diff --git a/.functests b/.functests
index ea27adc8..7ee71ba3 100755
--- a/.functests
+++ b/.functests
@@ -16,14 +16,6 @@ shift
 
 ant build_storlets
 
-if [ ${USE_PYTHON3} == "False" ]; then
-    # TODO(takashi): We should use python-swiftclent 3.8.1 to avoid connection
-    #                leak on py2.7(lp#1873435). Remove this once we get a fixed
-    #                version released.
-    pip uninstall python-swiftclient
-    pip install python-swiftclient==3.8.1
-fi
-
 SRC_DIR=$(cd $(dirname $0); pwd)
 cd ${SRC_DIR}/tests/functional
 if [ "$FLAVOR" == "jenkins" ]; then
diff --git a/.zuul.yaml b/.zuul.yaml
index c46ade8c..d89a935f 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,17 +1,14 @@
 - project:
     templates:
-      - openstack-python-jobs
       - openstack-python3-zed-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check:
       jobs:
         - storlets-functional
-        - storlets-functional-py3
     gate:
       jobs:
         - storlets-functional
-        - storlets-functional-py3
 
 - job:
     name: storlets-functional
@@ -20,19 +17,6 @@
     post-run: playbooks/storlets-functional/post.yaml
     nodeset: ubuntu-focal
     timeout: 2400
-    voting: false
-    irrelevant-files:
-      - ^(api-ref|doc|releasenotes)/.*$
-      - ^(.gitreview|.mailmap|AUTHORS|CHANGELOG)$
-      - ^tests/unit/.*$
-
-- job:
-    name: storlets-functional-py3
-    pre-run: playbooks/storlets-functional/pre-py3.yaml
-    run: playbooks/storlets-functional/run-py3.yaml
-    post-run: playbooks/storlets-functional/post-py3.yaml
-    nodeset: ubuntu-focal
-    timeout: 2400
     irrelevant-files:
       - ^(api-ref|doc|releasenotes)/.*$
       - ^(.gitreview|.mailmap|AUTHORS|CHANGELOG)$
diff --git a/devstack/localrc.py2.sample b/devstack/localrc.py2.sample
deleted file mode 100644
index 1869a075..00000000
--- a/devstack/localrc.py2.sample
+++ /dev/null
@@ -1,18 +0,0 @@
-ENABLE_HTTPD_MOD_WSGI_SERVICES=False
-ENABLED_SERVICES=key,swift,mysql
-# We need stable/train keystone to run it on python2
-KEYSTONE_BRANCH=stable/train
-HOST_IP=127.0.0.1
-ADMIN_PASSWORD=admin
-MYSQL_PASSWORD=$ADMIN_PASSWORD
-RABBIT_PASSWORD=$ADMIN_PASSWORD
-SERVICE_PASSWORD=$ADMIN_PASSWORD
-SWIFT_SERVICE_PROTOCOL=${SWIFT_SERVICE_PROTOCOL:-http}
-SWIFT_DEFAULT_BIND_PORT=${SWIFT_DEFAULT_BIND_PORT:-8080}
-# service local host is used for ring building
-SWIFT_SERVICE_LOCAL_HOST=$HOST_IP
-# service listen address for prox
-SWIFT_SERVICE_LISTEN_ADDRESS=$HOST_IP
-SWIFT_LOOPBACK_DISK_SIZE=20G
-SWIFT_MAX_FILE_SIZE=5368709122
-SWIFT_HASH=1234567890
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index f399c860..3aecaada 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -125,11 +125,7 @@ function configure_swift_and_keystone_for_storlets {
     _generate_swift_middleware_conf
     _generate_storlet-docker-gateway
 
-    if [ "${USE_PYTHON3}" == "False" ]; then
-        sudo python2 devstack/swift_config.py install /tmp/swift_middleware_conf $STORLETS_SWIFT_RUNTIME_USER
-    else
-        sudo python3 devstack/swift_config.py install /tmp/swift_middleware_conf $STORLETS_SWIFT_RUNTIME_USER
-    fi
+    sudo python3 devstack/swift_config.py install /tmp/swift_middleware_conf $STORLETS_SWIFT_RUNTIME_USER
 
     rm /tmp/swift_middleware_conf
     rm /tmp/storlet-docker-gateway.conf
diff --git a/playbooks/storlets-functional/post-py3.yaml b/playbooks/storlets-functional/post-py3.yaml
deleted file mode 100644
index 1a051b1f..00000000
--- a/playbooks/storlets-functional/post-py3.yaml
+++ /dev/null
@@ -1,52 +0,0 @@
----
-- hosts: all
-  tasks:
-    - name: Create log directory to pull
-      file:
-        path: '{{ zuul.project.src_dir }}/logs'
-        state: directory
-
-    - name: Prepare the logs into user space
-      shell: "egrep {{ item }} /var/log/syslog > {{ zuul.project.src_dir }}/logs/{{ item }}.log"
-      with_items:
-        - "account-server"
-        - "container-server"
-        - "object-server"
-        - "proxy-server"
-        - "ansible"
-        - "storlets-daemon"
-        - "daemon-factory"
-      become: yes
-
-    - name: Change log permisson as readable
-      file:
-        path: "{{ zuul.project.src_dir }}/logs/{{ item }}.log"
-        mode: 0644
-      with_items:
-        - "account-server"
-        - "container-server"
-        - "object-server"
-        - "proxy-server"
-        - "ansible"
-        - "storlets-daemon"
-        - "daemon-factory"
-      become: yes
-
-    - name: Copy logs from worker nodes to executor node
-      synchronize:
-        # TODO: make it sort of tox_envdir
-        src: '{{ zuul.project.src_dir }}/logs'
-        dest: '{{ zuul.executor.log_root }}'
-        mode: pull
-        copy_links: true
-        verify_host: true
-      ignore_errors: yes
-
-    - name: Copy conf files from worker nodes to executor node
-      synchronize:
-        src: '/etc/swift'
-        dest: '{{ zuul.executor.log_root }}'
-        mode: pull
-        copy_links: true
-        verify_host: true
-      ignore_errors: yes
diff --git a/playbooks/storlets-functional/pre-py3.yaml b/playbooks/storlets-functional/pre-py3.yaml
deleted file mode 100644
index 8438699d..00000000
--- a/playbooks/storlets-functional/pre-py3.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-- hosts: all
-  tasks:
-    - name: installing python3 packages
-      package: name={{ item }} state=present
-      with_items:
-        - python3
-        - python3-venv
-        - python3-nose
-        - python3-pip
-      become: yes
-
-    - shell:
-        cmd: |
-          set -e
-          set -x
-          ./s2aio.sh install
-        executable: /bin/bash
-        chdir: 'src/{{ zuul.project.canonical_name }}'
-      environment:
-        USE_PYTHON3: "True"
-
-  roles:
-    - ensure-tox
diff --git a/playbooks/storlets-functional/pre.yaml b/playbooks/storlets-functional/pre.yaml
index 23a998a0..64336026 100644
--- a/playbooks/storlets-functional/pre.yaml
+++ b/playbooks/storlets-functional/pre.yaml
@@ -1,6 +1,15 @@
 ---
 - hosts: all
   tasks:
+    - name: installing python3 packages
+      package: name={{ item }} state=present
+      with_items:
+        - python3
+        - python3-venv
+        - python3-nose
+        - python3-pip
+      become: yes
+
     - shell:
         cmd: |
           set -e
@@ -8,8 +17,6 @@
           ./s2aio.sh install
         executable: /bin/bash
         chdir: 'src/{{ zuul.project.canonical_name }}'
-      environment:
-        USE_PYTHON3: "False"
 
   roles:
     - ensure-tox
diff --git a/playbooks/storlets-functional/run-py3.yaml b/playbooks/storlets-functional/run-py3.yaml
deleted file mode 100644
index 10ad54aa..00000000
--- a/playbooks/storlets-functional/run-py3.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
----
-- hosts: all
-  roles:
-    - tox
-  vars:
-    - tox_envlist: func-py3
diff --git a/playbooks/storlets-functional/run.yaml b/playbooks/storlets-functional/run.yaml
index 3259f36c..84aed15f 100644
--- a/playbooks/storlets-functional/run.yaml
+++ b/playbooks/storlets-functional/run.yaml
@@ -3,6 +3,4 @@
   roles:
     - tox
   vars:
-    - tox_envlist: func-py3
-  environment:
-    USE_PYTHON3: "False"
+    - tox_envlist: func
diff --git a/s2aio.sh b/s2aio.sh
index 8abf8f6f..ad735953 100755
--- a/s2aio.sh
+++ b/s2aio.sh
@@ -33,12 +33,8 @@ function usage {
 function _prepare_devstack_env {
     # Checkout devstack
     if [ ! -e $DEVSTACK_DIR ]; then
-        git clone https://github.com/openstack/devstack.git $DEVSTACK_DIR
-        if [ ${USE_PYTHON3} == "False" ]; then
-          cp devstack/localrc.py2.sample $DEVSTACK_DIR/localrc
-        else
-          cp devstack/localrc.sample $DEVSTACK_DIR/localrc
-        fi
+        git clone https://github.com/openstack-dev/devstack.git $DEVSTACK_DIR
+        cp devstack/localrc.sample $DEVSTACK_DIR/localrc
     fi
 
     source $DEVSTACK_DIR/stackrc
diff --git a/setup.cfg b/setup.cfg
index ea4c1d4e..b9304659 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,6 +6,7 @@ description_file =
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/storlets/latest/
+python_requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -13,13 +14,12 @@ 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
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3 :: Only
 
 [pbr]
 skip_authors = True
diff --git a/tox.ini b/tox.ini
index fd84b3a4..93109e74 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,12 @@
 [tox]
 minversion = 3.2.0
-envlist = py27,py36,py38,py39,pep8
+envlist = py36,py38,py39,pep8
 skipsdist = True
 ignore_basepython_conflict = True
 
 
 [testenv]
+basepython = python3
 usedevelop = True
 setenv =
    VIRTUAL_ENV={envdir}
@@ -27,46 +28,24 @@ whitelist_externals = bash
                       rm
 
 [testenv:pep8python]
-basepython = python3
 commands =
   flake8
   flake8 --filename=* bin --exclude=bin/*.sh
 
-[testenv:py27]
+[testenv:func]
 deps =
-  -c{toxinidir}/py2-constraints.txt
-  -r{toxinidir}/requirements.txt
   -r{toxinidir}/test-requirements.txt
   git+https://github.com/openstack/swift.git
-
-[testenv:func]
-basepython = python2.7
-deps = {[testenv:py27]deps}
 setenv =
    VIRTUAL_ENV={envdir}
    STORLET_SAMPLE_PATH={toxinidir}/StorletSamples
    CLUSTER_CONF_DIR={toxinidir}
 commands = {toxinidir}/.functests jenkins
-passenv = USE_PYTHON3
-
-[testenv:func-py3]
-basepython = python3
-deps =
-  -r{toxinidir}/test-requirements.txt
-  git+https://github.com/openstack/swift.git
-setenv =
-   VIRTUAL_ENV={envdir}
-   STORLET_SAMPLE_PATH={toxinidir}/StorletSamples
-   CLUSTER_CONF_DIR={toxinidir}
-commands = {[testenv:func]commands}
-passenv = {[testenv:func]passenv}
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
    {[testenv]setenv}
    PYTHON=coverage run --source storlets --parallel-mode
@@ -77,7 +56,6 @@ commands =
    coverage xml -o cover/coverage.xml
 
 [testenv:docs]
-basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
@@ -87,11 +65,9 @@ commands =
   sphinx-build -a -W -E -b html doc/source doc/build/html
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [testenv:bashate]
-basepython = python3
 # Run bashate check for all bash scripts
 # Ignores the following rules:
 #   E003: Indent not multiple of 4 (we prefer to use multiples of 2)
@@ -117,7 +93,6 @@ builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build
 
 [testenv:pep8]
-basepython = python3
 commands =
   {[testenv:pep8python]commands}
   {[testenv:bashate]commands}
@@ -125,6 +100,5 @@ passenv =
   HOME
 
 [testenv:releasenotes]
-basepython = python3
 deps = {[testenv:docs]deps}
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html