Remove Python 2 support

Ussuri release is the one in which we drop Python 2 support, as its EOL
is pretty close now. This commit does so in kuryr-kubernetes by
removing Python 2 unit test jobs, switching all tempest jobs to Python
3, removing specific jobs for Python 3 and updating Dockerfiles to
centos:8 that includes Python 3 from the box.

Also CentOS 7 job is removed from check queue as it seems it doesn't
play well with Python 3. A CentOS 8 job will get created soon.

Change-Id: Id9983d2fd83cef89e3198b2760816cf4a851008b

.zuul.d/base.yaml

@@ -39,6 +39,7 @@
         Q_BUILD_OVS_FROM_GIT: true
         KURYR_K8S_CLOUD_PROVIDER: false
         ETCD_USE_RAMDISK: true
+        USE_PYTHON3: true
       devstack_services:
         # TODO(dmellado):Temporary workaround until proper fix
         base: false

.zuul.d/octavia.yaml

@@ -53,15 +53,6 @@
     nodeset: openstack-centos-7-single-node
     voting: false
 
-- job:
-    name: kuryr-kubernetes-tempest-py36
-    parent: kuryr-kubernetes-tempest
-    description: |
-      Tempest with DevStack running on Python 3.6
-    vars:
-      devstack_localrc:
-        USE_PYTHON3: true
-
 - job:
     name: kuryr-kubernetes-tempest-containerized
     parent: kuryr-kubernetes-tempest
@@ -142,17 +133,6 @@
         KURYR_SUBNET_DRIVER: namespace
     voting: false
 
-- job:
-    name: kuryr-kubernetes-tempest-containerized-py36
-    description: |
-      Tempest with Kuryr running on Python3.6 containers
-    parent: kuryr-kubernetes-tempest-containerized
-    vars:
-      devstack_localrc:
-        KURYR_CONTAINERS_USE_PY3: True
-        USE_PYTHON3: true
-    voting: true
-
 - job:
     name: kuryr-kubernetes-tempest-containerized-openshift
     description: Tempest with containers and OpenShift

.zuul.d/project.yaml

@@ -21,15 +21,11 @@
         - kuryr-kubernetes-tempest-containerized
         - kuryr-kubernetes-tempest-containerized-lower-constraints
         - kuryr-kubernetes-tempest-containerized-ovn
-        - kuryr-kubernetes-tempest-py36
-        - kuryr-kubernetes-tempest-containerized-py36
         - kuryr-kubernetes-tempest-multinode-containerized
-        - kuryr-kubernetes-tempest-centos-7
     gate:
       jobs:
         - kuryr-kubernetes-tempest
-        - kuryr-kubernetes-tempest-py36
-        - kuryr-kubernetes-tempest-containerized-py36
+        - kuryr-kubernetes-tempest-containerized
     experimental:
       jobs:
         - kuryr-kubernetes-tempest-containerized-openshift
@@ -45,7 +41,6 @@
 
 - project:
     templates:
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - openstack-lower-constraints-jobs
       - publish-openstack-docs-pti

cni.Dockerfile

@@ -4,19 +4,19 @@ WORKDIR /go/src/opendev.com/kuryr-kubernetes
 COPY . .
 RUN go build -o /go/bin/kuryr-cni ./kuryr_cni
 
-FROM centos:7
+FROM centos:8
 LABEL authors="Antoni Segura Puimedon<toni@kuryr.org>, Michał Dulko<mdulko@redhat.com>"
 
 ARG UPPER_CONSTRAINTS_FILE="https://releases.openstack.org/constraints/upper/master"
 ARG OSLO_LOCK_PATH=/var/kuryr-lock
 
 RUN yum install -y epel-release https://rdoproject.org/repos/rdo-release.rpm \
-    && yum install -y --setopt=tsflags=nodocs python-pip iproute bridge-utils openvswitch sudo libstdc++ \
-    && yum install -y --setopt=tsflags=nodocs gcc python-devel git
+    && yum install -y --setopt=tsflags=nodocs python3-pip openvswitch sudo \
+    && yum install -y --setopt=tsflags=nodocs gcc python3-devel git
 
 COPY . /opt/kuryr-kubernetes
 
-RUN pip install -c $UPPER_CONSTRAINTS_FILE /opt/kuryr-kubernetes \
+RUN pip3 install -c $UPPER_CONSTRAINTS_FILE /opt/kuryr-kubernetes \
     && cp /opt/kuryr-kubernetes/cni_ds_init /usr/bin/cni_ds_init \
     && mkdir -p /etc/kuryr-cni \
     && cp /opt/kuryr-kubernetes/etc/cni/net.d/* /etc/kuryr-cni \

cni_py3.Dockerfile

@@ -1,35 +0,0 @@
-FROM golang:1.11 AS builder
-
-WORKDIR /go/src/opendev.com/kuryr-kubernetes
-COPY . .
-RUN go build -o /go/bin/kuryr-cni ./kuryr_cni
-
-FROM fedora:30
-LABEL authors="Antoni Segura Puimedon<toni@kuryr.org>, Michał Dulko<mdulko@redhat.com>"
-
-ARG UPPER_CONSTRAINTS_FILE="https://releases.openstack.org/constraints/upper/master"
-ARG OSLO_LOCK_PATH=/var/kuryr-lock
-
-RUN dnf update -y \
-    && dnf install -y --setopt=tsflags=nodocs python36 iproute bridge-utils openvswitch sudo libstdc++ \
-    && dnf install -y --setopt=tsflags=nodocs gcc git
-
-COPY . /opt/kuryr-kubernetes
-
-RUN python3.6 -m ensurepip \
-    && python3.6 -m pip install -c $UPPER_CONSTRAINTS_FILE /opt/kuryr-kubernetes \
-    && cp /opt/kuryr-kubernetes/cni_ds_init /usr/bin/cni_ds_init \
-    && mkdir -p /etc/kuryr-cni \
-    && cp /opt/kuryr-kubernetes/etc/cni/net.d/* /etc/kuryr-cni \
-    && dnf -y history undo last \
-    && dnf clean all \
-    && rm -rf /opt/kuryr-kubernetes \
-    && mkdir ${OSLO_LOCK_PATH}
-
-COPY --from=builder /go/bin/kuryr-cni /kuryr-cni
-
-ARG CNI_DAEMON=True
-ENV CNI_DAEMON ${CNI_DAEMON}
-ENV OSLO_LOCK_PATH=${OSLO_LOCK_PATH}
-
-ENTRYPOINT [ "cni_ds_init" ]

controller.Dockerfile

@@ -1,15 +1,15 @@
-FROM centos:7
+FROM centos:8
 LABEL authors="Antoni Segura Puimedon<toni@kuryr.org>, Michał Dulko<mdulko@redhat.com>"
 
 ARG UPPER_CONSTRAINTS_FILE="https://releases.openstack.org/constraints/upper/master"
 
 RUN yum install -y epel-release \
-    && yum install -y --setopt=tsflags=nodocs python-pip libstdc++ \
-    && yum install -y --setopt=tsflags=nodocs gcc python-devel git
+    && yum install -y --setopt=tsflags=nodocs python3-pip libstdc++ \
+    && yum install -y --setopt=tsflags=nodocs gcc python3-devel git
 
 COPY . /opt/kuryr-kubernetes
 
-RUN pip install -c $UPPER_CONSTRAINTS_FILE --no-cache-dir /opt/kuryr-kubernetes \
+RUN pip3 install -c $UPPER_CONSTRAINTS_FILE --no-cache-dir /opt/kuryr-kubernetes \
     && yum -y history undo last \
     && yum clean all \
     && rm -rf /opt/kuryr-kubernetes \
@@ -22,4 +22,4 @@ RUN pip install -c $UPPER_CONSTRAINTS_FILE --no-cache-dir /opt/kuryr-kubernetes
 
 USER kuryr
 CMD ["--config-dir", "/etc/kuryr"]
-ENTRYPOINT [ "/usr/bin/kuryr-k8s-controller" ]
+ENTRYPOINT [ "kuryr-k8s-controller" ]

controller_py3.Dockerfile

@@ -1,26 +0,0 @@
-FROM fedora:30
-LABEL authors="Antoni Segura Puimedon<toni@kuryr.org>, Michał Dulko<mdulko@redhat.com>"
-
-ARG UPPER_CONSTRAINTS_FILE="https://releases.openstack.org/constraints/upper/master"
-
-RUN dnf update -y \
-    && dnf install -y --setopt=tsflags=nodocs python36 libstdc++ \
-    && dnf install -y --setopt=tsflags=nodocs gcc git
-
-COPY . /opt/kuryr-kubernetes
-
-RUN python3.6 -m ensurepip \
-    && python3.6 -m pip install -c $UPPER_CONSTRAINTS_FILE --no-cache-dir /opt/kuryr-kubernetes \
-    && dnf -y history undo last \
-    && dnf clean all \
-    && rm -rf /opt/kuryr-kubernetes \
-    && groupadd -r kuryr -g 711 \
-    && useradd -u 711 -g kuryr \
-         -d /opt/kuryr-kubernetes \
-         -s /sbin/nologin \
-         -c "Kuryr controller user" \
-         kuryr
-
-USER kuryr
-CMD ["--config-dir", "/etc/kuryr"]
-ENTRYPOINT [ "/usr/local/bin/kuryr-k8s-controller" ]

devstack/lib/kuryr_kubernetes

@@ -327,17 +327,10 @@ EOF
 function build_kuryr_containers() {
     local build_args
     local build_dir
-    local use_py3
-    local py_suffix
 
     build_dir="${DEST}/kuryr-kubernetes"
     pushd "$build_dir"
 
-    use_py3=$(trueorfalse False KURYR_CONTAINERS_USE_PY3)
-    if [[ "$use_py3" == "True" ]]; then
-        py_suffix="_py3"
-    fi
-
     KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS=$(trueorfalse False KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS)
     if [[ "$KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS" == "True" ]]; then
         build_args="--build-arg UPPER_CONSTRAINTS_FILE=/opt/kuryr-kubernetes/lower-constraints.txt"
@@ -348,11 +341,11 @@ function build_kuryr_containers() {
     #               resolved instead of podman we need to use buildah directly,
     #               hence this awful if clause.
     if [[ ${CONTAINER_ENGINE} == 'crio' ]]; then
-        sudo buildah bud -t docker.io/kuryr/controller -f controller${py_suffix}.Dockerfile .
-        sudo buildah bud -t docker.io/kuryr/cni -f cni${py_suffix}.Dockerfile .
+        sudo buildah bud -t docker.io/kuryr/controller -f controller.Dockerfile .
+        sudo buildah bud -t docker.io/kuryr/cni -f cni.Dockerfile .
     else
-        container_runtime build -t kuryr/controller -f controller${py_suffix}.Dockerfile ${build_args}  .
-        container_runtime build -t kuryr/cni -f cni${py_suffix}.Dockerfile ${build_args} .
+        container_runtime build -t kuryr/controller -f controller.Dockerfile ${build_args}  .
+        container_runtime build -t kuryr/cni -f cni.Dockerfile ${build_args} .
     fi
     popd
 }

devstack/settings

@@ -102,9 +102,6 @@ KURYR_ENABLE_INGRESS=${KURYR_ENABLE_INGRESS:-False}
 # Kuryr L7 router's name
 KURYR_L7_ROUTER_NAME=${KURYR_L7_ROUTER_NAME:-kuryr-l7-router}
 
-# Whether to use Python3
-KURYR_CONTAINERS_USE_PY3=${KURYR_CONTAINERS_USE_PY3:-False}
-
 # Whether to use lower-constraints.txt when installing dependencies.
 KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS=${KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS:-False}
 

releasenotes/notes/drop-py27-60f55b6bc1d082bc.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of Kuryr-Kubernetes to support
+    py2.7 is OpenStack Train. The minimum version of Python now supported by
+    Kuryr-Kubernetes is Python 3.6.

setup.cfg

@@ -13,8 +13,6 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.3.1
-envlist = py27,py37,pep8
+envlist = py37,pep8
 skipsdist = True
 
 [testenv]
@@ -18,18 +18,9 @@ commands = find {toxinidir} -type f -name "*.py[c|o]" -delete
            rm -f .testrepository/times.dbm
            stestr run {posargs}
 
-[testenv:fullstack]
-basepython = python2.7
-setenv = OS_TEST_PATH=./kuryr/tests/fullstack
-passenv = OS_*
-
 [testenv:debug]
 commands = oslo_debug_helper -t kuryr_kubernetes/tests {posargs}
 
-[testenv:debug-py27]
-basepython = python2.7
-commands = oslo_debug_helper -t kuryr_kubernetes/tests {posargs}
-
 [testenv:debug-py36]
 basepython = python3.6
 commands = oslo_debug_helper -t kuryr_kubernetes/tests {posargs}