Openstack - Error While resizing the instance

Error While resizing the instance

=========
2014-08-12 09:38:08.449 13602 WARNING nova.scheduler.utils [req-7cf9b53a-24ed-46e7-adce-6c5e83c2839b 2ca1137e67d741e0839e67e
4959a8eea 8c9fb6577a1e45879f35e3e43b34de58] Failed to compute_task_migrate_server: No valid host was found.
=========
Solution

make sure following settings are enables in all the nova.conf

"allow_resize_to_same_host=true"
"allow_migrate_to_same_host=true"

After enabling it reboot all the openstack services and try the resizing from dashboard

We will be asked for an conformation for resizing, if we don't select any option resizing will fail

By command promt
[root@controller1 ~]# nova list
+--------------------------------------+------------------+--------+------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------------------+--------+------------+-------------+-------------------+
| 0c86c7bd-e815-4616-9c01-30cb8eb09414 | Test Instance 00 | ACTIVE | - | Running | demo-net=10.0.0.9 |
+--------------------------------------+------------------+--------+------------+-------------+-------------------+

List the available flavors with the following command:

$ nova flavor-list
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1 | m1.tiny | 512 | 0 | 0 | | 1 | 1.0 | True |
| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
To resize the server, pass the server ID or name and the new flavor to the nova resize command. Include the --poll parameter to report the resize progress.

$ nova resize myCirrosServer 4 --poll
Instance resizing... 100% complete
Finished
Show the status for your server:

$ nova list

[root@controller1 ~]# nova list
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+
| 0c86c7bd-e815-4616-9c01-30cb8eb09414 | Test Instance 00 | RESIZE | resize_migrating | Running | demo-net=10.0.0.9 |
+--------------------------------------+------------------+--------+------------------+-------------+-------------------+

When the resize completes, the status becomes VERIFY_RESIZE.

Confirm the resize:

$ nova resize-confirm 0c86c7bd-e815-4616-9c01-30cb8eb094145
The server status becomes ACTIVE.

If the resize fails or does not work as expected, you can revert the resize:

$ nova resize-revert 0c86c7bd-e815-4616-9c01-30cb8eb09414
The server status becomes ACTIVE.

Yum error :[Errno 14] Peer cert cannot be verified or peer cert invalid

In my case the above certificate error was because of worng time in the server . Once  I installed ntp and updated the time it started working fine.

yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
Error: Cannot retrieve repository metadata (repomd.xml) for repository: epel. Please verify its path and try again
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirror.net.cen.ct.gov
* extras: mirror.fdcservers.net
* updates: mirror.solarvps.com
base | 3.7 kB 00:00
base/primary_db | 4.4 MB 00:01
extras | 3.4 kB 00:00
extras/primary_db | 19 kB 00:00
foreman | 2.9 kB 00:00
foreman/primary_db | 77 kB 00:00
foreman-plugins | 2.9 kB 00:00
foreman-plugins/primary_db | 26 kB 00:00
http://repos.fedorapeople.org/repos/openstack/openstack-icehouse/epel-6/repodata/repomd.xml: [Errno 14] Peer cert cannot be verified or peer cert invalid
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: openstack-icehouse. Please verify its path and try again

Iscsi Intiator + Multipath

Install the Packages

yum -y install iscsi-initiator-utils
yum install device-mapper-multipath -y
/etc/init.d/multipathd start
/etc/init.d/iscsid start

chkconfig multipathd on
chkconfig iscsid on

#Discover the target.
iscsiadm -m discovery -t sendtargets -p 192.168.1.100

iscsiadm -m discovery -t sendtargets -p 192.168.0.100

# creating new iscsi interface
iscsiadm -m iface -I iscsi-eth1 -o new

iscsiadm -m iface -I iscsi-eth2 -o new

iscsiadm -m iface -I iscsi-eth1 -o update -n iface.net_ifacename -v eth1

iscsiadm -m iface -I iscsi-eth2 -o update -n iface.net_ifacename -v eth2

#login to all discovered targets
iscsiadm -m node -l
#to Create the multipath config file automatically

#multipath -F
/sbin/mpathconf

#else Create a file /etc/multipath.conf with the following content:

echo "
defaults {
udev_dir /dev
polling_interval 10
path_selector "round-robin 0"
path_grouping_policy multibus
path_checker readsector0
rr_min_io 100
max_fds 8192
rr_weight priorities
failback immediate
no_path_retry fail
user_friendly_names yes
}

" >> /etc/multipath.conf
[root@controller1 ~]# /etc/init.d/multipathd restart
ok
Stopping multipathd daemon: [ OK ]
Starting multipathd daemon: [ OK ]
[root@controller1 ~]# multipath -ll
mpatha (36a4badb00053ae7f0000f49e53d73254) dm-3 DELL,MD3000i
size=250G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 4:0:0:2 sdb 8:16 active ready running
| `- 5:0:0:2 sdc 8:32 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
|- 3:0:0:2 sde 8:64 active ghost running
`- 6:0:0:2 sdd 8:48 active ghost running
[root@controller1 ~]#
#Add Following to /etc/multipath.conf
multipaths {
multipath {
wwid 36a4badb00053ae7f0000f49e53d73254
alias lun0
path_grouping_policy multibus
path_checker readsector0
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry fail
}
}

[root@controller1 ~]# multipath -ll
Jul 29 07:11:45 | multipath.conf line 20, invalid keyword: path_checker
lun0 (36a4badb00053ae7f0000f49e53d73254) dm-3 DELL,MD3000i
size=250G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 4:0:0:2 sdb 8:16 active ready running
| `- 5:0:0:2 sdc 8:32 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
|- 3:0:0:2 sde 8:64 active ghost running
`- 6:0:0:2 sdd 8:48 active ghost running
[root@controller1 ~]#

#List the All DISK's which will include ISCSI drive
fdisk -l

# Use Mkfs to create the file system and mount it using _netdev option

 

More iscsiadm commands

iscsiadm -m session

iscsiadm -m node -u

targets configuration will be in /var/lib/iscsi