feat: New spec and parser for host facts count of Satellite (#4206)

Signed-off-by: Huanhuan Li <huali@redhat.com>

insights/parsers/satellite_postgresql_query.py

@@ -10,6 +10,8 @@
 -----------------------------------------------------------------------------------------------------------
 SatelliteCoreTaskReservedResourceCount - command ``psql -d pulpcore -c 'select count(*) from core_taskreservedresource' --csv``
 -------------------------------------------------------------------------------------------------------------------------------
+SatelliteHostFactsCount - command ``psql -d foreman -c 'select count(*) from fact_names' --csv``
+------------------------------------------------------------------------------------------------
 SatelliteIgnoreSourceRpmsRepos - command ``psql -d foreman -c "select id, name from katello_root_repositories where ignorable_content like '%srpm%' and mirroring_policy='mirror_complete'" --csv``
 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 SatelliteKatellloReposWithMultipleRef - command ``psql -d foreman -c "select repository_href, count(*) from katello_repository_references group by repository_href having count(*) > 1;" --csv``
@@ -219,6 +221,25 @@ class SatelliteCoreTaskReservedResourceCount(SatellitePostgreSQLQuery):
     columns = ['count']
 
 
+@parser(Specs.satellite_host_facts_count)
+class SatelliteHostFactsCount(SatellitePostgreSQLQuery):
+    """
+    Parse the output of the command ``psql -d foreman -c 'select count(*) from fact_names' --csv``.
+
+    Sample output::
+
+        count
+        12121
+
+    Examples:
+        >>> type(host_facts_obj)
+        <class 'insights.parsers.satellite_postgresql_query.SatelliteHostFactsCount'>
+        >>> host_facts_obj[0]['count']
+        '12121'
+    """
+    columns = ['count']
+
+
 @parser(Specs.satellite_ignore_source_rpms_repos)
 class SatelliteIgnoreSourceRpmsRepos(SatellitePostgreSQLQuery):
     """

insights/specs/__init__.py

@@ -677,6 +677,7 @@ class Specs(SpecSet):
     satellite_custom_hiera = RegistryPoint()
     satellite_enabled_features = RegistryPoint()
     satellite_ignore_source_rpms_repos = RegistryPoint()
+    satellite_host_facts_count = RegistryPoint(no_obfuscate=['hostname', 'ip'])
     satellite_katello_repos_with_muliple_ref = RegistryPoint()
     satellite_logs_table_size = RegistryPoint(no_obfuscate=['hostname', 'ip'])
     satellite_missed_pulp_agent_queues = RegistryPoint()

insights/specs/default.py

@@ -569,6 +569,10 @@ class DefaultSpecs(Specs):
     )
     satellite_custom_hiera = simple_file("/etc/foreman-installer/custom-hiera.yaml")
     satellite_enabled_features = simple_command("/usr/bin/curl -sk https://localhost:9090/features --connect-timeout 5", deps=[IsSatellite])
+    satellite_host_facts_count = simple_command(
+        "/usr/bin/sudo -iu postgres /usr/bin/psql -d foreman -c 'select count(*) from fact_names' --csv",
+        deps=[IsSatellite]
+    )
     satellite_ignore_source_rpms_repos = simple_command(
         "/usr/bin/sudo -iu postgres /usr/bin/psql -d foreman -c \"select id, name from katello_root_repositories where ignorable_content like '%srpm%' and mirroring_policy='mirror_complete'\" --csv",
         deps=[IsSatellite]

insights/tests/parsers/test_satellite_postgresql_query.py

@@ -229,6 +229,11 @@
 7,Red Hat Enterprise Linux 8 for x86_64 - BaseOS RPMs 8
 """.strip()
 
+SATELLITE_HOST_FACTS_CONTENT = """
+count
+12121
+""".strip()
+
 
 def test_HTL_doc_examples():
     settings = satellite_postgresql_query.SatelliteAdminSettings(context_wrap(SATELLITE_SETTINGS_1))
@@ -243,6 +248,7 @@ def test_HTL_doc_examples():
     rhv_hosts = satellite_postgresql_query.SatelliteRHVHostsCount(context_wrap(SATELLITE_RHV_HOSTS_COUNT))
     revoked_certs = satellite_postgresql_query.SatelliteRevokedCertCount(context_wrap(SATELLITE_REVOKED_CERT_COUNT))
     ignore_srpm_repos = satellite_postgresql_query.SatelliteIgnoreSourceRpmsRepos(context_wrap(SATELLITE_IGNORE_SOURCE_RPMS_REPOS))
+    host_facts = satellite_postgresql_query.SatelliteHostFactsCount(context_wrap(SATELLITE_HOST_FACTS_CONTENT))
     globs = {
         'table': settings,
         'resources_table': resources_table,
@@ -255,7 +261,8 @@ def test_HTL_doc_examples():
         'logs_table': logs_table,
         'rhv_hosts': rhv_hosts,
         'revoked_certs': revoked_certs,
-        'i_srpm_repos': ignore_srpm_repos
+        'i_srpm_repos': ignore_srpm_repos,
+        'host_facts_obj': host_facts
     }
     failed, _ = doctest.testmod(satellite_postgresql_query, globs=globs)
     assert failed == 0
@@ -407,3 +414,9 @@ def test_satellite_ignore_srpm_repos():
     assert i_srpms_repos[0]['name'] == 'Red Hat Enterprise Linux 8 for x86_64 - AppStream RPMs 8'
     assert i_srpms_repos[1]['id'] == '7'
     assert i_srpms_repos[1]['name'] == 'Red Hat Enterprise Linux 8 for x86_64 - BaseOS RPMs 8'
+
+
+def test_satellite_host_facts():
+    host_facts = satellite_postgresql_query.SatelliteHostFactsCount(context_wrap(SATELLITE_HOST_FACTS_CONTENT))
+    assert len(host_facts) == 1
+    assert int(host_facts[0]['count']) == 12121