etcd使用

下载：

https://github.com/etcd-io/etcd/releases/tag/v3.3.13

tar -zxvf   etcd-v3.3.13-linux-amd64.tar.gz

启动：

./etcd --listen-client-urls 'http://0.0.0.0:2379' --advertise-client-urls 'http://0.0.0.0:2379'

[root@localhost etcd-v3.3.13-linux-amd64]# ./etcd --listen-client-urls 'http://0.0.0.0:2379' --advertise-client-urls 'htt p://0.0.0.0:2379'
-- ::40.261923 I | etcdmain: etcd Version: 3.3.
-- ::40.262093 I | etcdmain: Git SHA: 98d3084
-- ::40.262107 I | etcdmain: Go Version: go1.10.8
-- ::40.262128 I | etcdmain: Go OS/Arch: linux/amd64
-- ::40.262144 I | etcdmain: setting maximum number of CPUs to , total number of available CPUs is
-- ::40.262176 W | etcdmain: no data-dir provided, using default data-dir ./default.etcd
-- ::40.263503 I | embed: listening for peers on http://localhost:2380
-- ::40.264070 I | embed: listening for client requests on 0.0.0.0:
-- ::40.273565 I | etcdserver: name = default
-- ::40.273598 I | etcdserver: data dir = default.etcd
-- ::40.273607 I | etcdserver: member dir = default.etcd/member
-- ::40.273613 I | etcdserver: heartbeat = 100ms
-- ::40.273618 I | etcdserver: election = 1000ms
-- ::40.273624 I | etcdserver: snapshot count =
-- ::40.273638 I | etcdserver: advertise client URLs = http://0.0.0.0:2379
-- ::40.273646 I | etcdserver: initial advertise peer URLs = http://localhost:2380
-- ::40.273657 I | etcdserver: initial cluster = default=http://localhost:2380
-- ::40.276843 I | etcdserver: starting member 8e9e05c52164694d in cluster cdf818194e3a8c32
-- ::40.276890 I | raft: 8e9e05c52164694d became follower at term
-- ::40.276911 I | raft: newRaft 8e9e05c52164694d [peers: [], term: , commit: , applied: , lastindex: , lastterm: ]
-- ::40.276919 I | raft: 8e9e05c52164694d became follower at term
-- ::40.281968 W | auth: simple token is not cryptographically signed
-- ::40.287898 I | etcdserver: starting server... [version: 3.3., cluster version: to_be_decided]
-- ::40.292469 I | etcdserver: 8e9e05c52164694d as single-node; fast-forwarding  ticks (election ticks )
-- ::40.293629 I | etcdserver/membership: added member 8e9e05c52164694d [http://localhost:2380] to cluster cdf818194e3a8c32
-- ::40.378709 I | raft: 8e9e05c52164694d is starting a new election at term
-- ::40.378779 I | raft: 8e9e05c52164694d became candidate at term
-- ::40.378823 I | raft: 8e9e05c52164694d received MsgVoteResp from 8e9e05c52164694d at term
-- ::40.378855 I | raft: 8e9e05c52164694d became leader at term
-- ::40.378876 I | raft: raft.node: 8e9e05c52164694d elected leader 8e9e05c52164694d at term
-- ::40.399670 I | etcdserver: published {Name:default ClientURLs:[http://0.0.0.0:2379]} to cluster cdf818194e3a8c32
-- ::40.401716 E | etcdmain: forgot to set Type=notify in systemd service file?
-- ::40.401893 I | etcdserver: setting up the initial cluster version to 3.3
-- ::40.403708 N | etcdserver/membership: set the initial cluster version to 3.3
-- ::40.403871 I | etcdserver/api: enabled capabilities for version 3.3
-- ::40.403922 I | embed: ready to serve client requests
-- ::40.406114 N | embed: serving insecure client requests on [::]:, this is strongly discouraged!

nohup ./etcd --listen-client-urls 'http://0.0.0.0:2379' --advertise-client-urls 'http://0.0.0.0:2379' &

[root@localhost etcd-v3.3.13-linux-amd64]# ./etcdctl

[root@localhost etcd-v3.3.13-linux-amd64]# ./etcdctl
NAME:
   etcdctl - A simple command line client for etcd.

WARNING:
   Environment variable ETCDCTL_API is not set; defaults to etcdctl v2.
   Set environment variable ETCDCTL_API= to use v3 API or ETCDCTL_API= to use v2 API.

USAGE:
   etcdctl [global options] command [command options] [arguments...]

VERSION:
   3.3.

COMMANDS:
     backup          backup an etcd directory
     cluster-health  check the health of the etcd cluster
     mk              make a new key with a given value
     mkdir           make a new directory
     rm              remove a key or a directory
     rmdir           removes the key if it is an empty directory or a key-value pair
     get             retrieve the value of a key
     ls              retrieve a directory
     set             set the value of a key
     setdir          create a new directory or update an existing directory TTL
     update          update an existing key with a given value
     updatedir       update an existing directory
     watch           watch a key for changes
     exec-watch      watch a key for changes and exec an executable
     member          member add, remove and list subcommands
     user            user add, grant and revoke subcommands
     role            role add, grant and revoke subcommands
     auth            overall auth controls
     help, h         Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --debug                          output cURL commands which can be used to reproduce the request
   --no-sync                        don't synchronize cluster information before sending request
   --output simple, -o simple       output response in the given format (simple, `extended` or `json`) (default: "simple")
   --discovery-srv value, -D value  domain name to query for SRV records describing cluster endpoints
   --insecure-discovery             accept insecure SRV records describing cluster endpoints
   --peers value, -C value          DEPRECATED - "--endpoints" should be used instead
   --endpoint value                 DEPRECATED - "--endpoints" should be used instead
   --endpoints value                a comma-delimited list of machine addresses in the cluster (default: 

"http://127.0.0.1:2379,http://127.0.0.1:4001")
   --cert-file value                identify HTTPS client using this SSL certificate file
   --key-file value                 identify HTTPS client using this SSL key file
   --ca-file value                  verify certificates of HTTPS-enabled servers using this CA bundle
   --username value, -u value       provide username[:password] and prompt if password is not supplied.
   --timeout value                  connection timeout per request (default: 2s)
   --total-timeout value            timeout for the command execution (except watch) (default: 5s)
   --help, -h                       show help
   --version, -v                    print the version

ETCDCTL_API=3

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl
NAME:
        etcdctl - A simple command line client for etcd3.

USAGE:
        etcdctl

VERSION:
        3.3.

API VERSION:
        3.3

COMMANDS:
        get                     Gets the key or a range of keys
        put                     Puts the given key into the store
        del                     Removes the specified key or range of keys [key, range_end)
        txn                     Txn processes all the requests in one transaction
        compaction              Compacts the event history in etcd
        alarm disarm            Disarms all alarms
        alarm list              Lists all alarms
        defrag                  Defragments the storage of the etcd members with given endpoints
        endpoint health         Checks the healthiness of endpoints specified in `--endpoints` flag
        endpoint status         Prints out the status of endpoints specified in `--endpoints` flag
        endpoint hashkv         Prints the KV history hash for each endpoint in --endpoints
        move-leader             Transfers leadership to another etcd cluster member.
        watch                   Watches events stream on keys or prefixes
        version                 Prints the version of etcdctl
        lease grant             Creates leases
        lease revoke            Revokes leases
        lease timetolive        Get lease information
        lease list              List all active leases
        lease keep-alive        Keeps leases alive (renew)
        member add              Adds a member into the cluster
        member remove           Removes a member from the cluster
        member update           Updates a member in the cluster
        member list             Lists all members in the cluster
        snapshot save           Stores an etcd node backend snapshot to a given file
        snapshot restore        Restores an etcd member snapshot to an etcd directory
        snapshot status         Gets backend snapshot status of a given file
        make-mirror             Makes a mirror at the destination etcd cluster
        migrate                 Migrates keys in a v2 store to a mvcc store
        lock                    Acquires a named lock
        elect                   Observes and participates in leader election
        auth enable             Enables authentication
        auth disable            Disables authentication
        user add                Adds a new user
        user delete             Deletes a user
        user get                Gets detailed information of a user
        user list               Lists all users
        user passwd             Changes password of user
        user grant-role         Grants a role to a user
        user revoke-role        Revokes a role from a user
        role add                Adds a new role
        role delete             Deletes a role
        role get                Gets detailed information of a role
        role list               Lists all roles
        role grant-permission   Grants a key to a role
        role revoke-permission  Revokes a key from a role
        check perf              Check the performance of the etcd cluster
        help                    Help about any command

OPTIONS:
      --cacert=""                               verify certificates of TLS-enabled secure servers using this CA bundle
      --cert=""                                 identify secure client using this TLS certificate file
      --command-timeout=5s                      timeout for short running command (excluding dial timeout)
      --debug[=false]                           enable client-side debug logging
      --dial-timeout=2s                         dial timeout for client connections
  -d, --discovery-srv=""                        domain name to query for SRV records describing cluster endpoints
      --endpoints=[127.0.0.1:]              gRPC endpoints
  -h, --help[=false]                            help for etcdctl
      --hex[=false]                             print byte strings as hex encoded strings
      --insecure-discovery[=true]               accept insecure SRV records describing cluster endpoints
      --insecure-skip-tls-verify[=false]        skip server certificate verification
      --insecure-transport[=true]               disable transport security for client connections
      --keepalive-time=2s                       keepalive time for client connections
      --keepalive-timeout=6s                    keepalive timeout for client connections
      --key=""                                  identify secure client using this TLS key file
      --user=""                                 username[:password] for authentication (prompt if password is not supplied)
  -w, --write-out="simple"                      set the output format (fields, json, protobuf, simple, table)

get put简单操作

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  put "name" "sunlong"
OK
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  delete "name" "sunlong"
Error: unknown command "delete" for "etcdctl"
Run 'etcdctl --help' for usage.
Error: unknown command "delete" for "etcdctl"
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  del "name" "sunlong"

[root@localhost etcd-v3.3.13-linux-amd64]#

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  get "name"
name
sunlong
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  get "name"
name
sunlong
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  get "name"

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API=3 ./etcdctl  get -h

NAME:
        get - Gets the key or a range of keys

USAGE:
        etcdctl get [options] <key> [range_end]

OPTIONS:
      --consistency="l"                 Linearizable(l) or Serializable(s)
      --from-key[=false]                Get keys that are greater than or equal to the given key using byte compare
      --keys-only[=false]               Get only the keys
      --limit=                         Maximum number of results
      --order=""                        Order of results; ASCEND or DESCEND (ASCEND by default)
      --prefix[=false]                  Get keys with matching prefix
      --print-value-only[=false]        Only write values when using the "simple" output format
      --rev=                           Specify the kv revision
      --sort-by=""                      Sort target; CREATE, KEY, MODIFY, VALUE, or VERSION

GLOBAL OPTIONS:
      --cacert=""                               verify certificates of TLS-enabled secure servers using this CA bundle
      --cert=""                                 identify secure client using this TLS certificate file
      --command-timeout=5s                      timeout for short running command (excluding dial timeout)
      --debug[=false]                           enable client-side debug logging
      --dial-timeout=2s                         dial timeout for client connections
  -d, --discovery-srv=""                        domain name to query for SRV records describing cluster endpoints
      --endpoints=[127.0.0.1:]              gRPC endpoints
      --hex[=false]                             print byte strings as hex encoded strings
      --insecure-discovery[=true]               accept insecure SRV records describing cluster endpoints
      --insecure-skip-tls-verify[=false]        skip server certificate verification
      --insecure-transport[=true]               disable transport security for client connections
      --keepalive-time=2s                       keepalive time for client connections
      --keepalive-timeout=6s                    keepalive timeout for client connections
      --key=""                                  identify secure client using this TLS key file
      --user=""                                 username[:password] for authentication (prompt if password is not supplied)
  -w, --write-out="simple"                      set the output format (fields, json, protobuf, simple, table)

[root@localhost etcd-v3.3.13-linux-amd64]#

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  put "/cron/jobs/job1"  "{...job1}"
OK
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  put "/cron/jobs/job2"  "{...job2}"
OK

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  get "/cron/jobs/" --prefix
/cron/jobs/job1
{...job1}
/cron/jobs/job2
{...job2}

  ETCDCTL_API=3 ./etcdctl  watch "/cron/jobs/" --prefix

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  put "/cron/jobs/job2"  "{...job2...111}"
OK
[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  del "/cron/jobs/job2"

[root@localhost etcd-v3.3.13-linux-amd64]# ETCDCTL_API= ./etcdctl  watch "/cron/jobs/" --prefix
PUT
/cron/jobs/job2
{...job2...}
DELETE
/cron/jobs/job2