部署K8S集群

地址：https://www.jianshu.com/p/51542b0b239b

# 所有节点安装nfs工具
yum install nfs-utils -y

# 准备一个共享目录
mkdir -pv /nfs_dir/{gitlab_etc_ver130806,gitlab_log_ver130806,gitlab_opt_ver130806,gitlab_postgresql_data_ver130806}

# 在mastaer01机器，将共享目录以读写权限暴露给`IP地址`网段中的所有主机
vim /etc/exports

more /etc/exports
/nfs_dir/gitlab_etc_ver130806  IP地址(rw,sync,no_root_squash,no_all_squash)
/nfs_dir/gitlab_log_ver130806  IP地址(rw,sync,no_root_squash,no_all_squash)
/nfs_dir/gitlab_opt_ver130806  IP地址(rw,sync,no_root_squash,no_all_squash)

# 有结果后，在重新启动下所有节点的nfs相关服务
systemctl enable rpcbind
systemctl enable nfs
systemctl restart rpcbind nfs

showmount -e ip地址

# 创建命令空间
kubectl create namespace gitlab-ver130806

# 要执行的yaml
kubectl -n gitlab-ver130806 apply -f 3postgres.yaml
kubectl -n gitlab-ver130806 apply -f 4redis.yaml
kubectl -n gitlab-ver130806 apply -f 5gitlab.yaml
kubectl -n gitlab-ver130806 apply -f 6gitlab-tls.yaml

以下是：CICD部署yaml文件

3postgresql.yaml

# pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-postgresql-data-ver130806
  labels:
    type: gitlab-postgresql-data-ver130806
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs
  nfs:
    path: /nfs_dir/gitlab_postgresql_data_ver130806
    server: 'NFS-ip地址'

# pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: gitlab-postgresql-data-ver130806-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  storageClassName: nfs
  selector:
    matchLabels:
      type: gitlab-postgresql-data-ver130806
---
apiVersion: v1
kind: Service
metadata:
  name: postgresql
  labels:
    app: gitlab
    tier: postgreSQL
spec:
  ports:
    - port: 5432
  selector:
    app: gitlab
    tier: postgreSQL

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgresql
  labels:
    app: gitlab
    tier: postgreSQL
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gitlab
      tier: postgreSQL
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: gitlab
        tier: postgreSQL
    spec:
      #nodeSelector:
      #  gee/disk: "500g"
      containers:
        - image: postgres:12.6-alpine
        #- image: harbor.test.com/library/postgres:12.6-alpine
          name: postgresql
          env:
            - name: POSTGRES_USER
              value: gitlab
            - name: POSTGRES_DB
              value: gitlabhq_production
            - name: POSTGRES_PASSWORD
              value: testuser
            - name: TZ
              value: Asia/Shanghai
          ports:
            - containerPort: 5432
              name: postgresql
          livenessProbe:
            exec:
              command:
              - sh
              - -c
              - exec pg_isready -U gitlab -h 127.0.0.1 -p 5432 -d gitlabhq_production
            initialDelaySeconds: 110
            timeoutSeconds: 5
            failureThreshold: 6
          readinessProbe:
            exec:
              command:
              - sh
              - -c
              - exec pg_isready -U gitlab -h 127.0.0.1 -p 5432 -d gitlabhq_production
            initialDelaySeconds: 20
            timeoutSeconds: 3
            periodSeconds: 5
#          resources:
#            requests:
#              cpu: 100m
#              memory: 512Mi
#            limits:
#              cpu: "1"
#              memory: 1Gi
          volumeMounts:
            - name: postgresql
              mountPath: /var/lib/postgresql/data
      volumes:
        - name: postgresql
          persistentVolumeClaim:
            claimName: gitlab-postgresql-data-ver130806-pvc

4redis.yaml

---
apiVersion: v1
kind: Service
metadata:
  name: redis
  labels:
    app: gitlab
    tier: backend
spec:
  ports:
    - port: 6379
      targetPort: 6379
  selector:
    app: gitlab
    tier: backend
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis
  labels:
    app: gitlab
    tier: backend
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gitlab
      tier: backend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: gitlab
        tier: backend
    spec:
      #nodeSelector:
      #  gee/disk: "500g"
      containers:
        - image: redis:6.2.0-alpine3.13
        #- image: harbor.test.com/library/redis:6.2.0-alpine3.13
          name: redis
          command:
            - "redis-server"
          args:
            - "--requirepass"
            - "testuseredis"
#          resources:
#            requests:
#              cpu: "1"
#              memory: 2Gi
#            limits:
#              cpu: "1"
#              memory: 2Gi
          ports:
            - containerPort: 6379
              name: redis
          livenessProbe:
            exec:
              command:
              - sh
              - -c
              - "redis-cli ping"
            initialDelaySeconds: 30
            periodSeconds: 10
            timeoutSeconds: 5
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            exec:
              command:
              - sh
              - -c
              - "redis-cli ping"
            initialDelaySeconds: 5
            periodSeconds: 10
            timeoutSeconds: 1
            successThreshold: 1
            failureThreshold: 3
      initContainers:
      - command:
        - /bin/sh
        - -c
        - |
          ulimit -n 65536
          mount -o remount rw /sys
          echo never > /sys/kernel/mm/transparent_hugepage/enabled
          mount -o remount rw /proc/sys
          echo 2000 > /proc/sys/net/core/somaxconn
          echo 1 > /proc/sys/vm/overcommit_memory
        image: registry.cn-beijing.aliyuncs.com/acs/busybox:v1.29.2
        imagePullPolicy: IfNotPresent
        name: init-redis
        resources: {}
        securityContext:
          privileged: true
          procMount: Default

定制一下镜像

sources.list

[root@k8s-master dockerfile]# cat sources.list
deb http://mirrors.aliyun.com/ubuntu/ xenial main
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb-src http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu xenial-security main
deb-src http://mirrors.aliyun.com/ubuntu xenial-security main
deb http://mirrors.aliyun.com/ubuntu xenial-security universe
deb-src http://mirrors.aliyun.com/ubuntu xenial-security universe

Dockerfile

[root@k8s-master dockerfile]# cat Dockerfile
FROM gitlab/gitlab-ce:13.8.6-ce.0

RUN rm /etc/apt/sources.list \
    && echo 'deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main' > /etc/apt/sources.list.d/pgdg.list \
    && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
COPY sources.list /etc/apt/sources.list

RUN apt-get update -yq && \
    apt-get install -y vim iproute2 net-tools iputils-ping curl wget software-properties-common unzip postgresql-client-12 && \
    rm -rf /var/cache/apt/archives/*

RUN ln -svf /usr/bin/pg_dump /opt/gitlab/embedded/bin/pg_dump

[root@k8s-master dockerfile]# docker build -t gitlab/gitlab-ce:13.8.6-ce.1 .

5gitlab.yaml

# pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-etc-ver130806
  labels:
    type: gitlab-etc-ver130806
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs
  nfs:
    path: /nfs_dir/gitlab_etc_ver130806
    server: 10.0.1.201

# pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: gitlab-etc-ver130806-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs
  selector:
    matchLabels:
      type: gitlab-etc-ver130806
# pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-log-ver130806
  labels:
    type: gitlab-log-ver130806
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs
  nfs:
    path: /nfs_dir/gitlab_log_ver130806
    server: 10.0.1.201

# pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: gitlab-log-ver130806-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs
  selector:
    matchLabels:
      type: gitlab-log-ver130806
      
# pv
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: gitlab-opt-ver130806
  labels:
    type: gitlab-opt-ver130806
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs
  nfs:
    path: /nfs_dir/gitlab_opt_ver130806
    server: 10.0.1.201

# pvc
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: gitlab-opt-ver130806-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs
  selector:
    matchLabels:
      type: gitlab-opt-ver130806
---
apiVersion: v1
kind: Service
metadata:
  name: gitlab
  labels:
    app: gitlab
    tier: frontend
spec:
  ports:
    - name: gitlab-ui
      port: 80
      protocol: TCP
      targetPort: 80
    - name: gitlab-ssh
      port: 22
      protocol: TCP
      targetPort: 22
  selector:
    app: gitlab
    tier: frontend
  type: NodePort
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: gitlab
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: gitlab-cb-ver130806
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
  - kind: ServiceAccount
    name: gitlab
    namespace: gitlab-ver130806
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: gitlab
  labels:
    app: gitlab
    tier: frontend
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gitlab
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: gitlab
        tier: frontend
    spec:
      serviceAccountName: gitlab
      containers:
        - image: harbor.test.com/library/gitlab-ce:13.8.6-ce.1
          name: gitlabtest
#          resources:
#            requests:
#              cpu: 400m
#              memory: 4Gi
#            limits:
#              cpu: "800m"
#              memory: 8Gi
          securityContext:
            privileged: true
          env:
            - name: TZ
              value: Asia/Shanghai
            - name: GITLAB_OMNIBUS_CONFIG
              value: |
                postgresql['enable'] = false
                gitlab_rails['db_username'] = "gitlab"
                gitlab_rails['db_password'] = "testuser"
                gitlab_rails['db_host'] = "postgresql"
                gitlab_rails['db_port'] = "5432"
                gitlab_rails['db_database'] = "gitlabhq_production"
                gitlab_rails['db_adapter'] = 'postgresql'
                gitlab_rails['db_encoding'] = 'utf8'
                redis['enable'] = false
                gitlab_rails['redis_host'] = 'redis'
                gitlab_rails['redis_port'] = '6379'
                gitlab_rails['redis_password'] = 'testuseredis'
                gitlab_rails['gitlab_shell_ssh_port'] = 22
                external_url 'http://git.test.com/'
                nginx['listen_port'] = 80
                nginx['listen_https'] = false
                #-------------------------------------------
                gitlab_rails['gitlab_email_enabled'] = true
                gitlab_rails['gitlab_email_from'] = 'admin@test.com'
                gitlab_rails['gitlab_email_display_name'] = 'test'
                gitlab_rails['gitlab_email_reply_to'] = 'gitlab@test.com'
                gitlab_rails['gitlab_default_can_create_group'] = true
                gitlab_rails['gitlab_username_changing_enabled'] = true
                gitlab_rails['smtp_enable'] = true
                gitlab_rails['smtp_address'] = "smtp.exmail.qq.com"
                gitlab_rails['smtp_port'] = 465
                gitlab_rails['smtp_user_name'] = "gitlab@test.com"
                gitlab_rails['smtp_password'] = "testsendmail"
                gitlab_rails['smtp_domain'] = "exmail.qq.com"
                gitlab_rails['smtp_authentication'] = "login"
                gitlab_rails['smtp_enable_starttls_auto'] = true
                gitlab_rails['smtp_tls'] = true
                #-------------------------------------------
                # 关闭 promethues
                prometheus['enable'] = false
                # 关闭 grafana
                grafana['enable'] = false
                # 减少内存占用
                unicorn['worker_memory_limit_min'] = "200 * 1 << 20"
                unicorn['worker_memory_limit_max'] = "300 * 1 << 20"
                # 减少 sidekiq 的并发数
                sidekiq['concurrency'] = 16
                # 减少 postgresql 数据库缓存
                postgresql['shared_buffers'] = "256MB"
                # 减少 postgresql 数据库并发数量
                postgresql['max_connections'] = 8
                # 减少进程数   worker=CPU核数+1
                unicorn['worker_processes'] = 2
                nginx['worker_processes'] = 2
                puma['worker_processes'] = 2
                # puma['per_worker_max_memory_mb'] = 850
                # 保留3天备份的数据文件
                gitlab_rails['backup_keep_time'] = 259200
                #-------------------------------------------
          ports:
            - containerPort: 80
              name: gitlab
          livenessProbe:
            exec:
              command:
              - sh
              - -c
              - "curl -s http://127.0.0.1/-/health|grep -w 'GitLab OK'"
            initialDelaySeconds: 120
            periodSeconds: 10
            timeoutSeconds: 5
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            exec:
              command:
              - sh
              - -c
              - "curl -s http://127.0.0.1/-/health|grep -w 'GitLab OK'"
            initialDelaySeconds: 120
            periodSeconds: 10
            timeoutSeconds: 5
            successThreshold: 1
            failureThreshold: 3
          volumeMounts:
            - mountPath: /etc/gitlab
              name: gitlab1
            - mountPath: /var/log/gitlab
              name: gitlab2
            - mountPath: /var/opt/gitlab
              name: gitlab3
            - mountPath: /etc/localtime
              name: tz-config

      volumes:
        - name: gitlab1
          persistentVolumeClaim:
            claimName: gitlab-etc-ver130806-pvc
        - name: gitlab2
          persistentVolumeClaim:
            claimName: gitlab-log-ver130806-pvc
        - name: gitlab3
          persistentVolumeClaim:
            claimName: gitlab-opt-ver130806-pvc
        - name: tz-config
          hostPath:
            path: /usr/share/zoneinfo/Asia/Shanghai

      securityContext:
        runAsUser: 0
        fsGroup: 0

开始部署

kubectl -n gitlab-ver130806 exec -it $(kubectl -n gitlab-ver130806 get pod|grep -v runner|grep gitlab|awk '{print $1}') -- gitlab-rake gitlab:backup:restore BACKUP=1602889879_2020_10_17_12.9.2

kubectl -n gitlab-ver130806 exec -it $(kubectl -n gitlab-ver130806 get pod|grep -v runner|grep gitlab|awk '{print $1}') -- gitlab-ctl reconfigure

kubectl -n gitlab-ver130806 exec -it $(kubectl -n gitlab-ver130806 get pod|grep -v runner|grep gitlab|awk '{print $1}') -- gitlab-ctl status

6gitlab-tls.yaml

# old version

#apiVersion: extensions/v1beta1
#kind: Ingress
#metadata:
#  name: gitlab
#  annotations:
#    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
#    nginx.ingress.kubernetes.io/proxy-body-size: "20m"
#spec:
#  tls:
#  - hosts:
#    - git.test.com
#    secretName: mytls
#  rules:
#  - host: git.test.com
#    http:
#      paths:
#      - path: /
#        backend:
#          serviceName: gitlab
#          servicePort: 80

# Add tls
# openssl genrsa -out tls.key 2048
# openssl req -new -x509 -key tls.key -out tls.cert -days 360 -subj /CN=*.test.com
# kubectl -n gitlab-ver130806 create secret tls mytls --cert=tls.cert --key=tls.key 

# new version

## https://kubernetes.io/docs/concepts/services-networking/ingress/
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: gitlab
  annotations:
    nginx.ingress.kubernetes.io/force-ssl-redirect: "false"
    nginx.ingress.kubernetes.io/proxy-body-size: "20m"
spec:
  tls:
  - hosts:
    - git.test.com
    secretName: mytls
  rules:
  - host: git.test.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: gitlab
            port:
              number: 80
---