diff --git a/roles/oracle-db-preinstall/tasks/os_configuration.yml b/roles/oracle-db-preinstall/tasks/os_configuration.yml
index 3461e1f..f0e93e7 100644
--- a/roles/oracle-db-preinstall/tasks/os_configuration.yml
+++ b/roles/oracle-db-preinstall/tasks/os_configuration.yml
@@ -13,6 +13,14 @@
     service: name=chronyd  state=started  enabled=yes
     ignore_errors: true
 
+  # ---------------------------------------------------
+  # Activation du nscd : Name Service Cache Daemon pour palier aux
+  # problèmes de perte de DNS
+  # ---------------------------------------------------
+  - name: activate nscd
+    service: name=nscd  state=started  enabled=yes
+    ignore_errors: true
+
   # --------------------------------------------------- 
   # configuration Linux : Selinux
   # ---------------------------------------------------
diff --git a/roles/oracle-db-preinstall/vars/RedHat_8.yml b/roles/oracle-db-preinstall/vars/RedHat_8.yml
index cf91beb..e90a707 100644
--- a/roles/oracle-db-preinstall/vars/RedHat_8.yml
+++ b/roles/oracle-db-preinstall/vars/RedHat_8.yml
@@ -12,6 +12,7 @@
    - bind-utils
    - binutils
    - chrony
+   - compat-libcap1
    - elfutils-libelf
    - elfutils-libelf-devel
    - fontconfig-devel
@@ -27,9 +28,12 @@
    - keyutils
    - ksh
    - libaio
+   - libaio.i686
    - libaio-devel
+   - libaio-devel.i686
    - libdmx
    - libgcc
+   - libgcc.i686
    - libibverbs
    - libICE
    - libmaxminddb
@@ -37,8 +41,10 @@
    - libpkgconf
    - librdmacm
    - libSM
+   - libstdc++.i686
    - libstdc++
    - libstdc++-devel
+   - libstdc++-devel.i686
    - libverto-libevent
    - libX11
    - libX11-common
@@ -49,12 +55,14 @@
    - libxcrypt-devel
    - libXext
    - libXi
+   - libXi.i686
    - libXinerama
    - libXmu
    - libXrandr
    - libXrender
    - libXt
    - libXtst
+   - libXtst.i686
    - libXv
    - libXxf86dga
    - libXxf86misc