docker and etcdctl

docker

docker run \
  -d \
  --name etcd \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=/var/etcd:/etcd-data \
  quay.io/coreos/etcd:v3.3.13 \
  /usr/local/bin/etcd \
  --name my-etcd-1 \
  --data-dir /etcd-data \
  --listen-client-urls http://0.0.0.0:2379 \
  --advertise-client-urls http://0.0.0.0:2379 \
  --listen-peer-urls http://0.0.0.0:2380 \
  --initial-advertise-peer-urls http://0.0.0.0:2380 \
  --initial-cluster my-etcd-1=http://0.0.0.0:2380 \
  --initial-cluster-token my-etcd-token \
  --initial-cluster-state new \
  --auto-compaction-retention 1 \
  --auto-compaction-mode periodic

• docker exec -it 5eb349b758e8 sh

• export ETCDCTL_API=3

etcdctl

• etcdctl version

etcdctl version: 3.3.13
API version: 3.3

• etcdctl put aaa test

• etcdctl get aaa -w=json

{
    "count": 1,
    "header": {
        "cluster_id": 2492248437018899686,
        "member_id": 1993612125774691551,
        "raft_term": 2,
        "revision": 4
    },
    "kvs": [
        {
            "create_revision": 3,
            "key": "YWFh",
            "mod_revision": 4,
            "value": "dGVzdA==",
            "version": 2
        }
    ]
}

• etcdctl del aaa

• etcdctl put aaa bbbbbbb

• etcdctl get aaa -w=json

{
    "count": 1,
    "header": {
        "cluster_id": 2492248437018899686,
        "member_id": 1993612125774691551,
        "raft_term": 2,
        "revision": 6
    },
    "kvs": [
        {
            "create_revision": 6,
            "key": "YWFh",
            "mod_revision": 6,
            "value": "YmJiYmJiYg==",
            "version": 1
        }
    ]
}

• json输出时 key value 都经过了base64 encode

• watch

/ # etcdctl put aaa bbb
OK
/ # etcdctl put aaa ccc
OK

• 另一个终端

/ # export ETCDCTL_API=3
/ # etcdctl version
etcdctl version: 3.3.13
API version: 3.3
/ # etcdctl watch aaa
PUT
aaa
bbb
PUT
aaa
ccc

ref

• https://etcd.io/docs/v3.5/dev-guide/interacting_v3/
• https://juejin.cn/post/7218550671833710629
• https://zhuanlan.zhihu.com/p/271232304