Ceph Octopus on CentOS 8 Stream Lab

Summary⌗

This is the starting point for future ceph labs or test. It is designed with a mixture of drive sizes to allow for different labs and scenarios.

Key difference between this and the Ceph Octopus Lab is this will be built on VMs running CentOS 8 Streams.

It should take around an hour to build from scratch using the quick setup scripts

Setup VMs⌗

There will be 13 VMs set up and 2 networks. The Detailed Setup shows the full setup on 1 OSD node. Using the Quick Setup script will create the environment from scratch.

Base System Requirements (Does not include optional nodes)

CPU >= 44
Memory >= 82GB
Disk >= 580GB

Host	Role	Count	vCPU	Memory	Disk Size	OSD Disks	OSD Disk Size	Optional
bastion	bastion	1	2	2GB	40GB	0		No
grafana	grafana	1	2	4GB	40GB	0		No
monitor	mon/mgr	3	4	4GB	40GB	0		No
t1-osd	osd	4	4	8GB	40GB	4	5GB	No
t2-osd	osd	4	4	8GB	40GB	4	10GB	No
rgw	rgw	2	2	4GB	40GB	0		Yes
mds	mds	2	4	8GB	40GB	0		Yes
iscsi	iscsi	2	4	8GB	40GB	0		Yes

Detailed Setup⌗

Create Networks⌗

Ceph presentation network

xml ceph-presentation.xml


<network>
  <name>ceph-presentation</name>
  <bridge name="virbr3300"/>
  <forward mode="nat"/>
  <domain name="ceph.lab"/>
  <ip address="10.44.20.1" netmask="255.255.255.0">
    <dhcp>
      <range start="10.44.20.200" end="10.44.20.210"/>
    </dhcp>
  </ip>
</network>

Ceph replication network

xml ceph-replication.xml


<network>
  <name>ceph-replication</name>
  <bridge name="virbr3301"/>
  <ip address="172.16.20.1" netmask="255.255.255.0">
    <dhcp>
      <range start="172.16.20.200" end="172.16.20.210"/>
    </dhcp>
  </ip>
</network>

Create these in libvirt

bash



# virsh net-define ceph-presentation.xml 
Network ceph-presentation defined from ceph-presentation.xml

# virsh net-start ceph-presentation
Network ceph-presentation started

# virsh net-autostart ceph-presentation 
Network ceph-presentation marked as autostarted

# virsh net-define ceph-replication.xml 
Network ceph-replication defined from ceph-replication.xml

# virsh net-start ceph-replication 
Network ceph-replication started

# virsh net-autostart ceph-replication 
Network ceph-replication marked as autostarted

Create VM Example⌗

This will create an OSD node. For other nodes, there wont be the need for as many drives to be created.

Create the OS drive for the node

bash


# qemu-img create -f qcow2 /var/lib/libvirt/images/ceph-osd-t1-node01.qcow2 40G
Formatting '/var/lib/libvirt/images/ceph-osd-t1-node01.qcow2', fmt=qcow2 cluster_size=65536 compression_type=zlib size=42949672960 lazy_refcounts=off refcount_bits=16

Expand the OS base image into the drive. For this setup it will be using CentOS 7

bash


# virt-resize --expand /dev/sda1 /var/lib/libvirt/images/iso/CentOS-Stream-GenericCloud-8-20201217.0.x86_64.qcow2 /var/lib/libvirt/images/ceph-osd-t1-node01.qcow2

Customise the OS so it can be used

bash


# virt-customize -a /var/lib/libvirt/images/ceph-osd-t1-node01.qcow2 \
  --root-password password:password \
  --uninstall cloud-init \
  --hostname ceph-osd-t1-node01 \
  --ssh-inject root:file:/root/.ssh/id_ed25519.pub \
  --selinux-relabel

Create the 4 OSD drives (5GB for t1 nodes)

bash


# for i in `seq -w 01 04`; do qemu-img create -f qcow2 /var/lib/libvirt/images/ceph-osd-t1-node01-osd$i.qcow2 40G; done
Formatting '/var/lib/libvirt/images/ceph-osd-t1-node01-osd01.qcow2', fmt=qcow2 cluster_size=65536 compression_type=zlib size=42949672960 lazy_refcounts=off refcount_bits=16
Formatting '/var/lib/libvirt/images/ceph-osd-t1-node01-osd02.qcow2', fmt=qcow2 cluster_size=65536 compression_type=zlib size=42949672960 lazy_refcounts=off refcount_bits=16
Formatting '/var/lib/libvirt/images/ceph-osd-t1-node01-osd03.qcow2', fmt=qcow2 cluster_size=65536 compression_type=zlib size=42949672960 lazy_refcounts=off refcount_bits=16
Formatting '/var/lib/libvirt/images/ceph-osd-t1-node01-osd04.qcow2', fmt=qcow2 cluster_size=65536 compression_type=zlib size=42949672960 lazy_refcounts=off refcount_bits=16

Define the VM, with both networks and all drives attached. Remove --dry-run and --print-xml in order to create the domain.

bash


# virt-install --name ceph-osd-t1-node01.ceph.lab \
  --virt-type kvm \
  --memory 16384 \
  --vcpus 4 \
  --boot hd,menu=on \
  --disk path=/var/lib/libvirt/images/ceph-osd-t1-node01.qcow2,device=disk \
  --disk path=/var/lib/libvirt/images/ceph-osd-t1-node01-osd01.qcow2,device=disk \
  --disk path=/var/lib/libvirt/images/ceph-osd-t1-node01-osd02.qcow2,device=disk \
  --disk path=/var/lib/libvirt/images/ceph-osd-t1-node01-osd03.qcow2,device=disk \
  --disk path=/var/lib/libvirt/images/ceph-osd-t1-node01-osd04.qcow2,device=disk \
  --os-type Linux \
  --os-variant centos7 \
  --network network:ceph-presentation \
  --network network:ceph-replication \
  --graphics spice \
  --noautoconsole \
  --dry-run \
  --print-xml

Quick Setup⌗

Script options are set as variables. By default it won’t build any of the optional nodes. If the vars are set to yes this will be build them. It is somewhat idempotent as well. A teardown script is also available to clean this all up.

The nodes built by the script (including optional)

Hostname	Public IP	Replication IP
bastion.ceph.lab	DHCP	None
grafana.ceph.lab	DHCP	None
ceph-mon01.ceph.lab	10.44.20.21	172.16.20.21
ceph-mon02.ceph.lab	10.44.20.22	172.16.20.22
ceph-mon03.ceph.lab	10.44.20.23	172.16.20.23
ceph-t1-osd01.ceph.lab	10.44.20.31	172.16.20.31
ceph-t1-osd02.ceph.lab	10.44.20.32	172.16.20.32
ceph-t1-osd03.ceph.lab	10.44.20.33	172.16.20.33
ceph-t1-osd04.ceph.lab	10.44.20.34	172.16.20.34
ceph-t2-osd01.ceph.lab	10.44.20.41	172.16.20.41
ceph-t2-osd02.ceph.lab	10.44.20.42	172.16.20.42
ceph-t2-osd03.ceph.lab	10.44.20.43	172.16.20.43
ceph-t2-osd04.ceph.lab	10.44.20.44	172.16.20.44
ceph-rgw01.ceph.lab	10.44.20.111	None
ceph-rgw02.ceph.lab	10.44.20.112	None
ceph-mds01.ceph.lab	10.44.20.121	None
ceph-mds02.ceph.lab	10.44.20.122	None
ceph-iscsi01.ceph.lab	10.44.20.131	None
ceph-iscsi02.ceph.lab	10.44.20.132	None

Scripts can also be found on GitHub

bash setup.sh


#!/bin/bash

# Node building vars
image_dir="/var/lib/libvirt/images"
base_os_img="/var/lib/libvirt/images/iso/CentOS-Stream-GenericCloud-8-20201217.0.x86_64.qcow2"
ssh_pub_key="/root/.ssh/id_ed25519.pub"

# Network Vars
dns_domain="ceph.lab"

# Extra Vars
root_password="password"
os_drive_size="40G"
tmp_dir="/tmp"

# Ceph Extra nodes 
rgw=no
mds=no
iscsi=no


##### Start #####

# Exit on any failure

set -e

# Create Network files

echo "Creating ceph-presentation xml file"

cat <<EOF > $tmp_dir/ceph-presentation.xml
<network>
  <name>ceph-presentation</name>
  <bridge name="virbr3300"/>
  <forward mode="nat"/>
  <domain name="ceph.lab"/>
  <ip address="10.44.20.1" netmask="255.255.255.0">
    <dhcp>
      <range start="10.44.20.200" end="10.44.20.210"/>
    </dhcp>
  </ip>
</network>
EOF

echo "Creating ceph-replicaton xml file"
cat <<EOF >$tmp_dir/ceph-replication.xml
<network>
  <name>ceph-replication</name>
  <bridge name="virbr3301"/>
  <ip address="172.16.20.1" netmask="255.255.255.0">
    <dhcp>
      <range start="172.16.20.200" end="172.16.20.210"/>
    </dhcp>
  </ip>
</network>
EOF

echo "Creating Ceph networks in libvirt"

check_rep=$(virsh net-list --all | grep ceph-replication >/dev/null && echo "0" || echo "1")
check_pres=$(virsh net-list --all | grep ceph-presentation >/dev/null && echo "0" || echo "1")

networks=()

if [[ $check_rep == "1" ]]; then
  networks+=("ceph-replication")
fi

if [[ $check_pres == "1" ]]; then
  networks+=("ceph-presentation")
fi

net_len=$(echo "${#networks[@]}")

echo "Creating networks ${#networks[@]}"

if [ "$net_len" -ge 1 ]; then
  for network in ${networks[@]}; do 
    virsh net-define $tmp_dir/$network.xml
    virsh net-start $network
    virsh net-autostart $network
  done
fi

# Check OS image exists

if [ -f "$base_os_img" ]; then
  echo "Base OS image exists"
else
  echo "Base image doesn't exist ($base_os_img). Exiting"
  exit 1
fi

# Build OS drives for machines

echo "Starting build of VMs"

echo "Building Bastion & Grafana drives"

for node in bastion grafana; do 
  check=$(virsh list --all | grep $node.$dns_domain > /dev/null && echo "0" || echo "1" )
  if [[ $check == "0" ]]; then
    echo "$node.$dns_domain exists"
  else
    echo "Starting $node"
    echo "Creating $image_dir/$node.$dns_domain.qcow2 at $os_drive_size"
    qemu-img create -f qcow2 $image_dir/$node.$dns_domain.qcow2 $os_drive_size
    echo "Resizing base OS image"
    virt-resize --expand /dev/sda1 $base_os_img $image_dir/$node.$dns_domain.qcow2
    echo "Customising OS for $node"
    virt-customize -a $image_dir/$node.$dns_domain.qcow2 \
      --root-password password:$root_password \
      --uninstall cloud-init \
      --hostname $node.$dns_domain \
      --ssh-inject root:file:$ssh_pub_key \
      --selinux-relabel
  fi
done

check=$(virsh list --all | grep bastion.$dns_domain > /dev/null && echo "0" || echo "1" )
if [[ $check == "1" ]]; then
  echo "Defining Bastion VM"
  virt-install --name bastion.$dns_domain \
    --virt-type kvm \
    --memory 2048 \
    --vcpus 2 \
    --boot hd,menu=on \
    --disk path=$image_dir/bastion.$dns_domain.qcow2,device=disk \
    --os-type Linux \
    --os-variant centos7 \
    --network network:ceph-presentation \
    --graphics spice \
    --noautoconsole
fi

check=$(virsh list --all | grep grafana.$dns_domain > /dev/null && echo "0" || echo "1" )
if [[ $check == "1" ]]; then
  echo "Defining Grafana VM"
  virt-install --name grafana.$dns_domain \
    --virt-type kvm \
    --memory 4096 \
    --vcpus 2 \
    --boot hd,menu=on \
    --disk path=$image_dir/grafana.$dns_domain.qcow2,device=disk \
    --os-type Linux \
    --os-variant centos7 \
    --network network:ceph-presentation \
    --graphics spice \
    --noautoconsole
fi

echo "Building Monitor VMs"

count=1

for mon in `seq -w 01 03`; do 
  check=$(virsh list --all | grep ceph-mon$mon.$dns_domain > /dev/null && echo "0" || echo "1" )
  if [[ $check == "0" ]]; then
    echo "ceph-mon$mon.$dns_domain already exists"
    count=$(( $count + 1 ))
  else
    echo "Creating eth0 ifcfg file"
    mkdir -p $tmp_dir/ceph-mon$mon
    cat <<EOF > $tmp_dir/ceph-mon$mon/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.2$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
    echo "Creating eth1 ifcfg file"
    cat <<EOF > $tmp_dir/ceph-mon$mon/ifcfg-eth1
TYPE=Ethernet
NAME=eth1
DEVICE=eth1
BOOTPROTO=static
IPADDR=172.16.20.2$count
NETMASK=255.255.255.0
EOF
    echo "Starting ceph-mon$mon"
    echo "Creating $image_dir/ceph-mon$mon.$dns_domain.qcow2 at $os_drive_size"
    qemu-img create -f qcow2 $image_dir/ceph-mon$mon.$dns_domain.qcow2 $os_drive_size
    echo "Resizing base OS image"
    virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-mon$mon.$dns_domain.qcow2
    echo "Customising OS for ceph-mon$mon"
    virt-customize -a $image_dir/ceph-mon$mon.$dns_domain.qcow2 \
      --root-password password:$root_password \
      --uninstall cloud-init \
      --hostname ceph-mon$mon \
      --ssh-inject root:file:$ssh_pub_key \
      --copy-in $tmp_dir/ceph-mon$mon/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
      --copy-in $tmp_dir/ceph-mon$mon/ifcfg-eth1:/etc/sysconfig/network-scripts/ \
      --selinux-relabel
    echo "Defining ceph-mon$mon.$dns_domain"
    virt-install --name ceph-mon$mon.$dns_domain \
      --virt-type kvm \
      --memory 4096 \
      --vcpus 4 \
      --boot hd,menu=on \
      --disk path=$image_dir/ceph-mon$mon.$dns_domain.qcow2,device=disk \
      --os-type Linux \
      --os-variant centos7 \
      --network network:ceph-presentation \
      --network network:ceph-replication \
      --graphics spice \
      --noautoconsole
    count=$(( $count + 1 ))
  fi
done

echo "Building OSD T1 drives"

count=1

for i in `seq -w 01 04`; do 
  check=$(virsh list --all | grep ceph-t1-osd$i.$dns_domain > /dev/null && echo "0" || echo "1" )
  if [[ $check == "0" ]]; then
    echo "ceph-t1-osd$i.$dns_domain already exists"
    count=$(( $count + 1 ))
  else
    echo "Creating eth0 ifcfg file"
    mkdir -p $tmp_dir/ceph-t1-osd$i
    cat <<EOF > $tmp_dir/ceph-t1-osd$i/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.3$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
    echo "Creating eth1 ifcfg file"
    cat <<EOF > $tmp_dir/ceph-t1-osd$i/ifcfg-eth1
TYPE=Ethernet
NAME=eth1
DEVICE=eth1
BOOTPROTO=static
IPADDR=172.16.20.3$count
NETMASK=255.255.255.0
EOF
    echo "Starting ceph-t1-osd$i"
    echo "Creating $image_dir/ceph-t1-osd$i.$dns_domain.qcow2 at $os_drive_size"
    qemu-img create -f qcow2 $image_dir/ceph-t1-osd$i.$dns_domain.qcow2 $os_drive_size
    for c in {1..4}; do 
      qemu-img create -f qcow2 $image_dir/ceph-t1-osd$i-disk$c.$dns_domain.qcow2 5G
    done
    echo "Resizing base OS image"
    virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-t1-osd$i.$dns_domain.qcow2
    echo "Customising OS for ceph-t1-osd$i"
    virt-customize -a $image_dir/ceph-t1-osd$i.$dns_domain.qcow2 \
      --root-password password:$root_password \
      --uninstall cloud-init \
      --hostname ceph-t1-osd$i \
      --ssh-inject root:file:$ssh_pub_key \
      --copy-in $tmp_dir/ceph-t1-osd$i/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
      --copy-in $tmp_dir/ceph-t1-osd$i/ifcfg-eth1:/etc/sysconfig/network-scripts/ \
      --selinux-relabel
    echo "Defining ceph-t1-osd$i"
    virt-install --name ceph-t1-osd$i.$dns_domain \
      --virt-type kvm \
      --memory 8192 \
      --vcpus 4 \
      --boot hd,menu=on \
      --disk path=$image_dir/ceph-t1-osd$i.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t1-osd$i-disk1.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t1-osd$i-disk2.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t1-osd$i-disk3.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t1-osd$i-disk4.$dns_domain.qcow2,device=disk \
      --os-type Linux \
      --os-variant centos7 \
      --network network:ceph-presentation \
      --network network:ceph-replication \
      --graphics spice \
      --noautoconsole
    
    count=$(( $count + 1 ))
  fi
done

echo "Building OSD T2 drives"

count=1

for i in `seq -w 01 04`; do 
  check=$(virsh list --all | grep ceph-t2-osd$i.$dns_domain > /dev/null && echo "0" || echo "1" )
  if [[ $check == "0" ]]; then
    echo "ceph-t2-osd$i.$dns_domain already exists"
    count=$(( $count + 1 ))
  else
    echo "Creating eth0 ifcfg file"
    mkdir -p $tmp_dir/ceph-t2-osd$i
    cat <<EOF > $tmp_dir/ceph-t2-osd$i/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.4$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
    echo "Creating eth1 ifcfg file"
    cat <<EOF > $tmp_dir/ceph-t2-osd$i/ifcfg-eth1
TYPE=Ethernet
NAME=eth1
DEVICE=eth1
BOOTPROTO=static
IPADDR=172.16.20.4$count
NETMASK=255.255.255.0
EOF
    echo "Starting ceph-t2-osd$i"
    echo "Creating $image_dir/ceph-t2-osd$i.$dns_domain.qcow2 at $os_drive_size"
    qemu-img create -f qcow2 $image_dir/ceph-t2-osd$i.$dns_domain.qcow2 $os_drive_size
    for c in {1..4}; do
      qemu-img create -f qcow2 $image_dir/ceph-t2-osd$i-disk$c.$dns_domain.qcow2 10G
    done
    echo "Resizing base OS image"
    virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-t2-osd$i.$dns_domain.qcow2
    echo "Customising OS for ceph-t2-osd$i"
    virt-customize -a $image_dir/ceph-t2-osd$i.$dns_domain.qcow2 \
      --root-password password:$root_password \
      --uninstall cloud-init \
      --hostname ceph-t2-osd$i \
      --ssh-inject root:file:$ssh_pub_key \
      --copy-in $tmp_dir/ceph-t2-osd$i/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
      --copy-in $tmp_dir/ceph-t2-osd$i/ifcfg-eth1:/etc/sysconfig/network-scripts/ \
      --selinux-relabel
  
    echo "Defining ceph-t2-osd$i"
    virt-install --name ceph-t2-osd$i.$dns_domain \
      --virt-type kvm \
      --memory 8192 \
      --vcpus 4 \
      --boot hd,menu=on \
      --disk path=$image_dir/ceph-t2-osd$i.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t2-osd$i-disk1.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t2-osd$i-disk2.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t2-osd$i-disk3.$dns_domain.qcow2,device=disk \
      --disk path=$image_dir/ceph-t2-osd$i-disk4.$dns_domain.qcow2,device=disk \
      --os-type Linux \
      --os-variant centos7 \
      --network network:ceph-presentation \
      --network network:ceph-replication \
      --graphics spice \
      --noautoconsole
    count=$(( $count + 1 ))
  fi
done

## Build extra ceph nodes if defines

# If rgw is "yes"

if [[ $rgw == "yes" ]]; then
  count=1
  for rgw in `seq -w 01 02`; do 
    check=$(virsh list --all | grep ceph-rgw$rgw.$dns_domain > /dev/null && echo "0" || echo "1" )
    if [[ $check == "0" ]]; then
      echo "ceph-rgw$rgw.$dns_domain already exists"
      count=$(( $count + 1 ))
    else
      echo "Creating eth0 ifcfg file"
      mkdir -p $tmp_dir/ceph-rgw$rgw
      cat <<EOF > $tmp_dir/ceph-rgw$rgw/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.11$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
      echo "Starting ceph-rgw$rgw"
      echo "Creating $image_dir/ceph-rgw$rgw.$dns_domain.qcow2 at $os_drive_size"
      qemu-img create -f qcow2 $image_dir/ceph-rgw$rgw.$dns_domain.qcow2 $os_drive_size
      echo "Resizing base OS image"
      virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-rgw$rgw.$dns_domain.qcow2
      echo "Customising OS for ceph-rgw$rgw"
      virt-customize -a $image_dir/ceph-rgw$rgw.$dns_domain.qcow2 \
        --root-password password:$root_password \
        --uninstall cloud-init \
        --hostname ceph-rgw$rgw \
        --ssh-inject root:file:$ssh_pub_key \
        --copy-in $tmp_dir/ceph-rgw$rgw/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
        --selinux-relabel
      echo "Defining ceph-rgw$rgw.$dns_domain"
      virt-install --name ceph-rgw$rgw.$dns_domain \
        --virt-type kvm \
        --memory 4096 \
        --vcpus 2 \
        --boot hd,menu=on \
        --disk path=$image_dir/ceph-rgw$rgw.$dns_domain.qcow2,device=disk \
        --os-type Linux \
        --os-variant centos7 \
        --network network:ceph-presentation \
        --graphics spice \
        --noautoconsole
      count=$(( $count + 1 ))
    fi
  done
fi

# If mds set to "yes"

if [[ $mds == "yes" ]]; then
  count=1
  for mds in `seq -w 01 02`; do
    check=$(virsh list --all | grep ceph-mds$mds.$dns_domain > /dev/null && echo "0" || echo "1" )
    if [[ $check == "0" ]]; then
      echo "ceph-mds$mds.$dns_domain already exists"
      count=$(( $count + 1 ))
    else
      echo "Creating eth0 ifcfg file"
      mkdir -p $tmp_dir/ceph-mds$mds
      cat <<EOF > $tmp_dir/ceph-mds$mds/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.12$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
      echo "Starting ceph-mds$mds"
      echo "Creating $image_dir/ceph-mds$mds.$dns_domain.qcow2 at $os_drive_size"
      qemu-img create -f qcow2 $image_dir/ceph-mds$mds.$dns_domain.qcow2 $os_drive_size
      echo "Resizing base OS image"
      virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-mds$mds.$dns_domain.qcow2
      echo "Customising OS for ceph-mds$mds"
      virt-customize -a $image_dir/ceph-mds$mds.$dns_domain.qcow2 \
        --root-password password:$root_password \
        --uninstall cloud-init \
        --hostname ceph-mds$mds \
        --ssh-inject root:file:$ssh_pub_key \
        --copy-in $tmp_dir/ceph-mds$mds/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
        --selinux-relabel
      echo "Defining ceph-mds$mds.$dns_domain"
      virt-install --name ceph-mds$mds.$dns_domain \
        --virt-type kvm \
        --memory 8192 \
        --vcpus 4 \
        --boot hd,menu=on \
        --disk path=$image_dir/ceph-mds$mds.$dns_domain.qcow2,device=disk \
        --os-type Linux \
        --os-variant centos7 \
        --network network:ceph-presentation \
        --graphics spice \
        --noautoconsole
      count=$(( $count + 1 ))
    fi
  done
fi

# If iscsi set to "yes"

if [[ $iscsi == "yes" ]]; then
  count=1
  for iscsi in `seq -w 01 02`; do
    check=$(virsh list --all | grep ceph-iscsi$iscsi.$dns_domain > /dev/null && echo "0" || echo "1" )
    if [[ $check == "0" ]]; then
      echo "ceph-iscsi$iscsi.$dns_domain already exists"
      count=$(( $count + 1 ))
    else
      echo "Creating eth0 ifcfg file"
      mkdir -p $tmp_dir/ceph-iscsi$iscsi
      cat <<EOF > $tmp_dir/ceph-iscsi$iscsi/ifcfg-eth0
TYPE=Ethernet
NAME=eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=10.44.20.13$count
NETMASK=255.255.255.0
GATEWAY=10.44.20.1
DNS1=10.44.20.1
ONBOOT=yes
DEFROUTE=yes
EOF
      echo "Starting ceph-iscsi$iscsi"
      echo "Creating $image_dir/ceph-iscsi$iscsi.$dns_domain.qcow2 at $os_drive_size"
      qemu-img create -f qcow2 $image_dir/ceph-iscsi$iscsi.$dns_domain.qcow2 $os_drive_size
      echo "Resizing base OS image"
      virt-resize --expand /dev/sda1 $base_os_img $image_dir/ceph-iscsi$iscsi.$dns_domain.qcow2
      echo "Customising OS for ceph-iscsi$iscsi"
      virt-customize -a $image_dir/ceph-iscsi$iscsi.$dns_domain.qcow2 \
        --root-password password:$root_password \
        --uninstall cloud-init \
        --hostname ceph-iscsi$iscsi \
        --ssh-inject root:file:$ssh_pub_key \
        --copy-in $tmp_dir/ceph-iscsi$iscsi/ifcfg-eth0:/etc/sysconfig/network-scripts/ \
        --selinux-relabel
      echo "Defining ceph-iscsi$iscsi.$dns_domain"
      virt-install --name ceph-iscsi$iscsi.$dns_domain \
        --virt-type kvm \
        --memory 8192 \
        --vcpus 4 \
        --boot hd,menu=on \
        --disk path=$image_dir/ceph-iscsi$iscsi.$dns_domain.qcow2,device=disk \
        --os-type Linux \
        --os-variant centos7 \
        --network network:ceph-presentation \
        --graphics spice \
        --noautoconsole
      count=$(( $count + 1 ))
    fi
  done
fi

# Print running VMs

virsh list

Demo⌗

Adding More Disks⌗

If there’s a capacity or a need to add some more drives to the OSD nodes this example will add more drives to the OSD VMs

{f..g} will add 2 more drives to dev/vdf and /def/vdg. Change this to add more.

bash



# path=/var/lib/libvirt/images/                                                                                                                       
# size=50G                                                                                                                                                                                                                                                                                                                   
# server=$(virsh list | grep osd | awk '{print $2}')

for s in $server; do \
   d=1; \
  for l in {f..g}; do \
  qemu-img create -f qcow2 $path/$s-extradisk$d.qcow2 $size; \
  virsh attach-disk $s $path/$s-extradisk$d.qcow2 vd$l --subdriver qcow2 --persistent; \
  d=$(( $d + 1 )); \
  done; \
done

Cleanup⌗

Cleanup bash script to remove all the parts of the Ceph lab

Scripts can also be found on GitHub

bash teardown.sh



#!/bin/bash

# Node building vars
image_dir="/var/lib/libvirt/images"
base_os_img="/var/lib/libvirt/images/iso/CentOS-Stream-GenericCloud-8-20201217.0.x86_64.qcow2"
ssh_pub_key="/root/.ssh/id_ed25519.pub"

# Network Vars
dns_domain="ceph.lab"

# Extra Vars
root_password="password"
os_drive_size="40G"
tmp_dir="/tmp"


##### Start #####

# Destroy & Undefine all nodes

echo "Destroy & Undefine all nodes"
virsh destroy bastion.$dns_domain
virsh destroy grafana.$dns_domain
virsh undefine bastion.$dns_domain --remove-all-storage
virsh undefine grafana.$dns_domain --remove-all-storage

echo "Removing Monitor nodes"
for mon in `seq -w 01 03`; do
  virsh destroy ceph-mon$mon.$dns_domain
  virsh undefine ceph-mon$mon.$dns_domain --remove-all-storage
done

echo "Removing OSD nodes"
for i in `seq -w 01 04`; do
  virsh destroy ceph-t1-osd$i.$dns_domain
  virsh destroy ceph-t2-osd$i.$dns_domain
  virsh undefine ceph-t1-osd$i.$dns_domain --remove-all-storage
  virsh undefine ceph-t2-osd$i.$dns_domain --remove-all-storage
done

echo "Removing other nodes"
for i in `seq -w 01 02`; do
  virsh destroy ceph-rgw$i.$dns_domain
  virsh destroy ceph-mds$i.$dns_domain
  virsh destroy ceph-iscsi$i.$dns_domain
  virsh undefine ceph-rgw$i.$dns_domain --remove-all-storage
  virsh undefine ceph-mds$i.$dns_domain --remove-all-storage
  virsh undefine ceph-iscsi$i.$dns_domain --remove-all-storage
done

# Remove ifcfg files

echo "Removing monitor ifcfg files"
for mon in `seq -w 01 03`; do
  rm $tmp_dir/ceph-mon$mon -rf
  rm $tmp_dir/ceph-mds$mon -rf
  rm $tmp_dir/ceph-iscsi$mon -rf
  rm $tmp_dir/ceph-rgw$mon -rf
done

echo "Removing OSD ifcfg files"
for t in 1 2; do
  for i in `seq -w 01 04`; do
    rm $tmp_dir/ceph-t$t-osd$i -rf
  done
done

# Remove Network files

echo "Removing ceph-presentation xml file"

rm $tmp_dir/ceph-presentation.xml -rf

echo "Removing ceph-replicaton xml file"

echo "Removing ceph networks in libvirt"

for network in ceph-presentation ceph-replication; do
  virsh net-destroy $network
  virsh net-undefine $network
done

Ceph Install⌗

Requirements⌗

This guide will use cephadm so requires these steps before starting

Podman or Docker
Chrony or NTP
LVM2

Example Ansible inventory file for confirming and setting up requirements.

yaml inventory.yaml


---

ceph:
  hosts:
    bastion.ceph.lab:
      ansible_host: 10.44.20.90
    grafana.ceph.lab:
      ansible_host: 10.44.20.16
    ceph-mon01.ceph.lab:
      ansible_host: 10.44.20.21
    ceph-mon02.ceph.lab:
      ansible_host: 10.44.20.22
    ceph-mon03.ceph.lab:
      ansible_host: 10.44.20.23
    ceph-t1-osd01.ceph.lab:
      ansible_host: 10.44.20.31
    ceph-t1-osd02.ceph.lab:
      ansible_host: 10.44.20.32
    ceph-t1-osd03.ceph.lab:
      ansible_host: 10.44.20.33
    ceph-t1-osd04.ceph.lab:
      ansible_host: 10.44.20.34
    ceph-t2-osd01.ceph.lab:
      ansible_host: 10.44.20.41
    ceph-t2-osd02.ceph.lab:
      ansible_host: 10.44.20.42
    ceph-t2-osd03.ceph.lab:
      ansible_host: 10.44.20.43
    ceph-t2-osd04.ceph.lab:
      ansible_host: 10.44.20.44
    ceph-rgw01.ceph.lab:
      ansible_host: 10.44.20.111
    ceph-rgw02.ceph.lab:
      ansible_host: 10.44.20.112

This playbook will do the below requirement steps. Also available on GitHub

Enable and start chronyd service

bash


# ansible -i inventory.yaml all -m service -a "name=chronyd state=started enabled=true"

Confirm chrony is working

bash


# ansible -i inventory.yaml all -m shell -a "chronyc tracking"

Install podman

bash


# ansible -i inventory.yaml all -m package -a "name=podman state=installed"

Ensure python3 is installed

bash


# ansible -i inventory.yaml all -m package -a "name=python3 state=installed"

Requirements Playbook⌗

yaml requirements-playbook.yaml


---

- name: Ceph Lab Requirements
  hosts: all
  gather_facts: false
  tasks:
    - name: Ensure packages are installed
      package:
        name: "{{ item }}"
        state: installed
      loop:
        - podman
        - chrony
        - python3
        - lvm2
    - name: Start and enable chronyd
      service:
        name: chronyd
        state: started
        enabled: true
    - name: Build hosts file
      lineinfile: 
        dest: /etc/hosts
        regexp: '.*{{ item }}$'
        line: "{{ hostvars[item]['ansible_host'] }} {{ hostvars[item]['inventory_hostname_short'] }} {{item}}"
        state: present
      with_items: "{{ groups['all'] }}"

Cephadm⌗

Following steps are run from the ceph-mon01.ceph.lab node

This section is described in detail on the Ceph Docs Site

Get the latest version of cephadm

bash


# curl --silent --remote-name --location https://github.com/ceph/ceph/raw/octopus/src/cephadm/cephadm

Make cephadm executable

bash


# chmod +x cephadm

Install cephadm

bash


# ./cephadm add-repo --release octopus
# ./cephadm install
# which cephadm
/usr/sbin/cephadm
# cephadm install ceph-common

Bootstrap a New Cluster⌗

Ensure /etc/ceph exists on the first node.

bash


# mkdir -p /etc/ceph

Then bootstrap the first monitor node. Full details of what this does can be found here. This will skip the monitoring stack as it will be deployed later to it’s own node.

bash


# cephadm bootstrap --mon-ip 10.44.20.21 --skip-monitoring-stack

Demo

Confirm that the ceph command works from the first monitor node

bash


# ceph -v
ceph version 15.2.8 (bdf3eebcd22d7d0b3dd4d5501bee5bac354d5b55) octopus (stable)
# ceph status
  cluster:
    id:     5af2c430-5198-11eb-94c6-525400613ffc
    health: HEALTH_WARN
            OSD count 0 < osd_pool_default_size 3
 
  services:
    mon: 1 daemons, quorum ceph-mon01.ceph.lab (age 11m)
    mgr: ceph-mon01.ceph.lab.lszgjg(active, since 9m)
    osd: 0 osds: 0 up, 0 in
 
  data:
    pools:   0 pools, 0 pgs
    objects: 0 objects, 0 B
    usage:   0 B used, 0 B / 0 B avail
    pgs:

Set the cluster_network CIDR in ceph config

bash


# ceph config set global cluster_network 172.16.20.0/24

Reconfigure the daemons

bash


# ceph orch daemon reconfig mon.ceph-mon01
Scheduled to reconfig mon.ceph-mon01 on host 'ceph-mon01'

For this lab, the number of monitors will be set to 3 and set the monitor network

bash


# ceph config set mon public_network 10.44.20.0/24
# ceph orch apply mon 3
Scheduled mon update...

Copy Ceph’s ssh public key to the new node’s root user’s authorized_keys file

bash


# ssh-copy-id -f -i /etc/ceph/ceph.pub root@10.44.20.22

Or with Ansible

yaml ssh-key.yaml


---

- name: Fetch bootstraped ssh key
  hosts: ceph-mon01.ceph.lab
  gather_facts: false
  tasks:
  - name: Grab ceph.pub key and store it
    fetch:
      src: /etc/ceph/ceph.pub
      dest: /tmp/ceph.pub
      flat: yes

- name: Add key to all nodes
  hosts: all
  gather_facts: false
  tasks:
    - name: Ensure key is in roots authorized_key file
      authorized_key:
        user: root
        key: "{{ lookup('file', '/tmp/ceph.pub') }}"
        state: present

Add Monitor Nodes to the Cluster⌗

Add the 2 remaining monitors to the cluster

bash


# ceph orch host add ceph-mon02
Added host 'ceph-mon02'

# ceph orch host add ceph-mon03
Added host 'ceph-mon03'

# ceph orch host label add ceph-mon01 mon
Added label mon to host ceph-mon01

# ceph orch host label add ceph-mon02 mon
Added label mon to host ceph-mon02

# ceph orch host label add ceph-mon03 mon
Added label mon to host ceph-mon03

# ceph orch host ls
HOST                 ADDR                 LABELS  STATUS                          
ceph-mon01.ceph.lab  ceph-mon01.ceph.lab  mon                                     
ceph-mon02.ceph.lab  ceph-mon02.ceph.lab  mon                                     
ceph-mon03.ceph.lab  ceph-mon03.ceph.lab  mon

Tell cephadm to deploy monitor daemons to nodes matching the mon label.

bash


# ceph orch apply mon label:mon
Scheduled mon update...

Ceph status should now show 3 monitors in the cluster

bash


# ceph -s
  cluster:
    id:     5af2c430-5198-11eb-94c6-525400613ffc
    health: HEALTH_WARN
            OSD count 0 < osd_pool_default_size 3
 
  services:
    mon: 3 daemons, quorum ceph-mon01.ceph.lab,ceph-mon03,ceph-mon02 (age 3m)
    mgr: ceph-mon01.ceph.lab.lszgjg(active, since 7m), standbys: ceph-mon02.nmvtji
    osd: 0 osds: 0 up, 0 in
 
  data:
    pools:   0 pools, 0 pgs
    objects: 0 objects, 0 B
    usage:   0 B used, 0 B / 0 B avail
    pgs:

Add OSD Nodes to the Cluster⌗

Add the nodes into the cluster

bash


# for i in $(grep osd /etc/hosts | awk '{print $2}'); do ceph orch host add $i; done
Added host 'ceph-t1-osd01'
Added host 'ceph-t1-osd02'
Added host 'ceph-t1-osd03'
Added host 'ceph-t1-osd04'
Added host 'ceph-t2-osd01'
Added host 'ceph-t2-osd02'
Added host 'ceph-t2-osd03'
Added host 'ceph-t2-osd04'

# for i in $(grep osd /etc/hosts | awk '{print $2}'); do ceph orch host label add $i osd; done
Added label osd to host ceph-t1-osd01
Added label osd to host ceph-t1-osd02
Added label osd to host ceph-t1-osd03
Added label osd to host ceph-t1-osd04
Added label osd to host ceph-t2-osd01
Added label osd to host ceph-t2-osd02
Added label osd to host ceph-t2-osd03
Added label osd to host ceph-t2-osd04

# ceph orch host ls
HOST                    ADDR                    LABELS  STATUS  
ceph-mon01.ceph.lab     ceph-mon01.ceph.lab     mon             
ceph-mon02.ceph.lab     ceph-mon02.ceph.lab     mon             
ceph-mon03.ceph.lab     ceph-mon03.ceph.lab     mon             
ceph-t1-osd01.ceph.lab  ceph-t1-osd01.ceph.lab  osd             
ceph-t1-osd02.ceph.lab  ceph-t1-osd02.ceph.lab  osd             
ceph-t1-osd03.ceph.lab  ceph-t1-osd03.ceph.lab  osd             
ceph-t1-osd04.ceph.lab  ceph-t1-osd04.ceph.lab  osd             
ceph-t2-osd01.ceph.lab  ceph-t2-osd01.ceph.lab  osd             
ceph-t2-osd02.ceph.lab  ceph-t2-osd02.ceph.lab  osd             
ceph-t2-osd03.ceph.lab  ceph-t2-osd03.ceph.lab  osd             
ceph-t2-osd04.ceph.lab  ceph-t2-osd04.ceph.lab  osd

Check ceph orch can see all the available devices (This may take a few minutes)

bash


# ceph orch device ls
Hostname                Path      Type  Serial  Size   Health   Ident  Fault  Available  
ceph-t1-osd01.ceph.lab  /dev/vdb  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd01.ceph.lab  /dev/vdc  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd01.ceph.lab  /dev/vdd  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd01.ceph.lab  /dev/vde  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd02.ceph.lab  /dev/vdb  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd02.ceph.lab  /dev/vdc  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd02.ceph.lab  /dev/vdd  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd02.ceph.lab  /dev/vde  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd03.ceph.lab  /dev/vdb  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd03.ceph.lab  /dev/vdc  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd03.ceph.lab  /dev/vdd  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd03.ceph.lab  /dev/vde  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd04.ceph.lab  /dev/vdb  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd04.ceph.lab  /dev/vdc  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd04.ceph.lab  /dev/vdd  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t1-osd04.ceph.lab  /dev/vde  hdd           5368M  Unknown  N/A    N/A    Yes        
ceph-t2-osd01.ceph.lab  /dev/vdb  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd01.ceph.lab  /dev/vdc  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd01.ceph.lab  /dev/vdd  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd01.ceph.lab  /dev/vde  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd02.ceph.lab  /dev/vdb  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd02.ceph.lab  /dev/vdc  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd02.ceph.lab  /dev/vdd  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd02.ceph.lab  /dev/vde  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd03.ceph.lab  /dev/vdb  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd03.ceph.lab  /dev/vdc  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd03.ceph.lab  /dev/vdd  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd03.ceph.lab  /dev/vde  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd04.ceph.lab  /dev/vdb  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd04.ceph.lab  /dev/vdc  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd04.ceph.lab  /dev/vdd  hdd           10.7G  Unknown  N/A    N/A    Yes        
ceph-t2-osd04.ceph.lab  /dev/vde  hdd           10.7G  Unknown  N/A    N/A    Yes

Finally tell Ceph to consume any available and unused storage device

bash


# ceph orch apply osd --all-available-devices
Scheduled osd.all-available-devices update...

This is should then be visable by watching Ceph status. This process can take some time.

bash


# ceph status
  cluster:
    id:     5af2c430-5198-11eb-94c6-525400613ffc
    health: HEALTH_OK
 
  services:
    mon: 3 daemons, quorum ceph-mon01.ceph.lab,ceph-mon03,ceph-mon02 (age 47s)
    mgr: ceph-mon01.ceph.lab.lszgjg(active, since 39m)
    osd: 32 osds: 32 up (since 9m), 32 in (since 9m)
 
  data:
    pools:   1 pools, 1 pgs
    objects: 0 objects, 0 B
    usage:   32 GiB used, 208 GiB / 240 GiB avail
    pgs:     1 active+clean

Add Rados Gateway⌗

For other daemon types, Ceph docs details how to configure them.

Add and label the Rados Gateway hosts

bash


# ceph orch host add ceph-rgw01
Added host 'ceph-rgw01'

# ceph orch host add ceph-rgw02
Added host 'ceph-rgw02'

# ceph orch host label add ceph-rgw01 rgw
Added label rgw to host ceph-rgw01

# ceph orch host label add ceph-rgw02 rgw
Added label rgw to host ceph-rgw02

# ceph orch host ls
HOST                    ADDR                    LABELS  STATUS  
ceph-mon01.ceph.lab     ceph-mon01.ceph.lab     mon             
ceph-mon02.ceph.lab     ceph-mon02.ceph.lab     mon             
ceph-mon03.ceph.lab     ceph-mon03.ceph.lab     mon             
ceph-rgw01.ceph.lab     ceph-rgw01.ceph.lab     rgw             
ceph-rgw02.ceph.lab     ceph-rgw02.ceph.lab     rgw             
ceph-t1-osd01.ceph.lab  ceph-t1-osd01.ceph.lab  osd             
ceph-t1-osd02.ceph.lab  ceph-t1-osd02.ceph.lab  osd             
ceph-t1-osd03.ceph.lab  ceph-t1-osd03.ceph.lab  osd             
ceph-t1-osd04.ceph.lab  ceph-t1-osd04.ceph.lab  osd             
ceph-t2-osd01.ceph.lab  ceph-t2-osd01.ceph.lab  osd             
ceph-t2-osd02.ceph.lab  ceph-t2-osd02.ceph.lab  osd             
ceph-t2-osd03.ceph.lab  ceph-t2-osd03.ceph.lab  osd             
ceph-t2-osd04.ceph.lab  ceph-t2-osd04.ceph.lab  osd

Configure the RGW and define the nodes the daemon needs to run on.

In this example test is the realm-name and uk-west is the zone-name

bash


# ceph orch apply rgw test uk-west --placement="2 label:rgw"
Scheduled rgw.test.uk-west update...

Once again watching Ceph health will show when this operation has completed.

bash


# ceph status
  cluster:
    id:     5af2c430-5198-11eb-94c6-525400613ffc
    health: HEALTH_OK
 
  services:
    mon: 3 daemons, quorum ceph-mon01.ceph.lab,ceph-mon03,ceph-mon02 (age 13m)
    mgr: ceph-mon01.ceph.lab.lszgjg(active, since 90m)
    osd: 32 osds: 32 up (since 60m), 32 in (since 60m)
    rgw: 2 daemons active (test.uk-west.ceph-rgw01.ouliyb, test.uk-west.ceph-rgw02.zbzdaj)
 
  task status:
 
  data:
    pools:   5 pools, 105 pgs
    objects: 202 objects, 7.2 KiB
    usage:   33 GiB used, 207 GiB / 240 GiB avail
    pgs:     105 active+clean

Configure Monitoring⌗

If there is a desire to move these daemons to their own node or if --skip-monitoring-stack was used to bootstrap the cluster.

Add the grafana node into the Ceph cluster

bash


# ceph orch host add grafana.ceph.lab
Added host 'grafana'

# ceph orch host label add grafana.ceph.lab grafana
Added label grafana to host grafana.ceph.lab

Remove any pre-installed monitoring (Not required if --skip-monitoring-stack was used.

bash


# ceph orch rm grafana
Removed service grafana
# ceph orch rm prometheus --force
Removed service prometheus

# ceph orch rm node-exporter
Removed service node-exporter

# ceph orch rm alertmanager
Removed service alertmanager

# ceph mgr module disable prometheus

Enable monitoring stack with placement selectors

bash


# ceph mgr module enable prometheus

# ceph orch apply node-exporter '*'
Scheduled node-exporter update...

# ceph orch apply alertmanager 1 --placement="label:grafana"
Scheduled alertmanager update...

# ceph orch apply prometheus 1 --placement="label:grafana"
Scheduled prometheus update...

# ceph orch apply grafana 1 --placement="label:grafana"
Scheduled grafana update...

Confirm monitoring services are running on the desired node

bash


# podman ps --format "{{.Names}}"
ceph-5af2c430-5198-11eb-94c6-525400613ffc-grafana.grafana
ceph-5af2c430-5198-11eb-94c6-525400613ffc-prometheus.grafana
ceph-5af2c430-5198-11eb-94c6-525400613ffc-alertmanager.grafana
ceph-5af2c430-5198-11eb-94c6-525400613ffc-node-exporter.grafana
ceph-5af2c430-5198-11eb-94c6-525400613ffc-crash.grafana

Get the Grafana details

bash


# ceph dashboard get-grafana-api-url
https://grafana.ceph.lab:3000
# ceph dashboard get-grafana-api-username
admin
# ceph dashboard get-grafana-api-password
admin

Conclusion⌗

At this point there should be a running ceph cluster at release Octopus with, optionally 2 Rados Gateway nodes and the associated pools. This lab will be the starting point for further ceph labs.

To reset the ceph dashboard admin password⌗

bash


# ceph dashboard ac-user-set-password admin password

Add an S3 user⌗

bash


# radosgw-admin user create --uid=demo --display-name="Demo User"

json Output


{
    "user_id": "demo",
    "display_name": "Demo User",
    "email": "",
    "suspended": 0,
    "max_buckets": 1000,
    "subusers": [],
    "keys": [
        {
            "user": "demo",
            "access_key": "4IMSY2D3RPWW7VB7ECPB",
            "secret_key": "7AuFEvU9HKa4WB6BjfuTlZEDv6t1oHKhQ01zmIDo"
        }
    ],
    "swift_keys": [],
    "caps": [],
    "op_mask": "read, write, delete",
    "default_placement": "",
    "default_storage_class": "",
    "placement_tags": [],
    "bucket_quota": {
        "enabled": false,
        "check_on_raw": false,
        "max_size": -1,
        "max_size_kb": 0,
        "max_objects": -1
    },
    "user_quota": {
        "enabled": false,
        "check_on_raw": false,
        "max_size": -1,
        "max_size_kb": 0,
        "max_objects": -1
    },
    "temp_url_keys": [],
    "type": "rgw",
    "mfa_ids": []
}

Cleanup⌗

Cleanup for this lab is detailed in this section which will remove all the VMs and their storage volumes.

Ceph Octopus on CentOS 8 Stream Lab

Contents

Summary⌗

Setup VMs⌗

Detailed Setup⌗

Create Networks⌗

Create VM Example⌗

Quick Setup⌗

Demo⌗

Adding More Disks⌗

Cleanup⌗

Ceph Install⌗

Requirements⌗

Requirements Playbook⌗

Cephadm⌗

Bootstrap a New Cluster⌗

Add Monitor Nodes to the Cluster⌗

Add OSD Nodes to the Cluster⌗

Add Rados Gateway⌗

Configure Monitoring⌗

Conclusion⌗

To reset the ceph dashboard admin password⌗

Add an S3 user⌗

Cleanup⌗