An introduction to SQL Server on Red Hat Enterprise Linux.

1. Introduction to
SQL Server on RHEL
@TanakaTakayoshi
2018 July ver1

2. AGENDA
Quick Start SQL Server
Why SQL Server on RHEL?
Quick Troubleshooting
Monitoring
Active Directory Authentication
High Availability Basis

3. DEMO
RUN SQL SERVER AS A CONTAINER & CONNECT FROM
SQL SERVER OPS STUDIO

4. Why SQL Server on
RHEL?

5. High Performance

6. Supported Platform
Windows Server/Windows Desktop
Red Hat Enterprise Linux 7.3+
SUSE Enterprise Linux SLES v12 SP2
Ubuntu 16.04 LTS
Docker:
◦ Windows & Linux (Ubuntu) image
◦ RHEL base image is planning via Microsoft Container Catalog (MCR)
https://docs.microsoft.com/en-us/sql/sql-server/install/hardware-and-software-requirements-
for-installing-sql-server?view=sql-server-2017
https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-setup?view=sql-server-linux-
2017&viewFallbackFrom=sql-server-2017#system
https://azure.microsoft.com/en-us/blog/microsoft-syndicates-container-catalog/

7. architecture
Linux Kernel
Linux Process
Linux Host Extension
SQL PAL Managed
SQL OS v2
SQL OS
Direct API
Win 32 like APIs
Software Isolated Process
SQL Server Database Engine SSIS
Linux OS call
ABI call

8. Install & Update
Fully managed by Linux package manager (yum, dnf, apt-get …)
Install example
Update example
$ sudo curl -o /etc/yum.repos.d/mssql-server.repo
https://packages.microsoft.com/config/rhel/7/mssql-server-2017.repo
$ sudo yum install -y mssql-server
$ sudo /opt/mssql/bin/mssql-conf setup
$ sudo yum update mssql-server

9. Container
Available on DockerHub (Ubuntu based image)
For RHEL based image, feel free to use my Docker file and build from scratch.
https://github.com/tanaka-takayoshi/mssql-docker-rhel
$ sudo docker pull microsoft/mssql-server-linux:2017-latest
$ sudo docker run -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=<YourStrong!Passw0rd>'
-p 1433:1433 --name sql1
-d microsoft/mssql-server-linux:2017-latest
$ sudo docker exec -it sql1 "bash"
# /opt/mssql-tools/bin/sqlcmd -S localhost -U SA -P '<YourNewStrong!Passw0rd>'

10. Tools (Linux)
sqlcmd: command line interface. Intended to execute automate script.
◦ https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-setup-tools?view=sql-server-
linux-2017
bcp: command line data import/export
◦ https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-migrate-bcp?view=sql-server-
linux-2017
mssql-cli (preview): dialog query execute with CLI.
◦ https://github.com/dbcli/mssql-cli
Visual Studio Code Extension: Query with auto completion & execution.
◦ https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-develop-use-vscode?view=sql-
server-linux-2017
SQL Operation Studio: x-platform GUI management tool
◦ https://github.com/microsoft/sqlopsstudio/

11. Linux & Windows
Linux
Windows
Linux
Windows
SQL
Server
SQL
Server

12. Troubleshoot

13. Service, Process, Directory
/opt/mssql: binary owner:root
/var/opt/mssql: database file. Log file owner:mssql
mssql-server service

14. Demo
SOSREPORT

15. sosreport
PR is merged to upstream.
◦ https://github.com/sosreport/sos/pull/1326
Collecting following information
◦ mssql.conf
◦ Logs
◦ keytab when AD authentication enabled

16. Security

17. AD Authentication
Default authentication: password
AD authentication: password-less authentication from the AD-joined computer/user
◦ Requires Active Directory rather than LDAP
◦ Administrator can centralize user identity management in to AD.
https://docs.microsoft.com/ja-jp/sql/linux/sql-server-linux-active-directory-
authentication?view=sql-server-linux-2017

18. Demo
AD AUTHENTICATION

19. Troubleshooting
SPN configuration (setspn) in Active Directory
◦ Check with “Get-ADUser” and “setspn –l mssql” command
klist command with Keytab file in SQL Server on RHEL server
◦ klist -e -k /var/opt/mssql/secrets/mssql.keytab
Kerberos (id, kinit) in client RHEL
◦ klist shows the user credential.
SSSD logs
◦ Check sosreport
Debug logging
◦ Add /var/opt/mssql/logger.ini
[Output:File]
Type = File
Filename = /var/opt/mssql/log/trace.log
[Output:SecFile]
Type = File
Filename = /var/opt/mssql/log/security.log
[Logger]
Level = Debug
Outputs = File
[Logger.security.kerberos]
Level = Debug
Outputs = SecFile

20. High Availability

21. Cluster/HA options
Failover Cluster Instance (FCI)
◦ Active/Standby
◦ Shared Storage: iSCSI, NFS, SMB
◦ RHEL HA Addon
AlwaysOn Availability Groups
◦ Primary/Secondary (and more). Read Replica can be included.
◦ Local Storage
◦ RHEL HA Addon
High Availability on kubernetes/OpenShift
◦ Will be released.
◦ Kubernetes/OpenShift integrated HA service

22. FCI
RHEL RHEL
Shared Disk (iSCSI, NFS, SMB)
HA add on
(pacemaker, pcs)
HA add on
(pacemaker, pcs)
SQL Server
(Active)
SQL Server
(Standby)

23. AlwaysOn Availability Group
RHEL RHEL
Local Disk
HA add on
(pacemaker, pcs, fence)
HA add on
(pacemaker, pcs, fence)
SQL Server
(Primary)
SQL Server
(Secondary)
Local Disk
VIP

24. STONITH
Shoot The Other Node In The Head (STONITH)
RHEL
HA add on
SQL Server
failover
RHEL HA add-on now
supports STONITH (fence
operation) on Azure.

25. References
de:code 2018 DA06 SQL Server 管理者におくる SQL Server on Linux Tips
docs.microsoft.com SQL Server on Linux
Technical support policy for Microsoft SQL Server
Support Policies for RHEL High Availability Clusters
mssql-server-ha GitHub repository
Microsoft Build 2018 Enhancing DevOps with SQL Server on Linux + containers
Microsoft Build 2018 Looking ahead with SQL Operations Studio
SQL Server on Linux : Troubleshooting tips and tricks
SQL Server on Linux Engineering Town Hall
◦ Please google and register. Then you can see videos on demand.