Please conside using curl in the installer for RHCL. In airgapped envs where you need to use proxy wget behave weird. There is a trick with making an alias for wget poining to curl but -O parameter generates remote name of downloaded file (4ex. epel.rpm becomes epel-xxxxx.rpm).
Workaround is to download epe-xxxx.rpm first and rename to epel.rpm in tmp.
In theory approach with wget should work as it should use http_proxy env variable (and normally it does) but not from galera-manager installer script.
Please conside using curl in the installer for RHCL. In airgapped envs where you need to use proxy wget behave weird. There is a trick with making an alias for wget poining to curl but -O parameter generates remote name of downloaded file (4ex. epel.rpm becomes epel-xxxxx.rpm). Workaround is to download epe-xxxx.rpm first and rename to epel.rpm in tmp. In theory approach with wget should work as it should use http_proxy env variable (and normally it does) but not from galera-manager installer script.