Octavia api fails to start because libpython2.7 is missing

[Speedmann]

Using openstack-ansible 18.1.0 on Ubuntu 16.04

octavia-api refuses to start because

`Jan 15 12:56:28 ctr002-octavia-server-container-6b38d84c uwsgi[145]: /openstack/venvs/octavia-18.1.0/bin/uwsgi: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory`

Installing libpython2.7 fixes this issue.

We are using lxc containers for this deployment.

I hope i got every information you need, if not feel free to ask for more details

[Georgina Shippey (gshippey)]

I've tried to reproduce this error using AIO on a ubuntu 16.04 on a vagrant machine and have been unable to reproduce it. Libpython exists within my containers base image and seems to be installed without fault. Octavia seems to run fine. If you have any other info to help reproduce please let me know.
I was looking at /var/lib/machines/ubuntu-xenial-amd64/var/log/apt/history.log on the host for libpython2.7 and checked it was installed through dpkg -l libpython* on the octavia container.

[Jonathan Rosser (jrosser)]

Marking this as incomplete - we need further verification in the originial environment that libpython was missing in the container base image, and therefore also missing in the octavia container.

[Speedmann (speedmann)]

i can indeed see, in the apt log file you reference that there was an installation for libpython2.7

```
Install: libmpc3:amd64 (1.0.3-1, automatic), libxdmcp6:amd64 (1:1.1.2-1.1, automatic), manpages:amd64 (4.04-2, automatic), libmpx0:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), python2.7-dev:amd64 (2.7.12-1ubuntu0~16.04.3, automatic), libgcc-5-dev:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), iptables:amd64 (1.6.0-2ubuntu3), linux-libc-dev:amd64 (4.4.0-116.140, automatic), libmpfr4:amd64 (3.1.4-1, automatic), openssl:amd64 (1.0.2g-1ubuntu4.10, automatic), libfakeroot:amd64 (1.20.2-1ubuntu1, automatic), libc6-dev:amd64 (2.23-0ubuntu10, automatic), rename:amd64 (0.20-4, automatic), git-man:amd64 (1:2.7.4-0ubuntu1.3, automatic), libexpat1-dev:amd64 (2.1.0-7ubuntu0.16.04.3, automatic), cpp-5:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), python2.7-minimal:amd64 (2.7.12-1ubuntu0~16.04.3, automatic), libalgorithm-diff-perl:amd64 (1.19.03-1, automatic), libalgorithm-merge-perl:amd64 (0.08-3, automatic), python3-urllib3:amd64 (1.13.1-2ubuntu0.16.04.1, automatic), binutils:amd64 (2.26.1-1ubuntu1~16.04.6, automatic), cpp:amd64 (4:5.3.1-1ubuntu1, automatic), libitm1:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), g++:amd64 (4:5.3.1-1ubuntu1, automatic), perl-modules-5.22:amd64 (5.22.1-9ubuntu0.2, automatic), libpython2.7:amd64 (2.7.12-1ubuntu0~16.04.3, automatic), python2.7:amd64 (2.7.12-1ubuntu0~16.04.3), gcc:amd64 (4:5.3.1-1ubuntu1, automatic), git:amd64 (1:2.7.4-0ubuntu1.3), libpython2.7-dev:amd64 (2.7.12-1ubuntu0~16.04.3, automatic), libcilkrts5:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), python3-six:amd64 (1.10.0-3, automatic), libasan2:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libquadmath0:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), python:amd64 (2.7.12-1~16.04, automatic), libx11-6:amd64 (2:1.6.3-1ubuntu2, automatic), python3-requests:amd64 (2.9.1-3, automatic), libisl15:amd64 (0.16.1-1, automatic), build-essential:amd64 (12.1ubuntu2), libfile-fcntllock-perl:amd64 (0.22-3, automatic), libperl5.22:amd64 (5.22.1-9ubuntu0.2, automatic), libpython-stdlib:amd64 (2.7.12-1~16.04, automatic), libnfnetlink0:amd64 (1.0.1-3, automatic), libstdc++-5-dev:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libxau6:amd64 (1:1.0.8-1, automatic), libtsan0:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libubsan0:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), g++-5:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libxcb1:amd64 (1.11.1-1ubuntu1, automatic), libpython-dev:amd64 (2.7.12-1~16.04, automatic), make:amd64 (4.1-6, automatic), fakeroot:amd64 (1.20.2-1ubuntu1, automatic), libgdbm3:amd64 (1.8.3-13.1, automatic), gcc-5:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libxmuu1:amd64 (2:1.1.2-2, automatic), xz-utils:amd64 (5.1.1alpha+20120614-2ubuntu2, automatic), ncurses-term:amd64 (6.0+20160213-1ubuntu1, automatic), python3-pkg-resources:amd64 (20.7.0-1, automatic), liblsan0:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), libgomp1:amd64 (5.4.0-6ubuntu1~16.04.9, automatic), python-dev:amd64 (2.7.12-1~16.04), openssh-server:amd64 (1:7.2p2-4ubuntu2.4), libx11-data:amd64 (2:1.6.3-1ubuntu2, automatic), manpages-dev:amd64 (4.04-2, automatic), libc-dev-bin:amd64 (2.23-0ubuntu10, automatic), libpython2.7-minimal:a...