After a reboot of a physical test server, two out of 5 Linux Containers (LXC) didn't start up automatically anymore.
When I manually tried to start them, I got the following error:
lxc-start: command get_cgroup failed to receive response
Although my research on the web pointed me to an Apparmor bug (Ubuntu bug #1295774), I could rule this bug out because the "fixed" Apparmor version was already installed:
dpkg -l | grep appa
ii apparmor 2.8.95~2430-0ubuntu5 amd64 User-space parser utility for AppArmor
ii libapparmor-perl 2.8.95~2430-0ubuntu5 amd64 AppArmor library Perl bindings
ii libapparmor1:amd64 2.8.95~2430-0ubuntu5 amd64 changehat AppArmor library
Interestingly, as I mentioned at the begin, other LXC's were started without problem. I checked out the config files and found a difference that the started containers were using the direct path of a logical volume (LV) as rootfs while the other two (which didn't start) were using a directory path.
Turns out... this path was not mounted (I forgot the entry in /etc/fstab). ^^
After mounting the LV's to the expected path, lxc-start worked fine.
So the error message "get_cgroup failed to receive response" can also appear if the rootfs is missing or not mounted.
No comments yet.
AWS Android Ansible Apache Apple Atlassian BSD Backup Bash Bluecoat CMS Chef Cloud Coding Consul Container Containers CouchDB DB DNS Database Databases Docker ELK ElasticSearch Elasticsearch Filebeat FreeBSD GlusterFS Grafana Graphics HAProxy HTML Hacks Hardware Icinga Icingaweb2 InfluxDB Internet Java KVM Kibana Kubernetes LXC Linux Logstash Mac Macintosh Mail MariaDB Minio MongoDB Monitoring Multimedia MySQL NFS Nagios Network Nginx OSSEC OTRS PGSQL PHP Perl Personal PostgreSQL Postgres PowerDNS Proxmox Proxy Python Rancher SSL Security Shell SmartOS Solaris Surveillance SystemD TLS Tomcat Ubuntu Unix VMWare VMware Varnish Virtualization Windows Wireless Wordpress Wyse ZFS Zoneminder