diff --git a/doc/requirements.txt b/doc/requirements.txt
index a61c706..492834a 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,11 @@
 sphinx>=2.0.0,!=2.1.0 # BSD
+
 otcdocstheme # Apache-2.0
+
 # releasenotes
 reno>=3.1.0 # Apache-2.0
+
+otc-sphinx-directives>=0.1.0
+sphinx-minify>=0.0.1 # Apache-2.0
+git+https://gitea.eco.tsi-dev.otc-service.com/infra/otc-metadata.git#egg=otc_metadata
+setuptools
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
index c9c84b9..976f958 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.1
-envlist = py310,pep8
+envlist = py39,pep8
 skipsdist = True
 ignore_basepython_conflict = True
 
@@ -8,24 +8,68 @@ ignore_basepython_conflict = True
 usedevelop = True
 install_command = pip install {opts} {packages}
 deps =
-    -r{toxinidir}/requirements.txt
+  -r{toxinidir}/requirements.txt
 commands = stestr run {posargs}
-           stestr slowest
+  stestr slowest
 
 [testenv:pep8]
-allowlist_externals =
-  doc8
 commands =
-    doc8 doc/source README.rst
+  doc8 doc/source README.rst
 
 [testenv:venv]
 deps =
-    -r{toxinidir}/requirements.txt
+  -r{toxinidir}/requirements.txt
 commands = {posargs}
 
+# This env is invoked in the periodic pipeline and is therefore responsible to
+# build all relevant docs at once.
 [testenv:docs]
 deps =
-    -r{toxinidir}/doc/requirements.txt
+  -r{toxinidir}/doc/requirements.txt
+  -c https://raw.githubusercontent.com/opentelekomcloud-docs/docs-constraints/main/constraints.txt
+allowlist_externals =
+  mkdir
+  cp
+  sh
+  rm
+  sphinx-build
 commands =
-    sphinx-build -W --keep-going -b html doc/source/ doc/build/html
+  rm -rf doc/build/html doc/build/html_temp doc/build/doctrees
+  sphinx-build -a -E -W -d doc/build/doctrees -b html doc/source doc/build/html_temp
+  sphinx-minify --input-directory doc/build/html_temp/ --output-directory doc/build/html
 
+[testenv:docs-pdf]
+deps =
+  {[testenv:docs]deps}
+  {[testenv:bindeps]deps}
+allowlist_externals =
+  rm
+  mkdir
+  wget
+  make
+  bash
+  cp
+commands =
+  mkdir -p doc/build/pdf
+  {[testenv:bindeps]commands}
+
+
+
+[testenv:bindeps]
+deps =
+    bindep
+allowlist_externals =
+    wget
+    rm
+    bash
+commands =
+    rm -rf {toxinidir}/bindep.txt
+    rm -rf {toxinidir}/packages.txt
+    wget -O {toxinidir}/bindep.txt https://raw.githubusercontent.com/opentelekomcloud/otcdocstheme/main/bindep.txt
+    bash -c "bindep test -b -f {toxinidir}/bindep.txt > {toxinidir}/packages.txt || true"
+    bash -c 'if [ -s {toxinidir}/packages.txt ]; then if command -v apt &>/dev/null; then apt update && xargs apt install --no-install-recommends -y < {toxinidir}/packages.txt; fi; fi'
+    bash -c 'if [ -s {toxinidir}/packages.txt ]; then if command -v dnf &>/dev/null; then dnf install -y $(cat {toxinidir}/packages.txt); fi; fi'
+
+[doc8]
+ignore = D001
+extensions = .rst, .yaml
\ No newline at end of file