awk '{print $NF}')
+for pubkey in /etc/ssh/ssh_host*key.pub; do
+    certfile=${pubkey/.pub/-cert.pub}
+    rm $certfile
+    confluentpython $confapiclient /confluent-api/self/sshcert $pubkey -o $certfile
+done
+TMPDIR=$(mktemp -d)
+cd $TMPDIR
+confluentpython $confapiclient /confluent-public/site/initramfs.tgz -o initramfs.tgz
+tar xf initramfs.tgz
+for ca in ssh/*.ca; do
+	LINE=$(cat $ca)
+	cp -af /etc/ssh/ssh_known_hosts /etc/ssh/ssh_known_hosts.new
+	grep -v "$LINE" /etc/ssh/ssh_known_hosts > /etc/ssh/ssh_known_hosts.new
+	echo '@cert-authority *' $LINE >> /etc/ssh/ssh_known_hosts.new
+	mv /etc/ssh/ssh_known_hosts.new /etc/ssh/ssh_known_hosts
+done
+for pubkey in ssh/*.*pubkey; do
+	LINE=$(cat $pubkey)
+	cp -af /root/.ssh/authorized_keys /root/.ssh/authorized_keys.new
+	grep -v "$LINE" /root/.ssh/authorized_keys > /root/.ssh/authorized_keys.new
+	echo "$LINE" >> /root/.ssh/authorized_keys.new
+	mv /root/.ssh/authorized_keys.new /root/.ssh/authorized_keys
+done
+confluentpython $confapiclient /confluent-api/self/nodelist | sed -e 's/^- //' > /etc/ssh/shosts.equiv
+cat /etc/ssh/shosts.equiv > /root/.shosts
+cd -
+rm -rf $TMPDIR