Checkmk Werk 15559: mk_oracle: Always use TNS_ALIAS when present

ID: 15559 Title: mk_oracle: Always use TNS_ALIAS when present Component: agents Level: 1 Class: Bug fix Version: 2.3.0b1 This werk may be relevant for you, in case: <ul> <li>you want to monitor remote instances</li> <li>you are using a TNS_ALIAS to reach the remote instance</li> </ul> Previously, a <tt>TNS_ALIAS</tt> from mk_oracle.cfg was pinged by the plugin with <tt>tnsping</tt> in order to verify that this alias can be reached. However, this needs the tool <tt>tnsping</tt> installed with the oracle client, which is not shipped per default. A failure led to silently ignoring the <tt>TNS_ALIAS</tt> and falling back to a potentially invalid connection string which is passed to <tt>sqlplus</tt>. The plugin now assumes that the given <tt>TNS_ALIAS</tt> can be reached and uses it.