As many as you know I'm currently revamping Ubuntu High Availability
Packages
For 20.04, considered HA (or HA related) packages are:
- Core packages:
- libqb
- kronosnet
- corosync
- pacemaker
- resource-agents
- fence-agents
- crmsh
- cluster-glue
- drbd-utils
- dlm
- gfs2-utils
- "Deprecated" packages:
- heartbeat
- keepalived
- ocfs2-tools
- Not in "main" packages:
- pcs (will likely replace crmsh in near future)
- csync2
- corosync-qdevice
- fence-virt
- sbd
- booth
- Related packages:
- multipath-tools
- open-iscsi
- sg3-utils
- targetcli-fb
- tgt (we're trying to deprecate in favor of LIO)
- lvm2
For now, until Beta Freeze, we've been trying to catch up with upstream
latest
releases and, from now on, I'm going through existing opened bugs and
addressing
them with latest fixes (from upstream) + any needed fix to address the bugs
(done to kronosnet, with FFE opened, and corosync, about to merge fixes to
it).
Next step is to document in Server Guide all supported scenarios for HA
related
packages. The intention here is to describe exact set of scenarios that we
know
are good for the perfect behavior of clustering software AND which scenarios
we
cannot support.
OBS: This includes the need, or not, to have odd number of nodes/votes, to
have
or not proper fencing mechanisms (and which fencing mechanisms to support)
AND,
finally, what *resource agents* to support.
I'll probably ask other feedback soon, but, for this moment, I'm asking
comments
for the list of resource agents bellow. I tried to split and explain what
the
resources are used for and if they are supported in Ubuntu or not (or if the
related managed service is in [main] or in [universe]).
So please, take some time to provide feedback about this list, whether we
should
move resources from one category to the other. *NOTE* that I'm not giving
the
"fence agents" list yet. That will be another list.
I'm particularly interested in feedback from @jamespage and @ddstreet as
they
probably have good intel about resources usage BUT anyone is welcome to
provide
comments!
Thank you very much in advance!
#### RFC: Ubuntu HA resource-agents supportability
#
## FULLY SUPPORTED (managed service is likely in main or is important
enough)
#
# trivial agents
Delay - test resource for introducing delay
MailTo - sends email to a sysadmin whenever a takeover
occurs
ClusterMon - runs crm_mon to a html page from time to time
HealthCPU - measures CPU idling and updates #health-cpu attr
HealthIOWait - measures CPU idling and updates #health-iowait
attr
HealthSMART - measures CPU idling and updates #health-smart attr
# services
apache - apache web server instance
dovecot - dovecot IMAP/POP3 server instance
dhcpd - chrooted ISC dhcp server instance
mysql - MySQL database instance
mysql-proxy - MySQL proxy instance
named - bind/named server instance
nfsnotify - nfs sm-notify reboot notifications daemon
nfsserver - nfs server resource
nginx - Nginx web/proxy server instance
postfix - postfix mail server instance
rabbitmq-cluster - cloned rabbitmq cluster instance
remote - pacemaker remote resource agent
rsyncd - rsyncd instance
rsyslog - rsyslogd instance
slapd - stand-alone LDAP daemon instance
Squid - squid proxy server instance
vsftpd - vsftpd server instance
# storage
Raid1 - software RAID (MD) devices on shared storage
iscsi - local iscsi initiator and its conns to targets
iSCSILogicalUnit - iSCSI logical units
iSCSITarget - iSCSI target export agent (implementation: tgt,
lio)
LVM - LVM volume as an HA resource
LVM-activate - LVM activation/deact work for a given VG
(lvmlockd+LVM-activate OR clvm+LVM-activate)
Filesystem - filesystem on a shared storage medium
symlink - symbolic link
ZFS - ZFS pools import/export
# locking & reservations
controld - distributed lock manager for clustered FSs
clvm - clvmd daemon (cluster logical vol manager)
lvmlockd - agent manages the lvmlockd daemon.
mpathpersist - SCSI persistent reservations on mpath devs
sg_persist - master/slave resource for SCSI3 reservations
# networking
Route - network routes
iface-bridge - bridge network interfaces
iface-vlan - vlan network interfaces
IPaddr2 - virtual IPv4 and IPv6 addresses
ipsec - ipsec tunnels for VIPs
IPsrcaddr - preferred source address modification
IPv6addr - IPv6 aliases
conntrackd - conntrackd instance
SendArp - send gratuitous ARP for IP address
VIPArip - virtual IP address through RIP2
ifspeed - monitor action runs -> updates CIB with if speed
# virtualization
VirtualDomain - manages virtual domains through libvirt
(virtual machine only)
# containers
docker - docker container resource agent
lxc - allows LXC containers to be managed by the cluster
#
## BEST EFFORT SUPPORT (managed service is likely in universe or is
interesting)
#
# trivial agents
anything - generic agent to manage virtually *anything*
Dummy - testing dummy resource agent (template for RA
writers)
AudibleAlarm - audible beeps at interval
Stateful - example agent that supports two states
WinPopup - sends a SMB notification msg (popup) to a host
# services
asterisk - asterisk PBX
CTDB - clustered samba (for needed clustered underlying)
dnsupdate - ip take-over via dynamic dns updates
exportfs - nfs exports (not the nfs server)
fio - fio instance
galera - galera instance
garbd - galera arbitrator instance
jboss - JBoss application server instance
jira - JIRA server instance
kamailio - kamailio SIP proxy/registrar instance
mariadb - MariaDB master/slave instance
nagios - nagios instance
ovsmonitor - clone resource to monitor network bonds on diff
nodes
pgagent - pgagent instance
pgsql - pgsql database instance
pound - pound reverse proxy load-bal server instance
proftpd - proftpd instance
Pure-FTPd - pure-ftpd instance
redis - redis server (supports master/slave replicas)
instance
syslog-ng - syslog-ng instance
tomcat - tomcat servlet environment instance
varnish - varnish instance
# storage
AoEtarget - ata over ethernet
# networking
IPaddr - virtual IPv4 addresses
ocf:pacemaker:ping - records in CIB number of nodes host can connect to
portblock - temporarily block/unblock access to tcp/udp ports
# openstack
openstack-cinder-volume - attach cinder vol to an instance (os-info <->)
openstack-floating-ip - move a floating IP from an instance to another
# registration (CIB)
lxd-info - nr of lxd containers running in CIB
machine-info - records various node attributes in CIB
NodeUtilization - cpu, host mem, hypervisor mem etc... into CIB
openstack-info - records attributes of a node into CIB
SysInfo - records various node attributes into CIB
SystemHealth - monitors health of system using IPMI
attribute - sets node attr one way when started and vice-versa
#
## COMMUNITY SUPPORT (bugs opened here will be forwarded to upstream
directly)
#
# services
SphinxSearchDaemon - sphix search daemon
Xinetd - start/stop services managed by xinetd
zabbixserver - zabbix server instance
# storage
o2cb - oracle cluster filesystem userspace daemon
(oracle)
sfex - excl access to shared storage using SF-EX
# virtualization
aliyun-vpc-move-ip - move ip within a vpc of the aliyum ecs (alibaba)
awseip - manages aws elastic IP address (aws)
awsvip - manages aws secondary private ip addresses (aws)
aws-vpc-move-ip - move ip within a vpc of the aws ec2 (aws)
aws-vpc-route53 - update route53 vpc record for aws ec2 (aws)
azure-events - monitor for scheduled events for azure vm (azure)
azure-lb - answers azure load balancer health probe req
(azure)
gcp-vpc-move-ip - floating ip address within a GCP VPC (google)
ManageVE - openVZ virtual environment (virtuozzo)
minio - minio server instance
podman - creates/launches podman containers
rkt - creates/launches container based on supplied image
#
## UNSUPPORTED (Ubuntu does not support it)
#
db2 - manages IBM DB2 LUW databases (IBM)
eDir88 - Novell eDirectory directory server instance
(novell)
ICP - ICP vortex clustered host drive (intel)
ids - IBM informix dynamic server (IDS) (IBM)
SAPDatabase - SAP database (of any type) instance agent (SAP)
SAPInstance - SAP application server instances agent (SAP)
ServeRAID - enables/disables shared serveRAID merge groups
(IBM)
ManageRAID - raid devices (/etc/conf.d/HB-ManageRAID)
oraasm - oracle asm agent, uses ohasd for asm disk grp
(oracle)
oracle - oracle database instance (oracle)
oralsnr - oracle TNS listener (oracle)
sybaseASE - sybase ASE failover instance (Sybase)
vdo-vol - https://bugs.launchpad.net/ubuntu/+bug/1869825
WAS - websphere application server instance (IBM)
WAS6 - websphere application server instance (IBM)
Xen - xen unprivileged domains
#
## DEPRECATED (do not use)
#
Evmsd - clustered evms vol mgmt (evms is not maintained)
EvmsSCC - clustered evms vol mgmt (evms is not maintained)
LinuxSCSI - enables/disables scsi devs through kernel scsi
hotplug
scsi2reservation - SCSI-2 reservation agent (depends on
"scsi_reserve")
ocf:heartbeat:pingd - monitors connectivity to specific hosts
ocf:pacemaker:pingd - replaced by pacemaker:ping (this is broken)
vmware - control vmware server 2.0 virtual machines (2009)
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