copr-be: enable rpmeta build time prediction (observability-only)

Deploy rpmeta config to copr-be.conf and hardware pools YAML with
real builder specs. Initially logging-only, does not affect VM allocation.

inventory/group_vars/copr_back_aws

@@ -53,6 +53,9 @@ copr_backend_data_2_raid1_volumes:
   - nvme-Amazon_Elastic_Block_Store_vol0f226a7163d28d8fd-part1
   - nvme-Amazon_Elastic_Block_Store_vol07293869d85a750b8-part1
 
+rpmeta_enabled: true
+rpmeta_hostname: rpmeta.fedoraproject.org
+
 notes: |
   Provide the backend for copr (3rd party packages)
   * Backend: Management of copr cloud infrastructure (OpenStack).

inventory/group_vars/copr_back_dev_aws

@@ -49,6 +49,9 @@ copr_backend_data_2_raid1_volumes:
   - nvme-Amazon_Elastic_Block_Store_vol0ce8220e998e2e32a-part1
   - nvme-Amazon_Elastic_Block_Store_vol0038e042c49987b82-part1
 
+rpmeta_enabled: true
+rpmeta_hostname: rpmeta.stg.fedoraproject.org
+
 notes: |
   Provide the testing environment of copr's backend
   This host is the testing environment for the cloud infrastructure of copr's backend

roles/copr/backend/tasks/main.yml

@@ -273,6 +273,19 @@
   - copr_infrastructure_password
   - provision_config
 
+- name: Deploy rpmeta HW pools config
+  ansible.builtin.template:
+    src: rpmeta-hw-pools.yaml.j2
+    dest: /etc/copr/rpmeta-hw-pools.yaml
+    owner: root
+    group: copr
+    mode: "0640"
+  when: rpmeta_enabled | default(false) | bool and rpmeta_hostname is defined
+  notify:
+  - Restart copr-backend
+  tags:
+  - config
+
 - name: Create messaging config directory
   ansible.builtin.file: dest=/etc/copr/msgbuses state=directory owner=copr group=copr mode=0700
   when: copr_messaging

roles/copr/backend/templates/copr-be.conf.j2

@@ -122,6 +122,13 @@ pulp_content_url={{ pulp_content_url }}
 sentry_dsn={{ copr_sentry_dsn }}
 {% endif %}
 
+{% if rpmeta_enabled | default(false) | bool and rpmeta_hostname is defined %}
+rpmeta_enabled=true
+rpmeta_url=https://{{ rpmeta_hostname }}
+rpmeta_timeout={{ rpmeta_timeout | default(5) }}
+rpmeta_hw_pools_config=/etc/copr/rpmeta-hw-pools.yaml
+{% endif %}
+
 
 [builder]
 # default is 1800, this probably has no effect!

roles/copr/backend/templates/rpmeta-hw-pools.yaml.j2

@@ -0,0 +1,40 @@
+# Hardware specs of base builder machines per architecture.
+# Used by copr-backend to call rpmeta with the correct HW info.
+# Update when builder instance types change.
+#
+# x86_64:  AWS c7i.xlarge  (4 vCPU / 7.6 GiB / 143 GiB swap)
+# aarch64: AWS c7g.xlarge  (4 vCPU / 7.6 GiB / 143 GiB swap)
+# ppc64le: POWER9 hypervisors in Fedora Community Cage (5 cores / 15 GiB / 140 GiB swap)
+# s390x:   IBM Cloud z15 (2 vCPU / 7.8 GiB / 143 GiB swap)
+
+x86_64:
+  cpu_model_name: "Intel(R) Xeon(R) Platinum 8488C"
+  cpu_arch: "x86_64"
+  cpu_model: "143"
+  cpu_cores: 4
+  ram: 7.6
+  swap: 143.0
+
+aarch64:
+  cpu_model_name: "Neoverse-V1"
+  cpu_arch: "aarch64"
+  cpu_model: "1"
+  cpu_cores: 4
+  ram: 7.6
+  swap: 143.0
+
+ppc64le:
+  cpu_model_name: "POWER9 (architected), altivec supported"
+  cpu_arch: "ppc64le"
+  cpu_model: "2.2 (pvr 004e 1202)"
+  cpu_cores: 5
+  ram: 15.0
+  swap: 140.0
+
+s390x:
+  cpu_model_name: "IBM z15"
+  cpu_arch: "s390x"
+  cpu_model: "8562"
+  cpu_cores: 2
+  ram: 7.8
+  swap: 143.0