#仅限于缓存用途，没有持久存储
apiVersion: apps/v1
kind: Deployment
metadata:
  name: memcached
  labels:
    app: memcached
spec:
  replicas: 1
  selector:
    matchLabels:
      app: memcached
  template:
    metadata:
      labels:
        name: memcached
        app: memcached
      annotations:
        #disable istio sidecar injection
        sidecar.istio.io/inject: "false"
    spec:
      securityContext:
        sysctls:
          #kubernetes >= v1.11 and kernel version >= 4.15 needed
          #- name: kernel.msgmax
          #  value: "65536"
          - name: net.ipv4.tcp_syncookies
            value: "0"
          - name: net.ipv4.ip_local_port_range
            value: "1024 65535"
          - name: net.core.somaxconn
            value: "65535"
          - name: net.ipv4.ip_unprivileged_port_start
            value: "0"
          - name: net.ipv4.tcp_tw_reuse
            value: "1"
          - name: net.ipv4.tcp_fin_timeout
            value: "30"
          - name: net.ipv4.tcp_keepalive_intvl
            value: "10"
          - name: net.ipv4.tcp_keepalive_probes
            value: "2"
          - name: net.ipv4.tcp_keepalive_time
            value: "120"
          - name: net.ipv4.tcp_ecn
            value: "1"
          - name: net.ipv4.tcp_max_syn_backlog
            value: "65536"
          - name: net.ipv4.tcp_rfc1337
            value: "1"
          - name: net.ipv4.tcp_slow_start_after_idle
            value: "0"
          - name: net.ipv4.tcp_fack
            value: "1"
          - name: net.ipv4.tcp_max_tw_buckets
            value: "262144"
          - name: net.ipv4.tcp_fastopen
            value: "3"
          - name: net.ipv4.icmp_ratelimit
            value: "100"
          - name: net.ipv4.tcp_abort_on_overflow
            value: "1"
          - name: net.ipv4.tcp_adv_win_scale
            value: "2"
          - name: net.ipv4.tcp_retries2
            value: "8"
          - name: net.ipv4.tcp_syn_retries
            value: "3"
          - name: net.ipv4.tcp_synack_retries
            value: "2"
          - name: net.unix.max_dgram_qlen
            value: "512"
          - name: net.ipv4.tcp_fwmark_accept
            value: "1"
          - name: net.ipv4.fwmark_reflect
            value: "1"
      containers:
      - name: memcached
        image: slpcat/memcached
        resources:
          # keep request = limit to keep this container in guaranteed class
          requests:
            cpu: 500m
            memory: 1Gi
          limits:
            cpu: 2000m
            memory: 2Gi
        ports:
          - name: memcached
            containerPort: 11211
      #volumeMounts:
      #- name: config-volume
      #  mountPath: /opt/memcached/bin
      #volumes:
      #  - name: config-volume
      #    configMap:
      #      name: runbroker.sh
