diff --git a/doc/source/howto.rst b/doc/source/howto.rst
index 3baefe502..a27488df3 100644
--- a/doc/source/howto.rst
+++ b/doc/source/howto.rst
@@ -248,6 +248,11 @@ Note:
   playbook due to the fact that is an IO-intensive operation that can
   take a great deal of time.
 
+- In order to cap requirements for installation, an ``upper_constraints_file``
+  setting is defined. This is consuming the ``UPPER_CONSTRAINTS_FILE`` env
+  var by default, to properly integrate with CI systems, and will default
+  to ``/opt/stack/requirements/upper-constraints.txt`` file if not present.
+
 Manually test with Virtual Machines
 ===================================
 
diff --git a/playbooks/roles/bifrost-ironic-install/defaults/main.yml b/playbooks/roles/bifrost-ironic-install/defaults/main.yml
index 437f596e0..8a29affe4 100644
--- a/playbooks/roles/bifrost-ironic-install/defaults/main.yml
+++ b/playbooks/roles/bifrost-ironic-install/defaults/main.yml
@@ -76,6 +76,7 @@ ironicclient_git_folder: /opt/stack/python-ironicclient
 shade_git_folder: /opt/stack/shade
 dib_git_folder: /opt/stack/diskimage-builder
 reqs_git_folder: /opt/stack/requirements
+upper_constraints_file: "{{ lookup('env', 'UPPER_CONSTRAINTS_FILE') | default(reqs_git_folder + '/upper-constraints.txt', True) }}"
 staging_drivers_git_folder: /opt/stack/ironic-staging-drivers
 ironicinspector_git_folder: /opt/stack/ironic-inspector
 ironicinspectorclient_git_folder: /opt/stack/python-ironic-inspector-client
diff --git a/playbooks/roles/bifrost-ironic-install/tasks/inspector_install.yml b/playbooks/roles/bifrost-ironic-install/tasks/inspector_install.yml
index 239e4f4d2..86de9197d 100644
--- a/playbooks/roles/bifrost-ironic-install/tasks/inspector_install.yml
+++ b/playbooks/roles/bifrost-ironic-install/tasks/inspector_install.yml
@@ -19,7 +19,7 @@
     state=latest
     sourcedir={{ ironicinspector_git_folder }}
     source_install={{ ironicinspector_source_install }}
-    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ reqs_git_folder }}/upper-constraints.txt"
+    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ upper_constraints_file }}"
 
 - name: "Inspector - PIP client install"
   include: pip_install.yml
@@ -27,4 +27,4 @@
     state=latest
     source_dir={{ ironicinspectorclient_git_folder }}
     sourc_install={{ ironicinspectorclient_source_install }}
-    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ reqs_git_folder }}/upper-constraints.txt"
+    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ upper_constraints_file }}"
diff --git a/playbooks/roles/bifrost-ironic-install/tasks/install.yml b/playbooks/roles/bifrost-ironic-install/tasks/install.yml
index 5760768eb..867fbab86 100644
--- a/playbooks/roles/bifrost-ironic-install/tasks/install.yml
+++ b/playbooks/roles/bifrost-ironic-install/tasks/install.yml
@@ -113,7 +113,7 @@
     state=latest
     sourcedir={{ ironic_git_folder }}
     source_install=true
-    extra_args="--no-cache-dir --upgrade -c {{ reqs_git_folder }}/upper-constraints.txt"
+    extra_args="--no-cache-dir --upgrade -c {{ upper_constraints_file }}"
   when: skip_install is not defined
 
 - name: "Install ironic-inspector to permit use of inspection interface"
diff --git a/playbooks/roles/bifrost-ironic-install/tasks/staging_install.yml b/playbooks/roles/bifrost-ironic-install/tasks/staging_install.yml
index 0e2624714..d2fa6479e 100644
--- a/playbooks/roles/bifrost-ironic-install/tasks/staging_install.yml
+++ b/playbooks/roles/bifrost-ironic-install/tasks/staging_install.yml
@@ -19,4 +19,4 @@
     state=latest
     sourcedir={{ staging_drivers_git_folder }}
     source_install={{ staging_drivers_source_install }}
-    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ reqs_git_folder }}/upper-constraints.txt"
+    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ upper_constraints_file }}"
diff --git a/playbooks/roles/bifrost-keystone-install/tasks/install.yml b/playbooks/roles/bifrost-keystone-install/tasks/install.yml
index dfb5ac6bd..eb7d31d0b 100644
--- a/playbooks/roles/bifrost-keystone-install/tasks/install.yml
+++ b/playbooks/roles/bifrost-keystone-install/tasks/install.yml
@@ -44,5 +44,5 @@
     state=latest
     sourcedir={{ keystone_git_folder }}
     source_install={{ keystone_source_install | bool }}
-    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ reqs_git_folder }}/upper-constraints.txt"
+    extra_args="--no-cache-dir --upgrade --force-reinstall -c {{ upper_constraints_file }}"
   when: skip_install is not defined
diff --git a/playbooks/roles/bifrost-prep-for-install/defaults/main.yml b/playbooks/roles/bifrost-prep-for-install/defaults/main.yml
index 9a341f00c..e068a6f64 100644
--- a/playbooks/roles/bifrost-prep-for-install/defaults/main.yml
+++ b/playbooks/roles/bifrost-prep-for-install/defaults/main.yml
@@ -19,6 +19,7 @@ ironicinspectorclient_git_folder: "{{ git_root}}/python-ironic-inspector-client"
 shade_git_folder: "{{ git_root}}/shade"
 dib_git_folder: "{{ git_root }}/diskimage-builder"
 reqs_git_folder: "{{ git_root }}/requirements"
+upper_constraints_file: "{{ lookup('env', 'UPPER_CONSTRAINTS_FILE') | default(reqs_git_folder + '/upper-constraints.txt', True) }}"
 staging_drivers_git_folder: "{{ git_root }}/ironic-staging-drivers"
 keystone_git_folder: "{{ git_root}}/keystone"
 # *_git_branch can be overridden for stable branch testing
diff --git a/releasenotes/notes/override_upper_constraints-79f837d8ac58e53d.yaml b/releasenotes/notes/override_upper_constraints-79f837d8ac58e53d.yaml
new file mode 100644
index 000000000..bab27408e
--- /dev/null
+++ b/releasenotes/notes/override_upper_constraints-79f837d8ac58e53d.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - Allow consuming upper_constraints_file from an env
+    var UPPER_CONSTRAINTS_FILE. This will be specially
+    useful for OpenStack CI, where this var is defined
+    on each job run, pointing to the right requirements
+    file depending on branch.
+