installation.md

### Current deployement
## mds
*  ds-507
*  ds-304

## mon
*  ds-507
*  qn-cnfslhc
*  ds-303
*  ds-304
*  cs-001



### Installation
## ssh keys exchange
Choose an admin node to use for the installation process.
Distribute  the ssh key to all the hosts in the cluster.

## Install the deploy script
Add the ceph repository
```
yum install ceph-deploy
yum install ntp ntpdate ntp-doc
```
## Purge cluster
```
ceph-deploy purge qn-cnfslhc ds-001 ds-002 ds-303 ds-304 ds-507
ceph-deploy purgedata qn-cnfslhc ds-001 ds-002 ds-303 ds-304 ds-507
ceph-deploy forgetkeys

```
Create first monitor nodes:
```
ceph-deploy new qn-cnfslhc
```
This will create the following files:
```
ceph.conf
ceph.mon.keyring

```
Add the public network to the configuration file:
```
public_network = 131.154.128.0/22
```
Install the nodes:
```
ceph-deploy install node1 node2 node3
```
Deploy the initial monitoring node:
```
ceph-deploy mon create-initial
```
and the admin keys to the nodes of your cluster
```
ceph-deploy admin qn-cnfslhc ds-001 ...
```
Then deploy the manager node
```
ceph-deploy -v mgr create qn-cnfslhc
```
If you have a dirty installation you may receive errors like:
```
[qn-cnfslhc][ERROR ] [errno 1] error connecting to the cluster
[qn-cnfslhc][ERROR ] exit code from command was: 1
[ceph_deploy.mgr][ERROR ] could not create mgr
[ceph_deploy][ERROR ] GenericError: Failed to create 1 MGRs
```
This means that you must remove the old keys from `/var/lib/ceph`
```
rm -rf /var/lib/ceph/bootstrap-mgr/
```
### Enable dashboard
The dashboard runs on a host with `ceph-mgr` active:
```
yum install ceph-mgr-dashboard # for nautilus
ceph mgr module enable dashboard
ceph config set mgr mgr/dashboard/qn-cnfslhc/server_addr 131.154.130.69
ceph config set mgr mgr/dashboard/qn-cnfslhc/server_port 5000
ceph dashboard set-login-credentials admin <password>
ceph config set mgr mgr/dashboard/ssl false
```
### Monitors
## Add monitor node
```
ceph-deploy -v mon create <id>
ceph-deploy -v  admin <id>
```
## Remove monitor node
```
ceph-deploy -v mon destroy <id>
```

### Metadata
## Add metadata server
```
ceph-deploy mds create ds-507
```

### OSD
## Disk preparation
```
ceph-deploy disk zap ds-507 /dev/nvme0n1
```
Prepare data disks
```
lsblk
dmsetup remove
gdisk /dev/sdbi (x z y y)
ceph--c666c0d8--e77d--4d3e--931e--c7041572f747-osd--block--3414fd14--e0bf--4adf--bf5d--3c0412821d11

ceph-deploy disk zap cs-001 /dev/sdap
```
prepare journal partitions on ssd
```
vgcreate ceph-db-0 /dev/sdbj1

for i in $(seq 40 59); do echo "lvcreate -L 23GB -n db-$i ceph-db-0";done
lvcreate -L 23GB -n db-40 ceph-db-0
lvcreate -L 23GB -n db-41 ceph-db-0
lvcreate -L 23GB -n db-42 ceph-db-0
lvcreate -L 23GB -n db-43 ceph-db-0
lvcreate -L 23GB -n db-44 ceph-db-0
lvcreate -L 23GB -n db-45 ceph-db-0
lvcreate -L 23GB -n db-46 ceph-db-0
lvcreate -L 23GB -n db-47 ceph-db-0
lvcreate -L 23GB -n db-48 ceph-db-0
lvcreate -L 23GB -n db-49 ceph-db-0
lvcreate -L 23GB -n db-50 ceph-db-0
lvcreate -L 23GB -n db-51 ceph-db-0
lvcreate -L 23GB -n db-52 ceph-db-0
lvcreate -L 23GB -n db-53 ceph-db-0
lvcreate -L 23GB -n db-54 ceph-db-0
lvcreate -L 23GB -n db-55 ceph-db-0
lvcreate -L 23GB -n db-56 ceph-db-0
lvcreate -L 23GB -n db-57 ceph-db-0
lvcreate -L 23GB -n db-58 ceph-db-0
lvcreate -L 23GB -n db-59 ceph-db-0

for i in $(seq 40 59); do lvcreate -L 13GB -n wal-$i ceph-db-0;done

for i in $(seq 40 59); do lvresize -L 10G /dev/ceph-db-0/db-$i -y;done
```

### Client installation
### Rados gateway
[Official docs][https://docs.ceph.com/docs/master/install/install-ceph-gateway/]
```
ceph-deploy install --rgw ds-517
ceph-deploy --overwrite-conf rgw create ds-517

Il gateway è già contattabile.
http://client-node:7480



```