Mssql

storage 설정

---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mssql-primary
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mssql-secondary1
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mssql-secondary2
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi

secret 설정

apiVersion: v1
kind: Secret
metadata:
  name: mssql-secret
type: Opaque
data:
  SA_PASSWORD: S2ltY2xxxx=

primary deploy

apiVersion: apps/v1
kind: Deployment
metadata:
  name: primary-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mssql-primary
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mssql-primary
    spec:
      terminationGracePeriodSeconds: 10
      securityContext:
        fsGroup: 1000
      hostname: mssql-primary
      containers:
        - name: mssql-primary
          image: mcr.microsoft.com/mssql/rhel/server:2019-latest
          env:
            - name: ACCEPT_EULA
              value: 'Y'
            - name: MSSQL_PID
              value: 'Developer'
            - name: MSSQL_ENABLE_HADR
              value: '1'
            - name: MSSQL_AGENT_ENABLED
              value: 'true'
            - name: MSSQL_SA_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mssql-secret
                  key: SA_PASSWORD
          resources:
            limits:
              memory: 4G
          volumeMounts:
            - name: mssqldb
              mountPath: /var/opt/mssql
      volumes:
        - name: mssqldb
          persistentVolumeClaim:
            claimName: mssql-primary
---
# Create the load balancing service
apiVersion: v1
kind: Service
metadata:
  name: mssql-primary
spec:
  selector:
    app: mssql-primary
  ports:
    - name: sqlserver
      port: 1433
      targetPort: 1433
    - name: endpoint
      port: 5022
      targetPort: 5022
  type: LoadBalancer

secondary1 deploy

apiVersion: apps/v1
kind: Deployment
metadata:
  name: secondary1-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mssql-secondary1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mssql-secondary1
    spec:
      terminationGracePeriodSeconds: 10
      securityContext:
        fsGroup: 1000
      hostname: mssql-secondary1
      containers:
        - name: mssql-secondary1
          image: mcr.microsoft.com/mssql/rhel/server:2019-latest
          env:
            - name: ACCEPT_EULA
              value: 'Y'
            - name: MSSQL_PID
              value: 'Developer'
            - name: MSSQL_ENABLE_HADR
              value: '1'
            - name: MSSQL_AGENT_ENABLED
              value: 'true'
            - name: MSSQL_SA_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mssql-secret
                  key: SA_PASSWORD
          resources:
            limits:
              memory: 4G
          volumeMounts:
            - name: mssqldb
              mountPath: /var/opt/mssql
      volumes:
        - name: mssqldb
          persistentVolumeClaim:
            claimName: mssql-secondary1
---
apiVersion: v1
kind: Service
metadata:
  name: mssql-secondary1
spec:
  selector:
    app: mssql-secondary1
  ports:
    - name: sqlserver
      port: 1433
      targetPort: 1433
    - name: endpoint
      port: 5022
      targetPort: 5022
  type: LoadBalancer

secondary2 deploy

apiVersion: apps/v1
kind: Deployment
metadata:
  name: secondary2-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mssql-secondary2
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mssql-secondary2
    spec:
      terminationGracePeriodSeconds: 10
      securityContext:
        fsGroup: 1000
      hostname: mssql-secondary2
      containers:
        - name: mssql-secondary2
          image: mcr.microsoft.com/mssql/rhel/server:2019-latest
          env:
            - name: ACCEPT_EULA
              value: 'Y'
            - name: MSSQL_PID
              value: 'Developer'
            - name: MSSQL_ENABLE_HADR
              value: '1'
            - name: MSSQL_AGENT_ENABLED
              value: 'true'
            - name: MSSQL_SA_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mssql-secret
                  key: SA_PASSWORD
          resources:
            limits:
              memory: 4G
          volumeMounts:
            - name: mssqldb
              mountPath: /var/opt/mssql
      volumes:
        - name: mssqldb
          persistentVolumeClaim:
            claimName: mssql-secondary2
---
apiVersion: v1
kind: Service
metadata:
  name: mssql-secondary2
spec:
  selector:
    app: mssql-secondary2
  ports:
    - name: sqlserver
      port: 1433
      targetPort: 1433
    - name: endpoint
      port: 5022
      targetPort: 5022
  type: LoadBalancer

접속테스트

kubectl get svc

잘 된다.

Primary Availablitity Group 설정

-- Create AG test database
USE [master]
GO
CREATE DATABASE DevTestAG
GO
USE [DevTestAG]
GO
CREATE TABLE Customers([CustomerID] int NOT NULL, [CustomerName] varchar(30) NOT NULL)
GO
INSERT INTO Customers (CustomerID, CustomerName) VALUES (30,'CANNON TOOLS'),(90,'INTERNATIONAL BANK'),(130,'SUN DIAL CITRUS')
-- Change DB recovery model to Full and take full backup
ALTER DATABASE [DevTestAG] SET RECOVERY FULL ;
GO
BACKUP DATABASE [DevTestAG] TO  DISK = N'/var/opt/mssql/backup/DevTestAG.bak' WITH NOFORMAT, NOINIT,  NAME = N'DevTestAG-Full Database Backup', SKIP, NOREWIND, NOUNLOAD,  STATS = 10
GO
USE [master]
GO
--create logins for AG
CREATE LOGIN ag_login WITH PASSWORD = 'AGPa55w0rd';
CREATE USER ag_user FOR LOGIN ag_login;
-- Create a master key and certificate
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'AGPa55w0rd';
GO
CREATE CERTIFICATE ag_certificate WITH SUBJECT = 'ag_certificate';
-- Copy these two files to the same directory on secondary replicas
BACKUP CERTIFICATE ag_certificate
TO FILE = '/var/opt/mssql/ag_certificate.cert'
WITH PRIVATE KEY (
        FILE = '/var/opt/mssql/ag_certificate.key',
        ENCRYPTION BY PASSWORD = 'AGPa55w0rd'
    );
GO
-- Create AG endpoint on port 5022
CREATE ENDPOINT [AG_endpoint]
STATE=STARTED
AS TCP (
    LISTENER_PORT = 5022,
    LISTENER_IP = ALL
)
FOR DATA_MIRRORING (
    ROLE = ALL,
    AUTHENTICATION = CERTIFICATE ag_certificate,
    ENCRYPTION = REQUIRED ALGORITHM AES
)
--Create AG primary replica
CREATE AVAILABILITY GROUP [K8sAG]
WITH (
    CLUSTER_TYPE = NONE
)
FOR REPLICA ON
N'mssql-primary' WITH
(
    ENDPOINT_URL = N'tcp://mssql-primary:5022',
    AVAILABILITY_MODE = SYNCHRONOUS_COMMIT,
    SEEDING_MODE = AUTOMATIC,
    FAILOVER_MODE = MANUAL,
    SECONDARY_ROLE (ALLOW_CONNECTIONS = ALL)
),
N'mssql-secondary1' WITH
(
    ENDPOINT_URL = N'tcp://mssql-secondary1:5022',
    AVAILABILITY_MODE = SYNCHRONOUS_COMMIT,
    SEEDING_MODE = AUTOMATIC,
    FAILOVER_MODE = MANUAL,
    SECONDARY_ROLE (ALLOW_CONNECTIONS = ALL)
),
N'mssql-secondary2' WITH
(
    ENDPOINT_URL = N'tcp://mssql-secondary2:5022',
    AVAILABILITY_MODE = ASYNCHRONOUS_COMMIT,
    SEEDING_MODE = AUTOMATIC,
    FAILOVER_MODE = MANUAL,
    SECONDARY_ROLE (ALLOW_CONNECTIONS = ALL)
);

-- Add database to AG
USE [master]
GO
ALTER AVAILABILITY GROUP [K8sAG] ADD DATABASE [DevTestAG]
GO

AG_endpoint 생성 확인

copy certificate from primary to secondary

# Copy the certificates from the AG primary

# Retreive the pod anmes to variables
# Retrieve pod name to variable
primary=$(kubectl get pods | grep primary | awk '{print $1}')
secondary1=$(kubectl get pods | grep secondary1 | awk '{print $1}')
secondary2=$(kubectl get pods | grep secondary2 | awk '{print $1}')

echo $primary
> primary-deployment-c5b5454f6-hsfsm

echo $secondary1
> secondary1-deployment-c7559dd7d-jkt5n

echo $secondary2
> secondary2-deployment-6579d765b8-cx89s

# primary to local
ag_certificate.cert
kubectl cp $primary:/var/opt/mssql/ag_certificate.key ag_certificate.key

# local to secondary1
kubectl cp ag_certificate.cert  $secondary1:/var/opt/mssql
kubectl cp ag_certificate.key  $secondary1:/var/opt/mssql

# local to secondary2
kubectl cp ag_certificate.cert $secondary2:/var/opt/mssql
kubectl cp ag_certificate.key $secondary2:/var/opt/mssql

생긴 cert를 확인해보니 같은 결과가 나온다.

openssl x509 -inform der -in ag_certificate.cert -text -noout

1년짜리 인증서임

인증서를 나중에는 연장해야겟다.

secondary1 설정

USE [master]
GO
--Create login for AG
-- It should match the password from the primary script
CREATE LOGIN ag_login WITH PASSWORD = 'AGPa55w0rd';
CREATE USER ag_user FOR LOGIN ag_login;

-- Create the certificate using the certificate file created in the primary node
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'AGPa55w0rd';
GO
-- Create from copied cert - the password must match the primary
CREATE CERTIFICATE ag_certificate
    AUTHORIZATION ag_user
    FROM FILE = '/var/opt/mssql/ag_certificate.cert'
    WITH PRIVATE KEY (
    FILE = '/var/opt/mssql/ag_certificate.key',
    DECRYPTION BY PASSWORD = 'AGPa55w0rd'
)
GO
--create HADR endpoint
CREATE ENDPOINT [AG_endpoint]
STATE=STARTED
AS TCP (
    LISTENER_PORT = 5022,
    LISTENER_IP = ALL
)
FOR DATA_MIRRORING (
    ROLE = ALL,
    AUTHENTICATION = CERTIFICATE ag_certificate,
    ENCRYPTION = REQUIRED ALGORITHM AES
)
GRANT CONNECT ON ENDPOINT::AG_endpoint TO [ag_login];
GO
--add current node to the availability group
ALTER AVAILABILITY GROUP [K8sAG] JOIN WITH (CLUSTER_TYPE = NONE)
ALTER AVAILABILITY GROUP [K8sAG] GRANT CREATE ANY DATABASE
GO

secondary2 설정

USE [master]
GO
--Create login for AG
-- it should match the password from the primary script
CREATE LOGIN ag_login WITH PASSWORD = 'AGPa55w0rd';
CREATE USER ag_user FOR LOGIN ag_login;
-- create certificate
-- this time, create the certificate using the certificate file created in the primary node
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'AGPa55w0rd';
GO
-- Create the certificate using the certificate file created in the primary node
CREATE CERTIFICATE ag_certificate
    AUTHORIZATION ag_user
    FROM FILE = '/var/opt/mssql/ag_certificate.cert'
    WITH PRIVATE KEY (
    FILE = '/var/opt/mssql/ag_certificate.key',
    DECRYPTION BY PASSWORD = 'AGPa55w0rd'
)
GO
--create HADR endpoint
CREATE ENDPOINT [AG_endpoint]
STATE=STARTED
AS TCP (
    LISTENER_PORT = 5022,
    LISTENER_IP = ALL
)
FOR DATA_MIRRORING (
    ROLE = ALL,
    AUTHENTICATION = CERTIFICATE ag_certificate,
    ENCRYPTION = REQUIRED ALGORITHM AES
)
GRANT CONNECT ON ENDPOINT::AG_endpoint TO [ag_login];
GO
--add current node to the availability group
ALTER AVAILABILITY GROUP [K8sAG] JOIN WITH (CLUSTER_TYPE = NONE)
ALTER AVAILABILITY GROUP [K8sAG] GRANT CREATE ANY DATABASE
GO

준비 완료

확인 ssms

data input on primary

secondary1 에서 데이터가 잇는것을 확인을 하고난후 primary에서 데이터를 지워보자.

Delete FROM [DevTestAG].[dbo].[Customers]

data확인 on secondary1

select * from [DevTestAG].[dbo].[Customers];

지워진것을 확인할수 있다.

결론

longhorn이 3개의 리플리카를 가지고 있으므로 파드가 죽어도 다른곳에서 바로 올라와서 디비를 안전하게 관리할수 있다.

참고

1개의 primary에 8개의 secondary까지 만들수 있다 (엔터프라이즈에서만인가?)
8개중 sync는 맥스 3개까지 만들수 있다.

todo

디비를 하나만 햇는데 모든 디비가 생기자 마자 하려면 어덯게 해야할가?

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Last updated 1 year ago

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