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Merge pull request #529 from arif-ali/ha_doc_update

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Update HA documentation
This commit is contained in:
Xiaopeng Wang 2016-01-14 05:38:53 -05:00
commit 2e8f66ff1f
1 changed files with 369 additions and 6 deletions
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docs/source/advanced/hamn/setup_ha_mgmt_node_with_drbd_pacemaker_corosync.rst
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@ -255,7 +255,7 @@ To avoid RPM dependency issues, it is recommended to use ``yum/zypper`` install
#. Put all of these RPM packages into a directory, for example ``/root/hamn/packages``
#. Add a new repository:
#. Add a new repository:
* **[RedHat]**: ::
@ -269,7 +269,7 @@ To avoid RPM dependency issues, it is recommended to use ``yum/zypper`` install
zypper ar file:///root/hamn/packages
#. Install the packages:
#. Install the packages:
* **[RedHat]**: ::
@ -556,6 +556,9 @@ Here is an example of the ``/xCATdrbd/etc/drbdlinks.xCAT.conf`` content, you mig
# ==== SSH ====
link('/etc/ssh')
link('/root/.ssh')
#
# ==== SystemImager ====
#link('/etc/systemimager')
``Note``: Make sure that none of the directories we have specified in the ``drbdlinks`` config are not mount points. If any of them are, we should a new mount point for them and edit ``/etc/fstab`` to use the new mount point.
@ -1035,7 +1038,7 @@ Correcting DRBD Differences (Optional)
It is possible that the data between the two sides of the DRBD mirror could be different in a few chunks of data, although these differences might be harmless, but it will be good if we could discover and fix these differences in time.
Add a crontab entry to check the differences
--------------------------------------------
--------------------------------------------
::
0 6 * * * /sbin/drbdadm verify all
@ -1179,7 +1182,7 @@ Trouble shooting and debug tips
Disable HA MN
=============
For whatever reason, the user might want to disable HA MN, here is the procedur of disabling HA MN:
For whatever reason, the user might want to disable HA MN, here is the procedur of disabling HA MN:
* Shut down standby management node
@ -1201,8 +1204,8 @@ If the HA MN configuration is still functioning, failover the primary management
ifconfig to see the current xcat interface before shutting down HA services go to ``/etc/ifconfig/network-scripts`` and create the new interface: ::
/etc/init.d/pacemaker stop
/etc/init.d/corosync stop
/etc/init.d/pacemaker stop
/etc/init.d/corosync stop
/etc/init.d/drbdlinksclean stop
With drbd on and with the filesystem mounted look at each link in ``/etc/drbdlinks.xCAT.conf`` for each link, remove the link if it is still linked,
@ -1220,6 +1223,30 @@ In our case, we handled the /install directory like this: ::
start services by hand ( or reboot ) nfs nfslock dhcpd postgresql httpd (apache) named conserver xcatd
Adding SystemImager support to HA
=================================
On each of the management nodes, we need to install ::
yum install systemimager-server
Then we need to enable the systemimage in pacemaker, first we need to grab the configuration from the current setup ::
pcs cluster cib xcat_cfg
Now we need add the relevant config to the ``xcat-cfg`` xml file ::
pcs -f xcat_cfg resource create systemimager_rsync_xCAT lsb:systemimager-server-rsyncd \
op monitor interval="37s"
pcs -f xcat_cfg constraint colocation add systemimager_rsync_xCAT grp_xCAT
pcs -f xcat_cfg constraint order grp_xCAT then systemimager_rsync_xCAT
Finally we commit the changes that are in xcat_cfg into the live system: ::
pcs cluster push cib xcat_cfg
We then need to make sure that the ``/xCATdrbd/etc/drbdlinks.xCAT.conf`` file has the systemimager portion uncommented, and re-do the initialisation of drbdlinks as they have been done earlier in the documentation
Appendix A
==========
@ -1530,4 +1557,340 @@ And the resulting output should be the following: ::
fs_xCAT (ocf::heartbeat:Filesystem): Started x3550m4n01
symlinks_xCAT (ocf::tummy:drbdlinks): Started x3550m4n01
Appendix C
==========
from RHEL 7, there more changes that we need to consider
yum -y install pcs
In order to do similar configs to corosync, that we need to apply to cman, is shown below. ::
pcs cluster setup --local --name xcat-cluster x3550m4n01 x3550m4n02 --force
As per Appendix A, a sample Pacemaker configuration through pcs on RHEL 7 is shown below; but there are some slight changes compared to RHEL 6.4 (So we need to keep these in mind). The commands below need to be run on the MN:
Create a file to queue up the changes, this creates a file with the current configuration into a file xcat_cfg: ::
pcs cluster cib xcat_cfg
We use the pcs -f option to make changes in the file, so this is not changing it live: ::
pcs -f xcat_cfg property set stonith-enabled=false
pcs -f xcat_cfg property set no-quorum-policy=ignore
pcs -f xcat_cfg resource op defaults timeout="120s"
pcs -f xcat_cfg resource create ip_xCAT ocf:heartbeat:IPaddr2 ip="10.1.0.1" \
iflabel="xCAT" cidr_netmask="24" nic="eno2"\
op monitor interval="37s"
pcs -f xcat-cfg resource create NFS_xCAT ocf:heartbeat:nfsserver nfs_shared_infodir=/var/lib/nfs \
rpcpipefs_dir=/var/lib/nfs_local/rpc_pipefs nfs_ip=10.12.0.221,10.12.0.222 \
op monitor interval="41s" start interval=10s timeout=20s
pcs -f xcat_cfg resource create apache_xCAT ocf:heartbeat:apache configfile="/etc/httpd/conf/httpd.conf" \
statusurl="http://127.0.0.1:80/icons/README.html" testregex="</html>" \
op monitor interval="57s"
pcs -f xcat_cfg resource create db_xCAT ocf:heartbeat:mysql config="/xCATdrbd/etc/my.cnf" test_user="mysql" \
binary="/usr/bin/mysqld_safe" pid="/var/run/mysqld/mysqld.pid" socket="/var/lib/mysql/mysql.sock" \
op monitor interval="57s"
pcs -f xcat_cfg resource create dhcpd systemd:dhcpd \
op monitor interval="37s"
pcs -f xcat_cfg resource create drbd_xCAT ocf:linbit:drbd drbd_resource=xCAT
pcs -f xcat_cfg resource master ms_drbd_xCAT drbd_xCAT master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
pcs -f xcat_cfg resource create dummy ocf:heartbeat:Dummy
pcs -f xcat_cfg resource create fs_xCAT ocf:heartbeat:Filesystem device="/dev/drbd/by-res/xCAT" directory="/xCATdrbd" fstype="ext4" \
op monitor interval="57s"
pcs -f xcat_cfg resource create named systemd:named \
op monitor interval="37s"
pcs -f xcat_cfg resource create symlinks_xCAT ocf:tummy:drbdlinks configfile="/xCATdrbd/etc/drbdlinks.xCAT.conf" \
op monitor interval="31s"
pcs -f xcat_cfg resource create xCAT lsb:xcatd \
op monitor interval="42s"
pcs -f xcat-cfg resource create xCAT_conserver lsb:conserver \
op monitor interval="53"
pcs -f xcat_cfg resource clone named clone-max=2 clone-node-max=1 notify=false
pcs -f xcat_cfg resource group add grp_xCAT fs_xCAT symlinks_xCAT
pcs -f xcat_cfg constraint colocation add NFS_xCAT grp_xCAT
pcs -f xcat_cfg constraint colocation add apache_xCAT grp_xCAT
pcs -f xcat_cfg constraint colocation add dhcpd grp_xCAT
pcs -f xcat_cfg constraint colocation add db_xCAT grp_xCAT
pcs -f xcat_cfg constraint colocation add dummy grp_xCAT
pcs -f xcat_cfg constraint colocation add xCAT grp_xCAT
pcs -f xcat-cfg constraint colocation add xCAT_conserver grp_xCAT
pcs -f xcat_cfg constraint colocation add grp_xCAT ms_drbd_xCAT INFINITY with-rsc-role=Master
pcs -f xcat_cfg constraint colocation add ip_xCAT ms_drbd_xCAT INFINITY with-rsc-role=Master
pcs -f xcat_cfg constraint order xCAT then dummy
pcs -f xcat_cfg constraint order apache_xCAT then dummy
pcs -f xcat_cfg constraint order dhcpd then dummy
pcs -f xcat_cfg constraint order db_xCAT then dummy
pcs -f xcat_cfg constraint order NFS_xCAT then dummy
pcs -f xcat-cfg constraint order xCAT_conserver then dummy
pcs -f xcat_cfg constraint order fs_xCAT then symlinks_xCAT
pcs -f xcat_cfg constraint order ip_xCAT then db_xCAT
pcs -f xcat_cfg constraint order ip_xCAT then apache_xCAT
pcs -f xcat_cfg constraint order ip_xCAT then dhcpd
pcs -f xcat-cfg constraint order ip_xCAT then xCAT_conserver
pcs -f xcat_cfg constraint order grp_xCAT then NFS_xCAT
pcs -f xcat_cfg constraint order grp_xCAT then apache_xCAT
pcs -f xcat_cfg constraint order grp_xCAT then db_xCAT
pcs -f xcat_cfg constraint order grp_xCAT then dhcpd
pcs -f xcat-cfg constraint order grp_xCAT then xCAT_conserver
pcs -f xcat_cfg constraint order db_xCAT then xCAT
pcs -f xcat_cfg constraint order promote ms_drbd_xCAT then start grp_xCAT
Finally we commit the changes that are in xcat_cfg into the live system: ::
pcs cluster cib-push xcat_cfg
Once the changes have been commited, we can view the config, by running the command below: ::
pcs config
which should result in the following output: ::
Cluster Name: xcat-cluster
Corosync Nodes:
x3550m4n01 x3550m4n02
Pacemaker Nodes:
x3550m4n01 x3550m4n02
Resources:
Resource: ip_xCAT (class=ocf provider=heartbeat type=IPaddr2)
Attributes: ip=10.1.0.1 iflabel=xCAT cidr_netmask=22 nic=eno2
Operations: start interval=0s timeout=20s (ip_xCAT-start-timeout-20s)
stop interval=0s timeout=20s (ip_xCAT-stop-timeout-20s)
monitor interval=37s (ip_xCAT-monitor-interval-37s)
Resource: NFS_xCAT (class=ocf provider=heartbeat type=nfsserver)
Attributes: nfs_shared_infodir=/xcatdrbd/var/lib/nfs rpcpipefs_dir=/var/lib/nfs_local/rpc_pipefs nfs_ip=10.12.0.221,10.12.0.222
Operations: start interval=10s timeout=20s (NFS_xCAT-start-interval-10s-timeout-20s)
stop interval=0s timeout=20s (NFS_xCAT-stop-timeout-20s)
monitor interval=41s (NFS_xCAT-monitor-interval-41s)
Resource: apache_xCAT (class=ocf provider=heartbeat type=apache)
Attributes: configfile=/etc/httpd/conf/httpd.conf statusurl=http://127.0.0.1:80/icons/README.html testregex=</html>
Operations: start interval=0s timeout=40s (apache_xCAT-start-timeout-40s)
stop interval=0s timeout=60s (apache_xCAT-stop-timeout-60s)
monitor interval=57s (apache_xCAT-monitor-interval-57s)
Resource: db_xCAT (class=ocf provider=heartbeat type=mysql)
Attributes: config=/xcatdrbd/etc/my.cnf test_user=mysql binary=/usr/bin/mysqld_safe pid=/var/run/mariadb/mariadb.pid socket=/var/lib/mysql/mysql.sock
Operations: start interval=0s timeout=120 (db_xCAT-start-timeout-120)
stop interval=0s timeout=120 (db_xCAT-stop-timeout-120)
promote interval=0s timeout=120 (db_xCAT-promote-timeout-120)
demote interval=0s timeout=120 (db_xCAT-demote-timeout-120)
monitor interval=57s (db_xCAT-monitor-interval-57s)
Resource: dhcpd (class=systemd type=dhcpd)
Operations: monitor interval=37s (dhcpd-monitor-interval-37s)
Resource: dummy (class=ocf provider=heartbeat type=Dummy)
Operations: start interval=0s timeout=20 (dummy-start-timeout-20)
stop interval=0s timeout=20 (dummy-stop-timeout-20)
monitor interval=10 timeout=20 (dummy-monitor-interval-10)
Master: ms_drbd_xCAT
Meta Attrs: master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true
Resource: drbd_xCAT (class=ocf provider=linbit type=drbd)
Attributes: drbd_resource=xCAT
Operations: start interval=0s timeout=240 (drbd_xCAT-start-timeout-240)
promote interval=0s timeout=90 (drbd_xCAT-promote-timeout-90)
demote interval=0s timeout=90 (drbd_xCAT-demote-timeout-90)
stop interval=0s timeout=100 (drbd_xCAT-stop-timeout-100)
monitor interval=20 role=Slave timeout=20 (drbd_xCAT-monitor-interval-20-role-Slave)
monitor interval=10 role=Master timeout=20 (drbd_xCAT-monitor-interval-10-role-Master)
Resource: xCAT (class=lsb type=xcatd)
Operations: monitor interval=42s (xCAT-monitor-interval-42s)
Resource: xCAT_conserver (class=lsb type=conserver)
Operations: monitor interval=53 (xCAT_conserver-monitor-interval-53)
Resource: gmetad (class=systemd type=gmetad)
Operations: monitor interval=57s (gmetad-monitor-interval-57s)
Resource: icinga (class=lsb type=icinga)
Operations: monitor interval=57s (icinga-monitor-interval-57s)
Clone: named-clone
Meta Attrs: clone-max=2 clone-node-max=1 notify=false
Resource: named (class=systemd type=named)
Operations: monitor interval=37s (named-monitor-interval-37s)
Group: grp_xCAT
Resource: fs_xCAT (class=ocf provider=heartbeat type=Filesystem)
Attributes: device=/dev/drbd/by-res/xCAT directory=/xcatdrbd fstype=xfs
Operations: start interval=0s timeout=60 (fs_xCAT-start-timeout-60)
stop interval=0s timeout=60 (fs_xCAT-stop-timeout-60)
monitor interval=57s (fs_xCAT-monitor-interval-57s)
Resource: symlinks_xCAT (class=ocf provider=tummy type=drbdlinks)
Attributes: configfile=/xcatdrbd/etc/drbdlinks.xCAT.conf
Operations: start interval=0s timeout=1m (symlinks_xCAT-start-timeout-1m)
stop interval=0s timeout=1m (symlinks_xCAT-stop-timeout-1m)
monitor interval=31s on-fail=ignore (symlinks_xCAT-monitor-interval-31s)
Stonith Devices:
Fencing Levels:
Location Constraints:
Ordering Constraints:
promote ms_drbd_xCAT then start grp_xCAT (kind:Mandatory) (id:order-ms_drbd_xCAT-grp_xCAT-mandatory)
start fs_xCAT then start symlinks_xCAT (kind:Mandatory) (id:order-fs_xCAT-symlinks_xCAT-mandatory)
start xCAT then start dummy (kind:Mandatory) (id:order-xCAT-dummy-mandatory)
start apache_xCAT then start dummy (kind:Mandatory) (id:order-apache_xCAT-dummy-mandatory)
start dhcpd then start dummy (kind:Mandatory) (id:order-dhcpd-dummy-mandatory)
start db_xCAT then start dummy (kind:Mandatory) (id:order-db_xCAT-dummy-mandatory)
start NFS_xCAT then start dummy (kind:Mandatory) (id:order-NFS_xCAT-dummy-mandatory)
start xCAT_conserver then start dummy (kind:Mandatory) (id:order-xCAT_conserver-dummy-mandatory)
start gmetad then start dummy (kind:Mandatory) (id:order-gmetad-dummy-mandatory)
start icinga then start dummy (kind:Mandatory) (id:order-icinga-dummy-mandatory)
start ip_xCAT then start db_xCAT (kind:Mandatory) (id:order-ip_xCAT-db_xCAT-mandatory)
start ip_xCAT then start apache_xCAT (kind:Mandatory) (id:order-ip_xCAT-apache_xCAT-mandatory)
start ip_xCAT then start dhcpd (kind:Mandatory) (id:order-ip_xCAT-dhcpd-mandatory)
start ip_xCAT then start xCAT_conserver (kind:Mandatory) (id:order-ip_xCAT-xCAT_conserver-mandatory)
start ip_xCAT then start named-clone (kind:Mandatory) (id:order-ip_xCAT-named-clone-mandatory)
start grp_xCAT then start NFS_xCAT (kind:Mandatory) (id:order-grp_xCAT-NFS_xCAT-mandatory)
start grp_xCAT then start apache_xCAT (kind:Mandatory) (id:order-grp_xCAT-apache_xCAT-mandatory)
start grp_xCAT then start db_xCAT (kind:Mandatory) (id:order-grp_xCAT-db_xCAT-mandatory)
start grp_xCAT then start dhcpd (kind:Mandatory) (id:order-grp_xCAT-dhcpd-mandatory)
start grp_xCAT then start gmetad (kind:Mandatory) (id:order-grp_xCAT-gmetad-mandatory)
start grp_xCAT then start icinga (kind:Mandatory) (id:order-grp_xCAT-icinga-mandatory)
start grp_xCAT then start xCAT_conserver (kind:Mandatory) (id:order-grp_xCAT-xCAT_conserver-mandatory)
start db_xCAT then start xCAT (kind:Mandatory) (id:order-db_xCAT-xCAT-mandatory)
Colocation Constraints:
grp_xCAT with ms_drbd_xCAT (score:INFINITY) (with-rsc-role:Master) (id:colocation-grp_xCAT-ms_drbd_xCAT-INFINITY)
ip_xCAT with ms_drbd_xCAT (score:INFINITY) (with-rsc-role:Master) (id:colocation-ip_xCAT-ms_drbd_xCAT-INFINITY)
NFS_xCAT with grp_xCAT (score:INFINITY) (id:colocation-NFS_xCAT-grp_xCAT-INFINITY)
apache_xCAT with grp_xCAT (score:INFINITY) (id:colocation-apache_xCAT-grp_xCAT-INFINITY)
dhcpd with grp_xCAT (score:INFINITY) (id:colocation-dhcpd-grp_xCAT-INFINITY)
db_xCAT with grp_xCAT (score:INFINITY) (id:colocation-db_xCAT-grp_xCAT-INFINITY)
dummy with grp_xCAT (score:INFINITY) (id:colocation-dummy-grp_xCAT-INFINITY)
xCAT with grp_xCAT (score:INFINITY) (id:colocation-xCAT-grp_xCAT-INFINITY)
xCAT_conserver with grp_xCAT (score:INFINITY) (id:colocation-xCAT_conserver-grp_xCAT-INFINITY)
gmetad with grp_xCAT (score:INFINITY) (id:colocation-gmetad-grp_xCAT-INFINITY)
icinga with grp_xCAT (score:INFINITY) (id:colocation-icinga-grp_xCAT-INFINITY)
ip_xCAT with grp_xCAT (score:INFINITY) (id:colocation-ip_xCAT-grp_xCAT-INFINITY)
Cluster Properties:
cluster-infrastructure: corosync
cluster-name: ucl_cluster
dc-version: 1.1.12-a14efad
have-watchdog: false
last-lrm-refresh: 1445963044
no-quorum-policy: ignore
stonith-enabled: false
Then we can check the status of the cluster by running the following command: ::
pcs status
And the resulting output should be the following: ::
Cluster name: xcat-cluster
Last updated: Wed Oct 28 09:59:25 2015
Last change: Tue Oct 27 16:24:04 2015
Stack: corosync
Current DC: x3550m4n01 (1) - partition with quorum
Version: 1.1.12-a14efad
2 Nodes configured
17 Resources configured
Online: [ x3550m4n01 x3550m4n02 ]
Full list of resources:
ip_xCAT (ocf::heartbeat:IPaddr2): Started x3550m4n01
NFS_xCAT (ocf::heartbeat:nfsserver): Started x3550m4n01
apache_xCAT (ocf::heartbeat:apache): Started x3550m4n01
db_xCAT (ocf::heartbeat:mysql): Started x3550m4n01
dhcpd (systemd:dhcpd): Started x3550m4n01
dummy (ocf::heartbeat:Dummy): Started x3550m4n01
Master/Slave Set: ms_drbd_xCAT [drbd_xCAT]
Masters: [ x3550m4n01 ]
Slaves: [ x3550m4n02 ]
xCAT (lsb:xcatd): Started x3550m4n01
xCAT_conserver (lsb:conserver): Started x3550m4n01
Clone Set: named-clone [named]
Started: [ x3550m4n01r x3550m4n02 ]
Resource Group: grp_xCAT
fs_xCAT (ocf::heartbeat:Filesystem): Started x3550m4n01
symlinks_xCAT (ocf::tummy:drbdlinks): Started x3550m4n01
PCSD Status:
x3550m4n01: Online
x3550m4n02: Online
Daemon Status:
corosync: active/disabled
pacemaker: active/disabled
pcsd: active/enabled
Further from this, the following changes needed to be made for nfs in el7 ::
cat > /etc/systemd/system/var-lib-nfs_local-rpc_pipefs.mount << EOF
[Unit]
Description=RPC Pipe File System
DefaultDependencies=no
Conflicts=umount.target
[Mount]
What=sunrpc
Where=/var/lib/nfs_local/rpc_pipefs
Type=rpc_pipefs
EOF
--- /usr/lib/systemd/system/rpc-svcgssd.service 2015-01-23 16:30:26.000000000 +0000
+++ /etc/systemd/system/rpc-svcgssd.service 2015-10-13 01:39:36.000000000 +0100
@@ -1,7 +1,7 @@
[Unit]
Description=RPC security service for NFS server
-Requires=var-lib-nfs-rpc_pipefs.mount
-After=var-lib-nfs-rpc_pipefs.mount
+Requires=var-lib-nfs_local-rpc_pipefs.mount
+After=var-lib-nfs_local-rpc_pipefs.mount
PartOf=nfs-server.service
PartOf=nfs-utils.service
--- /usr/lib/systemd/system/rpc-gssd.service 2015-01-23 16:30:26.000000000 +0000
+++ /etc/systemd/system/rpc-gssd.service 2015-10-13 01:39:36.000000000 +0100
@@ -2,8 +2,8 @@
Description=RPC security service for NFS client and server
DefaultDependencies=no
Conflicts=umount.target
-Requires=var-lib-nfs-rpc_pipefs.mount
-After=var-lib-nfs-rpc_pipefs.mount
+Requires=var-lib-nfs_local-rpc_pipefs.mount
+After=var-lib-nfs_local-rpc_pipefs.mount
ConditionPathExists=/etc/krb5.keytab
--- /usr/lib/systemd/system/nfs-secure.service 2015-01-23 16:30:26.000000000 +0000
+++ /etc/systemd/system/nfs-secure.service 2015-10-13 01:39:36.000000000 +0100
@@ -2,8 +2,8 @@
Description=RPC security service for NFS client and server
DefaultDependencies=no
Conflicts=umount.target
-Requires=var-lib-nfs-rpc_pipefs.mount
-After=var-lib-nfs-rpc_pipefs.mount
+Requires=var-lib-nfs_local-rpc_pipefs.mount
+After=var-lib-nfs_local-rpc_pipefs.mount
ConditionPathExists=/etc/krb5.keytab
--- /usr/lib/systemd/system/nfs-secure-server.service 2015-01-23 16:30:26.000000000 +0000
+++ /etc/systemd/system/nfs-secure-server.service 2015-10-13 01:39:36.000000000 +0100
@@ -1,7 +1,7 @@
[Unit]
Description=RPC security service for NFS server
-Requires=var-lib-nfs-rpc_pipefs.mount
-After=var-lib-nfs-rpc_pipefs.mount
+Requires=var-lib-nfs_local-rpc_pipefs.mount
+After=var-lib-nfs_local-rpc_pipefs.mount
PartOf=nfs-server.service
PartOf=nfs-utils.service
--- /usr/lib/systemd/system/nfs-blkmap.service 2015-01-23 16:30:26.000000000 +0000
+++ /etc/systemd/system/nfs-blkmap.service 2015-10-13 01:39:36.000000000 +0100
@@ -2,8 +2,8 @@
Description=pNFS block layout mapping daemon
DefaultDependencies=no
Conflicts=umount.target
-After=var-lib-nfs-rpc_pipefs.mount
-Requires=var-lib-nfs-rpc_pipefs.mount
+After=var-lib-nfs_local-rpc_pipefs.mount
+Requires=var-lib-nfs_local-rpc_pipefs.mount
Requisite=nfs-blkmap.target
After=nfs-blkmap.target