cephadm: move logrotate config to jinja2 template

This moves both the cluster and cephadm logrotate
configs into jinja2 templates. It looks a bit silly
right now to have the cephadm one in a template given
it has no variables, but it may allow us to implement
custom cephadm log logrotate configs later down
the line

Signed-off-by: Adam King <[email protected]>

Author: adk3798

src/cephadm/cephadm.py

@@ -147,7 +147,12 @@
 from cephadmlib.locking import FileLock
 from cephadmlib.daemon_identity import DaemonIdentity, DaemonSubIdentity
 from cephadmlib.packagers import create_packager, Packager
-from cephadmlib.logging import cephadm_init_logging, Highlight, LogDestination
+from cephadmlib.logging import (
+    cephadm_init_logging,
+    Highlight,
+    LogDestination,
+    write_cluster_logrotate_config,
+)
 from cephadmlib.systemd import check_unit, check_units
 from cephadmlib.container_types import (
     CephContainer,
@@ -3419,42 +3424,7 @@ def install_base_units(ctx, fsid):
     if os.path.exists(ctx.logrotate_dir + f'/ceph-{fsid}'):
         return
 
-    # logrotate for the cluster
-    with write_new(ctx.logrotate_dir + f'/ceph-{fsid}', perms=None) as f:
-        """
-        This is a bit sloppy in that the killall/pkill will touch all ceph daemons
-        in all containers, but I don't see an elegant way to send SIGHUP *just* to
-        the daemons for this cluster.  (1) systemd kill -s will get the signal to
-        podman, but podman will exit.  (2) podman kill will get the signal to the
-        first child (bash), but that isn't the ceph daemon.  This is simpler and
-        should be harmless.
-        """
-        targets: List[str] = [
-            'ceph-mon',
-            'ceph-mgr',
-            'ceph-mds',
-            'ceph-osd',
-            'ceph-fuse',
-            'radosgw',
-            'rbd-mirror',
-            'cephfs-mirror',
-            'tcmu-runner'
-        ]
-
-        f.write("""# created by cephadm
-/var/log/ceph/%s/*.log {
-    rotate 7
-    daily
-    compress
-    sharedscripts
-    postrotate
-        killall -q -1 %s || pkill -1 -x '%s' || true
-    endscript
-    missingok
-    notifempty
-    su root root
-}
-""" % (fsid, ' '.join(targets), '|'.join(targets)))
+    write_cluster_logrotate_config(ctx, fsid)
 
 
 def get_unit_file(ctx: CephadmContext, fsid: str) -> str:

src/cephadm/cephadmlib/logging.py

@@ -12,6 +12,10 @@
 from .context import CephadmContext
 from .constants import QUIET_LOG_LEVEL, LOG_DIR
 
+from cephadmlib.file_utils import write_new
+
+from cephadmlib import templating
+
 
 class _ExcludeErrorsFilter(logging.Filter):
     def filter(self, record: logging.LogRecord) -> bool:
@@ -145,18 +149,6 @@ def format(self, record: Any) -> str:
 }
 
 
-_logrotate_data = """# created by cephadm
-/var/log/ceph/cephadm.log {
-    rotate 7
-    daily
-    compress
-    missingok
-    notifempty
-    su root root
-}
-"""
-
-
 _VERBOSE_HANDLERS = [
     'console',
     'console_stdout',
@@ -222,9 +214,7 @@ def cephadm_init_logging(
 
     logger.setLevel(QUIET_LOG_LEVEL)
 
-    if not os.path.exists(ctx.logrotate_dir + '/cephadm'):
-        with open(ctx.logrotate_dir + '/cephadm', 'w') as f:
-            f.write(_logrotate_data)
+    write_cephadm_logrotate_config(ctx)
 
     for handler in logger.handlers:
         # the following little hack ensures that no matter how cephadm is named
@@ -239,3 +229,48 @@ def cephadm_init_logging(
         if ctx.verbose and handler.name in _VERBOSE_HANDLERS:
             handler.setLevel(QUIET_LOG_LEVEL)
     logger.debug('%s\ncephadm %s' % ('-' * 80, args))
+
+
+def write_cephadm_logrotate_config(ctx: CephadmContext) -> None:
+    if not os.path.exists(ctx.logrotate_dir + '/cephadm'):
+        with open(ctx.logrotate_dir + '/cephadm', 'w') as f:
+            cephadm_logrotate_config = templating.render(
+                ctx, templating.Templates.cephadm_logrotate_config
+            )
+            f.write(cephadm_logrotate_config)
+
+
+def write_cluster_logrotate_config(ctx: CephadmContext, fsid: str) -> None:
+    # logrotate for the cluster
+    with write_new(ctx.logrotate_dir + f'/ceph-{fsid}', perms=None) as f:
+        """
+        See cephadm/cephadmlib/templates/cluster.logrotate.config.j2 to
+        get a better idea what this comment is referring to
+
+        This is a bit sloppy in that the killall/pkill will touch all ceph daemons
+        in all containers, but I don't see an elegant way to send SIGHUP *just* to
+        the daemons for this cluster.  (1) systemd kill -s will get the signal to
+        podman, but podman will exit.  (2) podman kill will get the signal to the
+        first child (bash), but that isn't the ceph daemon.  This is simpler and
+        should be harmless.
+        """
+        targets: List[str] = [
+            'ceph-mon',
+            'ceph-mgr',
+            'ceph-mds',
+            'ceph-osd',
+            'ceph-fuse',
+            'radosgw',
+            'rbd-mirror',
+            'cephfs-mirror',
+            'tcmu-runner',
+        ]
+
+        logrotate_config = templating.render(
+            ctx,
+            templating.Templates.cluster_logrotate_config,
+            fsid=fsid,
+            targets=targets,
+        )
+
+        f.write(logrotate_config)

src/cephadm/cephadmlib/templates/cephadm.logrotate.config.j2

@@ -0,0 +1,9 @@
+# created by cephadm
+/var/log/ceph/cephadm.log {
+    rotate 7
+    daily
+    compress
+    missingok
+    notifempty
+    su root root
+}

src/cephadm/cephadmlib/templates/cluster.logrotate.config.j2

@@ -0,0 +1,13 @@
+# created by cephadm
+/var/log/ceph/{{ fsid }}/*.log {
+    rotate 7
+    daily
+    compress
+    sharedscripts
+    postrotate
+        killall -q -1 {{ targets|join(' ') }} || pkill -1 -x '{{ targets|join('|') }}' || true
+    endscript
+    missingok
+    notifempty
+    su root root
+}

src/cephadm/cephadmlib/templating.py

@@ -17,6 +17,8 @@ class Templates(str, enum.Enum):
 
     ceph_service = 'ceph.service.j2'
     agent_service = 'agent.service.j2'
+    cluster_logrotate_config = 'cluster.logrotate.config.j2'
+    cephadm_logrotate_config = 'cephadm.logrotate.config.j2'
 
     def __str__(self) -> str:
         return self.value

src/cephadm/tests/test_logrotate_config.py

@@ -0,0 +1,57 @@
+from unittest import mock
+
+import pytest
+
+from tests.fixtures import import_cephadm, cephadm_fs
+
+from cephadmlib import logging
+
+
+_cephadm = import_cephadm()
+
+def test_cluster_logrotate_config(cephadm_fs):
+    ctx = _cephadm.CephadmContext()
+    ctx.logrotate_dir = '/my/log/dir'
+    fsid = '5dcc9af0-7cd3-11ee-9e84-525400babd0a'
+
+    cephadm_fs.create_dir(ctx.logrotate_dir)
+
+    expected_cluster_logrotate_file = """# created by cephadm
+/var/log/ceph/5dcc9af0-7cd3-11ee-9e84-525400babd0a/*.log {
+    rotate 7
+    daily
+    compress
+    sharedscripts
+    postrotate
+        killall -q -1 ceph-mon ceph-mgr ceph-mds ceph-osd ceph-fuse radosgw rbd-mirror cephfs-mirror tcmu-runner || pkill -1 -x 'ceph-mon|ceph-mgr|ceph-mds|ceph-osd|ceph-fuse|radosgw|rbd-mirror|cephfs-mirror|tcmu-runner' || true
+    endscript
+    missingok
+    notifempty
+    su root root
+}"""
+
+    logging.write_cluster_logrotate_config(ctx, fsid)
+
+    with open(ctx.logrotate_dir + f'/ceph-{fsid}', 'r') as f:
+        assert f.read() == expected_cluster_logrotate_file
+
+def test_cephadm_logrotate_config(cephadm_fs):
+    ctx = _cephadm.CephadmContext()
+    ctx.logrotate_dir = '/my/log/dir'
+
+    cephadm_fs.create_dir(ctx.logrotate_dir)
+
+    expected_cephadm_logrotate_file = """# created by cephadm
+/var/log/ceph/cephadm.log {
+    rotate 7
+    daily
+    compress
+    missingok
+    notifempty
+    su root root
+}"""
+
+    logging.write_cephadm_logrotate_config(ctx)
+
+    with open(ctx.logrotate_dir + f'/cephadm', 'r') as f:
+        assert f.read() == expected_cephadm_logrotate_file