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--- progetti:cloud-veneto:operations:zfs_howto [2019/11/05 10:57] – cresce@infn.it
+++ progetti:cloud-veneto:operations:zfs_howto [2019/12/20 12:12] (current) – cresce@infn.it
@@ Line 1: / Line 1: @@
+====== ZFS Howto ======
+===== Replace failed disk =====
+# Remove the failed disk and insert a new one
+# Initialize Disk
+<code bash>
+/sbin/sgdisk /dev/sdb -g -U R
+</code>
+# Copy the partition table from /dev/sda to /dev/sdb
+<code bash>
+sgdisk --replicate=/dev/sdb /dev/sda
+sgdisk --randomize-guids /dev/sdb
+</code>
+# Install Grub on the new disk
+<code bash>
+grub-install /dev/sdb
+zpool list
+zpool status -x
+</code>
+# Replace the disk in the rpool pool
+<code bash>
+zpool replace rpool /dev/sdb2
+zpool status -x
+</code>
+# Scrub rpool pool
+<code bash>
+zpool scrub rpool
+</code>
+===== Monitoring ZFS with nagios =====
+==== Client ====
+#Install sudo:
+Debian
+<code bash>
+apt-get install sudo
+</code>
+CentOS 6/7
+<code bash>
+yum install sudo
+</code>
+Create /etc/sudoers.d/zfs file or append if file already exist, the following lines:
+<code bash>
+nagios ALL=NOPASSWD: /sbin/zfs
+nagios ALL=NOPASSWD: /sbin/zpool
+</code>
+Create nagios account
+<code bash>
+addgroup --gid 50310 nagios
+adduser --uid 50310 --gid 50310 --home /home/nagios --no-create-home nagios
+scp -r <template_host>:/home/nagios /home
+chown -R nagios:nagios /home/nagios
+</code>
+Copy ZFS check script on /usr/local/bin/check_zfs.py from cld-nagios
+<code bash>
+scp ~/check_zfs.py <hostname>:/usr/local/bin/
+</code>
+==== Server ====
+Edit nagios config file
+<code bash>
+define service{
+       use                             server-ssh-service         ; Name of service template to use
+       host_name                       <hostname>
+       service_description             ZFS
+       check_command                   check_remote_zfs!rpool
+       }
+</code>
+===== Monitoring smart with nagios =====
+==== Client ====
+#Install sudo:
+Debian
+<code bash>
+apt-get install sudo
+</code>
+CentOS 6/7
+<code bash>
+yum install sudo
+</code>
+Copy smart check script into /usr/local/bin/check_smartmon.py from cld-nagios
+<code bash>
+scp ~/check_smartmon.py <hostname>:/usr/local/bin/
+</code>
+Create /etc/sudoers.d/check-smartmon file or append if file already exist, the following lines:
+<code bash>
+nagios ALL=NOPASSWD: /usr/local/bin/check_smartmon.py
+</code>
+==== Server ====
+Edit nagios config file
+<code bash>
+define service{
+        use                             server-ssh-service         ; Name of service template to use
+        host_name                       <hostname>
+        service_description             Disk_Smart_sda
+        check_command                   check_remote_smartmon!/dev/sda
+        }
+</code>