[TASK] add KnownHosts reference to .ssh/config and empty known_hosts

Author: Matthias Walter

.ssh/config

@@ -3,21 +3,25 @@ Host web01
     User admin
     Hostname __ADD_HOSTNAME__
     IdentityFile ~/.ssh/__ADD_NAMESPACE__/id_rsa
+    UserKnownHostsFile .ssh/known_hosts
 
 # admin01
 Host admin01
     User admin
     Hostname __ADD_HOSTNAME__
     IdentityFile ~/.ssh/__ADD_NAMESPACE__/id_rsa
+    UserKnownHostsFile .ssh/known_hosts
 
 # db01
 Host db01
     User admin
     Hostname __ADD_HOSTNAME__
     IdentityFile ~/.ssh/__ADD_NAMESPACE__/id_rsa
+    UserKnownHostsFile .ssh/known_hosts
 
 # staging
 Host staging
     User admin
     Hostname __ADD_HOSTNAME__
     IdentityFile ~/.ssh/__ADD_NAMESPACE__/id_rsa
+    UserKnownHostsFile .ssh/known_hosts

.ssh/known_hosts

@@ -0,0 +1 @@
+# Add Known Hosts