$ oc logs collector-2t8z5 
Defaulted container "collector" out of: collector, logfilesmetricexporter
POD_IPS: 10.131.0.32, PROM_BIND_IP: 0.0.0.0
Setting each total_size_limit for 3 buffers to 6841695232 bytes
Setting queued_chunks_limit_size for each buffer to 815
Setting chunk_limit_size for each buffer to 8388608
/var/lib/fluentd/pos/journal_pos.json exists, checking if yajl parser able to parse this json file without any error.
ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [x86_64-linux]
RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=0.900000 (default value: 2.000000)
checking if /var/lib/fluentd/pos/journal_pos.json a valid json by calling yajl parser
2023-03-22 02:16:06 +0000 [warn]: '@' is the system reserved prefix. It works in the nested configuration for now but it will be rejected: @timestamp
2023-03-22 02:16:06 +0000 [warn]: '@' is the system reserved prefix. It works in the nested configuration for now but it will be rejected: @timestamp
/usr/local/share/gems/gems/fluent-plugin-elasticsearch-5.2.2/lib/fluent/plugin/elasticsearch_compat.rb:8: warning: already initialized constant TRANSPORT_CLASS
/usr/local/share/gems/gems/fluent-plugin-elasticsearch-5.2.2/lib/fluent/plugin/elasticsearch_compat.rb:3: warning: previous definition of TRANSPORT_CLASS was here
/usr/local/share/gems/gems/fluent-plugin-elasticsearch-5.2.2/lib/fluent/plugin/elasticsearch_compat.rb:25: warning: already initialized constant SELECTOR_CLASS
/usr/local/share/gems/gems/fluent-plugin-elasticsearch-5.2.2/lib/fluent/plugin/elasticsearch_compat.rb:20: warning: previous definition of SELECTOR_CLASS was here
2023-03-22 02:16:08 +0000 [warn]: For security reason, setting private_key_passphrase is recommended when cert_path is specified 

$ oc logs -c collector collector-lq9xz 
2023-03-22T02:39:38.982492Z  WARN vector::config::loading: Transform "route_container_logs._unmatched" has no consumers
Journal file /var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal uses an unsupported feature, ignoring file.
Use SYSTEMD_LOG_LEVEL=debug journalctl --file=/var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal to see the details.
Data from the specified boot (+0) is not available: No such boot ID in journal
2023-03-22T02:39:39.048312Z  WARN source{component_kind="source" component_id=raw_journal_logs component_type=journald component_name=raw_journal_logs}: vector::sources::journald: Journalctl process stopped.
......
Journal file /var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal uses an unsupported feature, ignoring file.
Use SYSTEMD_LOG_LEVEL=debug journalctl --file=/var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal to see the details.
Data from the specified boot (+0) is not available: No such boot ID in journal
2023-03-22T02:42:34.197493Z  WARN source{component_kind="source" component_id=raw_journal_logs component_type=journald component_name=raw_journal_logs}: vector::sources::journald: Journalctl process stopped.

$ oc rsh collector-lq9xz
Defaulted container "collector" out of: collector, logfilesmetricexporter
sh-4.4# SYSTEMD_LOG_LEVEL=debug journalctl --file=/var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal
Journal effective settings seal=no compress=no compress_threshold_bytes=8B
Journal file /var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal has unknown incompatible flags 0x1c
Failed to open journal file /var/log/journal/ec23f73e7f0fbe1a217e0f0640844695/system.journal: Protocol not supported
mmap cache statistics: 0 hit, 1 miss
Failed to open files: Protocol not supported
sh-4.4# ls -Rl /var/log/journal/
/var/log/journal/:
total 0
drwxr-sr-x+ 2 root systemd-journal 28 Mar 22 00:02 ec23f73e7f0fbe1a217e0f0640844695


/var/log/journal/ec23f73e7f0fbe1a217e0f0640844695:
total 16388
-rw-r-----+ 1 root systemd-journal 16777216 Mar 22 03:12 system.journal
sh-4.4# id
uid=0(root) gid=0(root) groups=0(root) 

$ oc debug nodes/qe-daily-413-0322-4sdbs-worker-westus-7lskh
sh-4.4# chroot /host
sh-5.1# cat /etc/redhat-release 
CentOS Stream CoreOS release 4.13
sh-5.1# cat /etc/os-release     
NAME="CentOS Stream CoreOS"
ID="rhcos"
ID_LIKE="rhel fedora"
VERSION="413.92.202303190222-0"
VERSION_ID="4.13"
VARIANT="CoreOS"
VARIANT_ID=coreos
PLATFORM_ID="platform:el9"
PRETTY_NAME="CentOS Stream CoreOS 413.92.202303190222-0 (Plow)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:9coreos"
HOME_URL="https://centos.org/"
DOCUMENTATION_URL="https://docs.openshift.com/container-platform/4.13/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="OpenShift Container Platform"
REDHAT_BUGZILLA_PRODUCT_VERSION="4.13"
REDHAT_SUPPORT_PRODUCT="OpenShift Container Platform"
REDHAT_SUPPORT_PRODUCT_VERSION="4.13"
OPENSHIFT_VERSION="4.13"
RHEL_VERSION="9"
OSTREE_VERSION="413.92.202303190222-0"