Installation: Update section about installing RPM packages

Registering with the package repository using the
`crate-release-7.0-1.x86_64.rpm` packages and friends is being
deprecated.

It is advised to configure the RPM repository manually instead.

docs/install/redhat.rst

@@ -28,11 +28,27 @@ from the CrateDB package repository::
     # Import the public GPG key for verifying the package signatures.
     sudo rpm --import https://cdn.crate.io/downloads/yum/RPM-GPG-KEY-crate
 
-    # Register with the CrateDB package repository.
-    sudo rpm -Uvh https://cdn.crate.io/downloads/yum/7/x86_64/crate-release-7.0-1.x86_64.rpm
-
-The command above will install the ``/etc/yum.repos.d/crate.repo`` package
-repository configuration file.
+To register with the CrateDB package repository, create a file called ``cratedb.repo``
+in the ``/etc/yum.repos.d/`` directory for RedHat based distributions, or in the
+``/etc/zypp/repos.d/`` directory for OpenSuSE based distributions, containing::
+
+    [cratedb-stable]
+    name=CrateDB RPM package repository - $basearch - Stable
+    baseurl=https://cdn.crate.io/downloads/yum/7/$basearch
+    enabled=1
+    gpgcheck=1
+    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-crate
+    autorefresh=1
+    type=rpm-md
+
+    [cratedb-testing]
+    name=CrateDB RPM package repository - $basearch - Testing
+    baseurl=https://cdn.crate.io/downloads/yum/testing/7/$basearch
+    enabled=0
+    gpgcheck=1
+    gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-crate
+    autorefresh=1
+    type=rpm-md
 
 .. NOTE::
 
@@ -41,8 +57,8 @@ repository configuration file.
 
     By default, yum_ (Red Hat's package manager) will use the stable
     repository. This is because the testing repository is disabled.
-    If you would like to enable the testing repository, edit the ``crate.repo``
-    file and set ``enabled=1`` within the ``[crate-testing]`` section.
+    If you would like to enable the testing repository, edit the ``cratedb.repo``
+    file and set ``enabled=1`` within the ``[cratedb-testing]`` section.
 
 
 Install CrateDB