Merge "Add oat-client element"

elements/oat-client/README.rst

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+==========
+oat-client
+==========
+This element installs oat-client on the image, that's necessary for
+trusted boot feature in Ironic to work.
+
+Intel TXT will measure BIOS, Option Rom and Kernel/Ramdisk during trusted
+boot, the oat-client will securely fetch the hash values from TPM.
+
+.. note::
+    This element only works on Fedora.
+
+Put `fedora-oat.repo` into `/etc/yum.repos.d/`::
+
+  export DIB_YUM_REPO_CONF=/etc/yum.repos.d/fedora-oat.repo
+
+.. note::
+    OAT Repo is lack of a GPG signature check on packages, which can be
+    tracked on: https://github.com/OpenAttestation/OpenAttestation/issues/26

elements/oat-client/element-deps

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+package-installs

elements/oat-client/package-installs.yaml

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+oat-client:
+oat-commandtool:

elements/oat-client/yum.repos.d/fedora-oat.repo

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+# Place this file in your /etc/yum.repos.d/ directory
+
+[oat]
+name=oat 2.2 packages and dependencies
+baseurl=http://repos.fedorapeople.org/repos/gwei3/oat/fedora-$releasever/$basearch/
+enabled=1
+skip_if_unavailable=1
+gpgcheck=0