From 2292ce9aed3f404107251b76a22a1e80b98f67ac Mon Sep 17 00:00:00 2001
From: "James E. Blair" <jeblair@redhat.com>
Date: Thu, 31 Jan 2019 13:44:04 -0800
Subject: [PATCH] Add a role to run a buildset registry

Part of a system to interact with an intermediate registry.

Change-Id: I2f4662cc587f9379e9ba3b7b705c85793a41864e
---
 roles/run-buildset-registry/README.rst        | 38 ++++++++
 .../run-buildset-registry/defaults/main.yaml  |  1 +
 roles/run-buildset-registry/tasks/main.yaml   | 91 +++++++++++++++++++
 3 files changed, 130 insertions(+)
 create mode 100644 roles/run-buildset-registry/README.rst
 create mode 100644 roles/run-buildset-registry/defaults/main.yaml
 create mode 100644 roles/run-buildset-registry/tasks/main.yaml

diff --git a/roles/run-buildset-registry/README.rst b/roles/run-buildset-registry/README.rst
new file mode 100644
index 000000000..bcd26de26
--- /dev/null
+++ b/roles/run-buildset-registry/README.rst
@@ -0,0 +1,38 @@
+Runs a docker registry for the use of this buildset.
+
+This may be used for a single job running on a single node, or it may
+be used at the root of a job graph so that multiple jobs running for a
+single change can share the registry.
+
+**Role Variables**
+
+.. zuul:rolevar:: buildset_registry_root
+   :default: {{ ansible_user_dir }}/buildset_registry
+
+   Path for the registry volumes.
+
+**Return Values**
+
+.. zuul:rolevar:: buildset_registry
+
+   Information about the registry.
+
+   .. zuul:rolevar:: host
+
+      The host (IP address) of the registry.
+
+   .. zuul:rolevar:: port
+
+      The port on which the registry is listening.
+
+   .. zuul:rolevar:: username
+
+      The username used to access the registry via HTTP basic auth.
+
+   .. zuul:rolevar:: password
+
+      The password used to access the registry via HTTP basic auth.
+
+   .. zuul:rolevar:: cert
+
+      The (self-signed) certificate used by the registry.
diff --git a/roles/run-buildset-registry/defaults/main.yaml b/roles/run-buildset-registry/defaults/main.yaml
new file mode 100644
index 000000000..37c0730d4
--- /dev/null
+++ b/roles/run-buildset-registry/defaults/main.yaml
@@ -0,0 +1 @@
+buildset_registry_root: "{{ ansible_user_dir }}/buildset_registry"
diff --git a/roles/run-buildset-registry/tasks/main.yaml b/roles/run-buildset-registry/tasks/main.yaml
new file mode 100644
index 000000000..4e7575b36
--- /dev/null
+++ b/roles/run-buildset-registry/tasks/main.yaml
@@ -0,0 +1,91 @@
+- name: Install packages
+  become: yes
+  package:
+    name:
+      - python-docker
+      - python-openssl
+      - python-passlib
+      - python-bcrypt
+    state: present
+  when: "'python3' not in ansible_python_interpreter"
+- name: Install packages
+  become: yes
+  package:
+    name:
+      - python3-docker
+      - python3-openssl
+      - python3-passlib
+      - python3-bcrypt
+    state: present
+  when: "'python3' in ansible_python_interpreter"
+- name: Ensure Docker registry volume directories exists
+  file:
+    state: directory
+    path: "{{ buildset_registry_root}}/{{ item }}"
+  loop:
+    - certs
+    - auth
+# TODO: use password lookup after allowing access to it in Zuul
+- name: Generate registry password
+  set_fact:
+    registry_password: "{{ (ansible_date_time.iso8601_micro | password_hash('sha256'))[-20:] }}"
+- name: Write htpassword file
+  htpasswd:
+    create: true
+    crypt_scheme: bcrypt
+    path: "{{ buildset_registry_root}}/auth/htpasswd"
+    name: "zuul"
+    password: "{{ registry_password }}"
+- name: Generate a TLS key for the Docker registry
+  openssl_privatekey:
+    path: "{{ buildset_registry_root}}/certs/domain.key"
+- name: Generate a TLS CSR for the Docker registry
+  openssl_csr:
+    path: "{{ buildset_registry_root}}/certs/domain.csr"
+    privatekey_path: "{{ buildset_registry_root}}/certs/domain.key"
+    common_name: "{{ ansible_host }}"
+    subject_alt_name: "DNS:{{ ansible_host }},IP:{{ ansible_host }}"
+- name: Generate a TLS cert for the Docker registry
+  openssl_certificate:
+    path: "{{ buildset_registry_root}}/certs/domain.crt"
+    csr_path: "{{ buildset_registry_root}}/certs/domain.csr"
+    privatekey_path: "{{ buildset_registry_root}}/certs/domain.key"
+    provider: selfsigned
+  register: generated_cert
+- name: Read TLS certificate
+  slurp:
+    src: "{{ generated_cert.filename }}"
+  register: certificate
+- name: Decode TLS certificate
+  set_fact:
+    certificate: "{{ certificate.content | b64decode }}"
+- name: Start a docker registry
+  docker_container:
+    name: buildset_registry
+    image: registry:2
+    state: started
+    restart_policy: always
+    ports:
+     - "5000:5000"
+    env:
+      REGISTRY_HTTP_TLS_CERTIFICATE: /certs/domain.crt
+      REGISTRY_HTTP_TLS_KEY: /certs/domain.key
+      REGISTRY_AUTH: htpasswd
+      REGISTRY_AUTH_HTPASSWD_PATH: /auth/htpasswd
+      REGISTRY_AUTH_HTPASSWD_REALM: Registry Realm
+    volumes:
+      - "{{ buildset_registry_root}}/data:/var/lib/registry"
+      - "{{ buildset_registry_root}}/certs:/certs"
+      - "{{ buildset_registry_root}}/auth:/auth"
+- name: Set registry information fact
+  set_fact:
+    buildset_registry:
+      host: "{{ ansible_host }}"
+      port: 5000
+      username: zuul
+      password: "{{ registry_password }}"
+      cert: "{{ certificate }}"
+- name: Return registry information to Zuul
+  zuul_return:
+    data:
+      buildset_registry: "{{ buildset_registry }}"