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-rw-r--r--cloudinit/config/cc_apt_pipelining.py25
1 files changed, 25 insertions, 0 deletions
diff --git a/cloudinit/config/cc_apt_pipelining.py b/cloudinit/config/cc_apt_pipelining.py
index 40c32c84..ab9d0054 100644
--- a/cloudinit/config/cc_apt_pipelining.py
+++ b/cloudinit/config/cc_apt_pipelining.py
@@ -16,6 +16,31 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+Apt Pipelining
+--------------
+**Summary:** configure apt pipelining
+
+This module configures apt's ``Acquite::http::Pipeline-Depth`` option, whcih
+controls how apt handles HTTP pipelining. It may be useful for pipelining to be
+disabled, because some web servers, such as S3 do not pipeline properly (LP:
+#948461). The ``apt_pipelining`` config key may be set to ``false`` to disable
+pipelining altogether. This is the default behavior. If it is set to ``none``,
+``unchanged``, or ``os``, no change will be made to apt configuration and the
+default setting for the distro will be used. The pipeline depth can also be
+manually specified by setting ``apt_pipelining`` to a number. However, this is
+not recommended.
+
+**Internal name:** ``cc_apt_pipelining``
+
+**Module frequency:** per instance
+
+**Supported distros:** ubuntu, debian
+
+**Config keys**::
+ apt_pipelining: <false/none/unchanged/os/number>
+"""
+
from cloudinit.settings import PER_INSTANCE
from cloudinit import util