Lab11.1 - Deploy a two OSD nodes for the cluster

arbcat · February 2018

First of all, the title of this section isn't quite right

Step 6 returns:


[[email protected] ceph-cluster]$ ceph-deploy osd prepare \
> storage1:/var/local/osd0
usage: ceph-deploy osd [-h] {list,create} ...
ceph-deploy osd: error: argument subcommand: invalid choice: 'prepare' (choose from 'list', 'create')
[[email protected] ceph-cluster]$

Which is strange, because it's clearly documented: (docs look like Jewel version, but that's what I'm running)

http://docs.ceph.com/docs/jewel/man/8/ceph-deploy/


[[email protected] yum.repos.d]$ rpm -qa | grep ceph
python-cephfs-10.2.10-0.el7.x86_64
centos-release-ceph-jewel-1.0-1.el7.centos.noarch
ceph-osd-10.2.10-0.el7.x86_64
libcephfs1-10.2.10-0.el7.x86_64
ceph-mds-10.2.10-0.el7.x86_64
ceph-mon-10.2.10-0.el7.x86_64
ceph-base-10.2.10-0.el7.x86_64
ceph-release-1-1.el7.noarch
ceph-selinux-10.2.10-0.el7.x86_64
ceph-radosgw-10.2.10-0.el7.x86_64
ceph-common-10.2.10-0.el7.x86_64
ceph-10.2.10-0.el7.x86_64

[[email protected] yum.repos.d]$ ceph-deploy --version
2.0.0
[[email protected] yum.repos.d]$

What was anybody's workaround? Potentially upgrading to Luminous?

serewicz · March 2018

Hello,

In case you get two similar messages I responded once but have not seen it come through, so I'm answering it again.

The error you're seeing is due to use of a newer version of Ceph than Kraken, which the book declares. The commands to deploy OSDs has changed in the newer versions. The steps to use there can be found here: http://docs.ceph.com/docs/master/install/manual-deployment/

Using Kraken, the version the lab covers, continues to work. I was able to get a single OSD up and working with the following steps on the rdo-cc node. First the output of ceph -s to show the MON is working and one OSD is all the way into the cluster. I just wanted to check the overall steps.

[[email protected] ceph-cluster]$ ceph -s

    cluster 65d3daef-3662-42fb-b946-c15dff99a12d

     health HEALTH_WARN

            64 pgs degraded

            64 pgs undersized

     monmap e1: 1 mons at {ip-172-31-16-231=172.31.16.231:6789/0}

            election epoch 3, quorum 0 ip-172-31-16-231

     osdmap e6: 2 osds: 1 up, 1 in

            flags sortbitwise,require_jewel_osds

      pgmap v9: 64 pgs, 1 pools, 0 bytes data, 0 objects

            5152 MB used, 5076 MB / 10229 MB avail

                  64 active+undersized+degraded

Commands I did on RDO-CC

As root:

   1 yum update -y #This failed due to a python issue caused by OpenStack. I moved on.

    2 yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

    3 vim /etc/yum.repos.d/start-ceph.repo #Vim was not installed

    4 yum install vim

    5 vim /etc/yum.repos.d/start-ceph.repo

[[email protected] ~]# cat /etc/yum.repos.d/start-ceph.repo

[ceph-noarch]

name=Ceph noarch packages

baseurl=https://download.ceph.com/rpm-kraken/el7/noarch

enabled=1

gpgcheck=0

type=rpm-md

gpgkey=https://download.ceph.com/keys/release.asc

6 yum update -y

7 yum install -y ceph-deploy ### This worked when I did it on a non-openstack system, but failed due to python with openstack.

7a pip install ceph-deploy #### Only if python is an issue

    8 useradd -d /home/ceph -m ceph

    9 id ceph

   10 echo ceph | passwd --stdin ceph

   11 echo "ceph ALL = (root) NOPASSWD:ALL" > /etc/sudoers.d/ceph

   12 chmod 0400 /etc/sudoers.d/ceph

   13 su - ceph

rdo-cc As ceph:

    9 ssh-copy-id [email protected]

   10 for ip in ip-172-31-26-167 ip-172-31-16-216 ip-172-31-20-244 ip-172-31-16-231 ; do ssh [email protected]$ip 'uname -a' ; done

   11 sudo setenforce 0; sudo yum -y install yum-plugin-priorities

   12 mkdir ceph-cluster

   13 cd ceph-cluster/

   14 ceph-deploy new ip-172-31-16-231

   15 vim ceph.conf

   16 ceph-deploy install ip-172-31-16-231 ip-172-31-26-167 ip-172-31-16-216 ip-172-31-20-244

   17 ceph-deploy mon create-initial

   18 ceph-deploy osd prepare ip-172-31-26-167:/var/local/osd0

   19 ceph -s

   20 ceph-deploy osd activate ip-172-31-26-167:/var/local/osd0

Hopefully this helps. Please let the forum know if Kraken continues to have this issue. We will be updating to a new version of OpenStack and of Ceph in the near future.

Regards,

jcabrera · April 2018

Tried the above steps and still upgrading to the latest ceph-deploy version 2.0. This version only allows list and create as options so running the ceph-desplay osd prepare... will give error.

"Downloading packages:

python-pip-8.1.2-1.el7.noarch.rpm | 1.7 MB 00:00:00

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Installing : python-pip-8.1.2-1.el7.noarch 1/1

Verifying : python-pip-8.1.2-1.el7.noarch 1/1

Installed:

python-pip.noarch 0:8.1.2-1.el7

Complete!

Collecting ceph-deploy

Downloading ceph-deploy-2.0.0.tar.gz (113kB)

100% |████████████████████████████████| 122kB 4.9MB/s

Requirement already satisfied (use --upgrade to upgrade): setuptools in /usr/lib/python2.7/

site-packages (from ceph-deploy)

Installing collected packages: ceph-deploy

Running setup.py install for ceph-deploy ... done

Successfully installed ceph-deploy-2.0.0

You are using pip version 8.1.2, however version 9.0.3 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

[[email protected] ~]# cat /etc/yum.repos.d/start-ceph.repo

[ceph-noarch]

name=Ceph noarch packages

baseurl=https://download.ceph.com/rpm-kraken/el7/noarch

enabled=1

gpgcheck=0

type=rpm-md

gpgkey=https://download.ceph.com/keys/release.asc

[[email protected] ~]#"

serewicz · April 2018

Hello,

I will try the steps I mentioned again, and get back to you. I think we may be doing different steps, which is leading to the difference in outcome.

I'm trying it again now.

Regards,

serewicz · April 2018

Hello,

I will try the steps I mentioned again, and get back to you. I think we may be doing different steps, which is leading to the difference in outcome.

I'm trying it again now.

Regards,

serewicz · April 2018

It would seem that to avoid the ongoing python issues the ceph-deploy binary was updated. As OpenStack requires an older python version due to a different bug they were unable to work together. After attempts at almost every permutation the fix is to use the lumimous version of ceph and force an older version of ceph-deploy using pip install ceph-deploy==1.5.39.

Following is the full history output on each node, as well as some of the config files. Then the HEALTH_OK of the ceph cluster with the starting two-node setup.

The rdo-cc root user has many command in place prior to becoming available. These are all the commands run, and the repo file:


 yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
  171  vim /etc/yum.repos.d/start-ceph.repo
  172  cat /etc/yum.repos.d/start-ceph.repo
  173  yum install python-pip
  174  pip install ceph-deploy==1.5.39
  175  useradd -d /home/ceph -m ceph
  176  echo ceph | passwd --stdin ceph
  177  echo "ceph ALL = (root) NOPASSWD:ALL" > /etc/sudoers.d/ceph
  178  chmod 0400 /etc/sudoers.d/ceph
  179  su - ceph
  180  ssh storage1
  181  ssh storage2
  182  su - ceph
  183  history
[[email protected] ~]# cat /etc/yum.repos.d/start-ceph.repo
[ceph-noarch]
name=Ceph noarch packages
baseurl=https://download.ceph.com/rpm-luminous/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://download.ceph.com/keys/release.asc
[[email protected] ~]#

Here is the history of ceph user on rdo-cc:


[[email protected] ceph-cluster]$ history
    1  ls /root
    2  sudo ls /root
    3  exit
    4  ssh-keygen
    5  ssh-copy-id storage1
    6  ssh-copy-id storage2
    7  ssh-copy-id rdo-cc
    8  getenforce
    9  for node in storage1 storage2 rdo-cc; do ssh $node 'yum -y install yum-plugin-priorities';
done
   10  for node in storage1 storage2 rdo-cc; do ssh $node 'sudo yum -y install yum-plugin-prioriti
es'; done
   11  mkdir ceph-cluster
   12  cd ceph-cluster
   13  ceph-deploy new rdo-cc
   14  vim ceph.conf
   15  ceph-deploy install storage1 storage2 rdo-cc
   16  ceph-deploy mon create-initial
   17  ssh storage1
   18  ssh storage2
   19  ceph-deploy osd prepare storage1:/var/local/osd0
   20  ceph-deploy osd prepare storage2:/var/local/osd1
   21  ceph-deploy osd activate storage1:/var/local/osd0 storage2:/var/local/osd1
   22  ceph -s
   23  history

Here is storage1:


[[email protected] ~]# history
    1  useradd -d /home/ceph -m ceph
    2  echo ceph | passwd --stdin ceph
    3  echo "ceph ALL = (root) NOPASSWD:ALL" > /etc/sudoers.d/ceph
    4  chmod 0400 /etc/sudoers.d/ceph
    5  exit
    6  parted /dev/xvdb -- mklabel gpt
    7  parted /dev/xvdb -- mkpart part1 2048s 50%
    8  parted /dev/xvdb -- mkpart part2 51% 100%
    9  mkfs.xfs /dev/xvdb1
   10  mkdir -p /var/local/osd0
   11  echo "/dev/xvdb1 /var/local/osd0 xfs noatime,nobarrier 0 0" >> /etc/fstab
   12  mount /var/local/osd0/
   13  chown ceph.ceph /var/local/osd0
   14  df -h /var/local/osd0
   15  exit
   16  history

And on storage2:


[[email protected] ~]# history
    1  useradd -d /home/ceph -m ceph
    2  echo ceph | passwd --stdin ceph
    3  echo "ceph ALL = (root) NOPASSWD:ALL" > /etc/sudoers.d/ceph
    4  chmod 0400 /etc/sudoers.d/ceph
    5  exit
    6  parted /dev/xvdb -- mklabel gpt
    7  parted /dev/xvdb -- mkpart part1 2048s 50%
    8  parted /dev/xvdb -- mkpart part2 51% 100%
    9  mkfs.xfs /dev/xvdb1
   10  mkdir -p /var/local/osd1
   11  echo "/dev/xvdb1 /var/local/osd1 xfs noatime,nobarrier 0 0" >> /etc/fstab
   12  mount /var/local/osd1
   13  chown ceph.ceph /var/local/osd1
   14  df -h /var/local/osd1
   15  exit
   16  history

Finally the end result:


[[email protected] ceph-cluster]$ ceph -s
    cluster 8d2db565-40db-4f65-b223-8754294ea0a1
     health HEALTH_OK
     monmap e1: 1 mons at {rdo-cc=192.168.98.1:6789/0}
            election epoch 3, quorum 0 rdo-cc
     osdmap e10: 2 osds: 2 up, 2 in
            flags sortbitwise,require_jewel_osds
      pgmap v18: 64 pgs, 1 pools, 0 bytes data, 0 objects
            10305 MB used, 66454 MB / 76760 MB avail
                  64 active+clean
[[email protected] ceph-cluster]$

Please let us know if you continue to have issues with the lab.

Regards,

jcabrera · April 2018

Thank you very much. It works!

Cheers...

Lab11.1 - Deploy a two OSD nodes for the cluster

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