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[root@etcd-node1 ~]# cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)
[root@etcd-node1 ~]# hostname -I
192.168.56.121 10.0.3.15
[root@etcd-node1 ~]#

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[root@etcd-node1 ~]# tar -zxvf etcd-v3.5.18-linux-amd64.tar.gz
etcd-v3.5.18-linux-amd64/
etcd-v3.5.18-linux-amd64/etcd
etcd-v3.5.18-linux-amd64/etcdctl
etcd-v3.5.18-linux-amd64/etcdutl
etcd-v3.5.18-linux-amd64/README.md
etcd-v3.5.18-linux-amd64/README-etcdctl.md
etcd-v3.5.18-linux-amd64/READMEv2-etcdctl.md
etcd-v3.5.18-linux-amd64/README-etcdutl.md
etcd-v3.5.18-linux-amd64/Documentation/
etcd-v3.5.18-linux-amd64/Documentation/README.md
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/apispec/
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/apispec/swagger/
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/apispec/swagger/rpc.swagger.json
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/apispec/swagger/v3election.swagger.json
etcd-v3.5.18-linux-amd64/Documentation/dev-guide/apispec/swagger/v3lock.swagger.json
[root@etcd-node1 ~]# 
## 修改解压后文件夹权限
[root@etcd-node1 ~]# chown root.  -R etcd-v3.5.18-linux-amd64
[root@etcd-node1 ~]# ll etcd-v3.5.18-linux-amd64
total 55208
drwxr-xr-x 3 root root       40 Jan 25 03:15 Documentation
-rwxr-xr-x 1 root root 23642264 Jan 25 03:15 etcd
-rwxr-xr-x 1 root root 17903768 Jan 25 03:15 etcdctl
-rwxr-xr-x 1 root root 14901400 Jan 25 03:15 etcdutl
-rw-r--r-- 1 root root    42066 Jan 25 03:15 README-etcdctl.md
-rw-r--r-- 1 root root     7359 Jan 25 03:15 README-etcdutl.md
-rw-r--r-- 1 root root     9210 Jan 25 03:15 README.md
-rw-r--r-- 1 root root     7896 Jan 25 03:15 READMEv2-etcdctl.md
[root@etcd-node1 ~]# 

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[root@etcd-node1 ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

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[root@etcd-node1 ~]# cp -p etcd-v3.5.18-linux-amd64/etcd* /usr/local/bin/
[root@etcd-node1 ~]# ll /usr/local/bin/etcd*
-rwxr-xr-x 1 root root 23642264 Jan 25 03:15 /usr/local/bin/etcd
-rwxr-xr-x 1 root root 17903768 Jan 25 03:15 /usr/local/bin/etcdctl
-rwxr-xr-x 1 root root 14901400 Jan 25 03:15 /usr/local/bin/etcdutl

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[root@etcd-node1 ~]# etcd --version
etcd Version: 3.5.18
Git SHA: 5bca08e
Go Version: go1.22.11
Go OS/Arch: linux/amd64
[root@etcd-node1 ~]# etcdctl version
etcdctl version: 3.5.18
API version: 3.5
[root@etcd-node1 ~]# etcdutl version
etcdutl version: 3.5.18
API version: 3.5

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[root@etcd-node1 ~]# etcd --help
Usage:

  etcd [flags]
    Start an etcd server.

  etcd --version
    Show the version of etcd.

  etcd -h | --help
    Show the help information about etcd.

  etcd --config-file
    Path to the server configuration file. Note that if a configuration file is provided, other command line flags and environment variables will be ignored.

  etcd gateway
    Run the stateless pass-through etcd TCP connection forwarding proxy.

  etcd grpc-proxy
    Run the stateless etcd v3 gRPC L7 reverse proxy.


Member:
  --name 'default'
    Human-readable name for this member.
  --data-dir '${name}.etcd'
    Path to the data directory.
  --wal-dir ''
    Path to the dedicated wal directory.
  --snapshot-count '100000'
    Number of committed transactions to trigger a snapshot to disk.
  --heartbeat-interval '100'
    Time (in milliseconds) of a heartbeat interval.
  --election-timeout '1000'
    Time (in milliseconds) for an election to timeout. See tuning documentation for details.
  --initial-election-tick-advance 'true'
    Whether to fast-forward initial election ticks on boot for faster election.
  --listen-peer-urls 'http://localhost:2380'
    List of URLs to listen on for peer traffic.
  --listen-client-urls 'http://localhost:2379'
    List of URLs to listen on for client grpc traffic and http as long as --listen-client-http-urls is not specified.
  --listen-client-http-urls ''
    List of URLs to listen on for http only client traffic. Enabling this flag removes http services from --listen-client-urls.
  --max-snapshots '5'
    Maximum number of snapshot files to retain (0 is unlimited).
  --max-wals '5'
    Maximum number of wal files to retain (0 is unlimited).
  --quota-backend-bytes '0'
    Raise alarms when backend size exceeds the given quota (0 defaults to low space quota).
  --backend-bbolt-freelist-type 'map'
    BackendFreelistType specifies the type of freelist that boltdb backend uses(array and map are supported types).
  --backend-batch-interval ''
    BackendBatchInterval is the maximum time before commit the backend transaction.
  --backend-batch-limit '0'
    BackendBatchLimit is the maximum operations before commit the backend transaction.
  --max-txn-ops '128'
    Maximum number of operations permitted in a transaction.
  --max-request-bytes '1572864'
    Maximum client request size in bytes the server will accept.
  --max-concurrent-streams 'math.MaxUint32'
    Maximum concurrent streams that each client can open at a time.
  --enable-grpc-gateway
    Enable GRPC gateway.
  --grpc-keepalive-min-time '5s'
    Minimum duration interval that a client should wait before pinging server.
  --grpc-keepalive-interval '2h'
    Frequency duration of server-to-client ping to check if a connection is alive (0 to disable).
  --grpc-keepalive-timeout '20s'
    Additional duration of wait before closing a non-responsive connection (0 to disable).
  --socket-reuse-port 'false'
    Enable to set socket option SO_REUSEPORT on listeners allowing rebinding of a port already in use.
  --socket-reuse-address 'false'
    Enable to set socket option SO_REUSEADDR on listeners allowing binding to an address in TIME_WAIT state.
  --raft-read-timeout '5s'
    Read timeout set on each rafthttp connection
  --raft-write-timeout '5s'
    Write timeout set on each rafthttp connection

Clustering:
  --initial-advertise-peer-urls 'http://localhost:2380'
    List of this member's peer URLs to advertise to the rest of the cluster.
  --initial-cluster 'default=http://localhost:2380'
    Initial cluster configuration for bootstrapping.
  --initial-cluster-state 'new'
    Initial cluster state ('new' when bootstrapping a new cluster or 'existing' when adding new members to an existing cluster).
    After successful initialization (bootstrapping or adding), flag is ignored on restarts.
  --initial-cluster-token 'etcd-cluster'
    Initial cluster token for the etcd cluster during bootstrap.
    Specifying this can protect you from unintended cross-cluster interaction when running multiple clusters.
  --advertise-client-urls 'http://localhost:2379'
    List of this member's client URLs to advertise to the public.
    The client URLs advertised should be accessible to machines that talk to etcd cluster. etcd client libraries parse these URLs to connect to the cluster.
  --discovery ''
    Discovery URL used to bootstrap the cluster.
  --discovery-fallback 'proxy'
    Expected behavior ('exit' or 'proxy') when discovery services fails.
    "proxy" supports v2 API only.
  --discovery-proxy ''
    HTTP proxy to use for traffic to discovery service.
  --discovery-srv ''
    DNS srv domain used to bootstrap the cluster.
  --discovery-srv-name ''
    Suffix to the dns srv name queried when bootstrapping.
  --strict-reconfig-check 'true'
    Reject reconfiguration requests that would cause quorum loss.
  --pre-vote 'true'
    Enable to run an additional Raft election phase.
  --auto-compaction-retention '0'
    Auto compaction retention length. 0 means disable auto compaction.
  --auto-compaction-mode 'periodic'
    Interpret 'auto-compaction-retention' one of: periodic|revision. 'periodic' for duration based retention, defaulting to hours if no time unit is provided (e.g. '5m'). 'revision' for revision number based retention.
  --enable-v2 'false'
    Accept etcd V2 client requests. Deprecated and to be decommissioned in v3.6.
  --v2-deprecation 'not-yet'
    Phase of v2store deprecation. Allows to opt-in for higher compatibility mode.
    Supported values:
      'not-yet'                // Issues a warning if v2store have meaningful content (default in v3.5)
      'write-only'             // Custom v2 state is not allowed (planned default in v3.6)
      'write-only-drop-data'   // Custom v2 state will get DELETED !
      'gone'                   // v2store is not maintained any longer. (planned default in v3.7)

Security:
  --cert-file ''
    Path to the client server TLS cert file.
  --key-file ''
    Path to the client server TLS key file.
  --client-cert-auth 'false'
    Enable client cert authentication.
  --client-cert-file ''
    Path to an explicit peer client TLS cert file otherwise cert file will be used when client auth is required.
  --client-key-file ''
    Path to an explicit peer client TLS key file otherwise key file will be used when client auth is required.
  --client-crl-file ''
    Path to the client certificate revocation list file.
  --client-cert-allowed-hostname ''
    Comma-separated list of SAN hostnames for client cert authentication.
  --trusted-ca-file ''
    Path to the client server TLS trusted CA cert file.
  --auto-tls 'false'
    Client TLS using generated certificates.
  --peer-cert-file ''
    Path to the peer server TLS cert file.
  --peer-key-file ''
    Path to the peer server TLS key file.
  --peer-client-cert-auth 'false'
    Enable peer client cert authentication.
  --peer-trusted-ca-file ''
    Path to the peer server TLS trusted CA file.
  --peer-cert-allowed-cn ''
    Comma-separated list of allowed CNs for inter-peer TLS authentication.
  --peer-cert-allowed-hostname ''
    Comma-separated list of allowed SAN hostnames for inter-peer TLS authentication.
  --peer-auto-tls 'false'
    Peer TLS using self-generated certificates if --peer-key-file and --peer-cert-file are not provided.
  --peer-client-cert-file ''
    Path to an explicit peer client TLS cert file otherwise peer cert file will be used when client auth is required.
  --peer-client-key-file ''
    Path to an explicit peer client TLS key file otherwise peer key file will be used when client auth is required.
  --self-signed-cert-validity '1'
    The validity period of the client and peer certificates that are automatically generated by etcd when you specify ClientAutoTLS and PeerAutoTLS, the unit is year, and the default is 1.
  --peer-crl-file ''
    Path to the peer certificate revocation list file.
  --cipher-suites ''
    Comma-separated list of supported TLS cipher suites between client/server and peers (empty will be auto-populated by Go).
  --cors '*'
    Comma-separated whitelist of origins for CORS, or cross-origin resource sharing, (empty or * means allow all).
  --host-whitelist '*'
    Acceptable hostnames from HTTP client requests, if server is not secure (empty or * means allow all).
  --tls-min-version 'TLS1.2'
    Minimum TLS version supported by etcd. Possible values: TLS1.2, TLS1.3.
  --tls-max-version ''
    Maximum TLS version supported by etcd. Possible values: TLS1.2, TLS1.3 (empty will be auto-populated by Go).

Auth:
  --auth-token 'simple'
    Specify a v3 authentication token type and its options ('simple' or 'jwt').
  --bcrypt-cost 10
    Specify the cost / strength of the bcrypt algorithm for hashing auth passwords. Valid values are between 4 and 31.
  --auth-token-ttl 300
    Time (in seconds) of the auth-token-ttl.

Profiling and Monitoring:
  --enable-pprof 'false'
    Enable runtime profiling data via HTTP server. Address is at client URL + "/debug/pprof/"
  --metrics 'basic'
    Set level of detail for exported metrics, specify 'extensive' to include server side grpc histogram metrics.
  --listen-metrics-urls ''
    List of URLs to listen on for the /metrics and /health endpoints. For https, the client URL TLS info is used.

Logging:
  --logger 'zap'
    Currently only supports 'zap' for structured logging.
  --log-outputs 'default'
    Specify 'stdout' or 'stderr' to skip journald logging even when running under systemd, or list of comma separated output targets.
  --log-level 'info'
    Configures log level. Only supports debug, info, warn, error, panic, or fatal.
  --enable-log-rotation 'false'
    Enable log rotation of a single log-outputs file target.
  --log-rotation-config-json '{"maxsize": 100, "maxage": 0, "maxbackups": 0, "localtime": false, "compress": false}'
    Configures log rotation if enabled with a JSON logger config. MaxSize(MB), MaxAge(days,0=no limit), MaxBackups(0=no limit), LocalTime(use computers local time), Compress(gzip)".

Experimental distributed tracing:
  --experimental-enable-distributed-tracing 'false'
    Enable experimental distributed tracing.
  --experimental-distributed-tracing-address 'localhost:4317'
    Distributed tracing collector address.
  --experimental-distributed-tracing-service-name 'etcd'
    Distributed tracing service name, must be same across all etcd instances.
  --experimental-distributed-tracing-instance-id ''
    Distributed tracing instance ID, must be unique per each etcd instance.
  --experimental-distributed-tracing-sampling-rate '0'
    Number of samples to collect per million spans for distributed tracing. Disabled by default.

v2 Proxy (Deprecated and to be decommissioned in v3.6):
  --proxy 'off'
    Proxy mode setting ('off', 'readonly' or 'on').
  --proxy-failure-wait 5000
    Time (in milliseconds) an endpoint will be held in a failed state.
  --proxy-refresh-interval 30000
    Time (in milliseconds) of the endpoints refresh interval.
  --proxy-dial-timeout 1000
    Time (in milliseconds) for a dial to timeout.
  --proxy-write-timeout 5000
    Time (in milliseconds) for a write to timeout.
  --proxy-read-timeout 0
    Time (in milliseconds) for a read to timeout.

Experimental feature:
  --experimental-initial-corrupt-check 'false'
    Enable to check data corruption before serving any client/peer traffic.
  --experimental-corrupt-check-time '0s'
    Duration of time between cluster corruption check passes.
  --experimental-compact-hash-check-enabled 'false'
    Enable leader to periodically check followers compaction hashes.
  --experimental-compact-hash-check-time '1m'
    Duration of time between leader checks followers compaction hashes.
  --experimental-enable-v2v3 ''
    Serve v2 requests through the v3 backend under a given prefix. Deprecated and to be decommissioned in v3.6.
  --experimental-enable-lease-checkpoint 'false'
    ExperimentalEnableLeaseCheckpoint enables primary lessor to persist lease remainingTTL to prevent indefinite auto-renewal of long lived leases.
  --experimental-enable-lease-checkpoint-persist 'false'
    Enable persisting remainingTTL to prevent indefinite auto-renewal of long lived leases. Always enabled in v3.6. Should be used to ensure smooth upgrade from v3.5 clusters with this feature enabled. Requires experimental-enable-lease-checkpoint to be enabled.
  --experimental-compaction-batch-limit 1000
    ExperimentalCompactionBatchLimit sets the maximum revisions deleted in each compaction batch.
  --experimental-compaction-sleep-interval '10ms'
    ExperimentalCompactionSleepInterval sets the sleep interval between each compaction batch.
  --experimental-peer-skip-client-san-verification 'false'
    Skip verification of SAN field in client certificate for peer connections.
  --experimental-watch-progress-notify-interval '10m'
    Duration of periodical watch progress notification.
  --experimental-downgrade-check-time
    Duration of time between two downgrade status checks.
  --experimental-memory-mlock
    Enable to enforce etcd pages (in particular bbolt) to stay in RAM.
  --experimental-warning-apply-duration '100ms'
        Warning is generated if requests take more than this duration.
  --experimental-txn-mode-write-with-shared-buffer 'true'
    Enable the write transaction to use a shared buffer in its readonly check operations.
  --experimental-bootstrap-defrag-threshold-megabytes
    Enable the defrag during etcd server bootstrap on condition that it will free at least the provided threshold of disk space. Needs to be set to non-zero value to take effect.
  --experimental-stop-grpc-service-on-defrag
    Enable etcd gRPC service to stop serving client requests on defragmentation.

Unsafe feature:
  --force-new-cluster 'false'
    Force to create a new one-member cluster.
  --unsafe-no-fsync 'false'
    Disables fsync, unsafe, will cause data loss.

CAUTIOUS with unsafe flag! It may break the guarantees given by the consensus protocol!

[root@etcd-node1 ~]#

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[root@etcd-node1 ~]# etcdctl --help
NAME:
        etcdctl - A simple command line client for etcd3.

USAGE:
        etcdctl [flags]

VERSION:
        3.5.18

API VERSION:
        3.5


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

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
      --discovery-srv-name=""                   service name to query when using DNS discovery
      --endpoints=[127.0.0.1:2379]              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 (CAUTION: this option should be enabled only for testing purposes)
      --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
      --password=""                             password for authentication (if this option is used, --user option shouldn't include password)
      --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@etcd-node1 ~]#

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[root@etcd-node1 ~]# etcdutl --help
Usage:
  etcdutl [command]

Available Commands:
  backup      [legacy] offline backup of etcd directory
  check       commands for checking properties
  defrag      Defragments the storage of the etcd
  help        Help about any command
  snapshot    Manages etcd node snapshots
  version     Prints the version of etcdutl

Flags:
  -h, --help               help for etcdutl
  -w, --write-out string   set the output format (fields, json, protobuf, simple, table) (default "simple")

Use "etcdutl [command] --help" for more information about a command.
[root@etcd-node1 ~]#

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## 创建启动服务的目录
[root@etcd-node1 ~]# mkdir -p /srv/etcd/node

## 切换到启动服务目录
[root@etcd-node1 ~]# cd /srv/etcd/node/

## 在后台启动etcd
[root@etcd-node1 node]# nohup etcd &
[1] 1428
[root@etcd-node1 node]# nohup: ignoring input and appending output to ‘nohup.out’

[root@etcd-node1 node]#
[root@etcd-node1 node]#

## 查看etcd进程
[root@etcd-node1 node]# ps -ef|grep etcd
root      1428  1395  0 22:19 pts/0    00:00:00 etcd
root      1437  1395  0 22:19 pts/0    00:00:00 grep --color=always etcd

## 查看etcd监听的端口
[root@etcd-node1 node]# netstat -tunlp|grep etcd
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      1428/etcd
tcp        0      0 127.0.0.1:2380          0.0.0.0:*               LISTEN      1428/etcd

## 查看生成的日志文件
[root@etcd-node1 node]# cat nohup.out
{"level":"warn","ts":"2025-02-27T22:19:50.993387+0800","caller":"embed/config.go:689","msg":"Running http and grpc server on single port. This is not recommended for production."}
{"level":"info","ts":"2025-02-27T22:19:50.993466+0800","caller":"etcdmain/etcd.go:73","msg":"Running: ","args":["etcd"]}
{"level":"warn","ts":"2025-02-27T22:19:50.993482+0800","caller":"etcdmain/etcd.go:105","msg":"'data-dir' was empty; using default","data-dir":"default.etcd"}
{"level":"warn","ts":"2025-02-27T22:19:50.993497+0800","caller":"embed/config.go:689","msg":"Running http and grpc server on single port. This is not recommended for production."}
{"level":"info","ts":"2025-02-27T22:19:50.993503+0800","caller":"embed/etcd.go:140","msg":"configuring peer listeners","listen-peer-urls":["http://localhost:2380"]}
{"level":"info","ts":"2025-02-27T22:19:50.993883+0800","caller":"embed/etcd.go:148","msg":"configuring client listeners","listen-client-urls":["http://localhost:2379"]}
{"level":"info","ts":"2025-02-27T22:19:50.994019+0800","caller":"embed/etcd.go:323","msg":"starting an etcd server","etcd-version":"3.5.18","git-sha":"5bca08e","go-version":"go1.22.11","go-os":"linux","go-arch":"amd64","max-cpu-set":2,"max-cpu-available":2,"member-initialized":false,"name":"default","data-dir":"default.etcd","wal-dir":"","wal-dir-dedicated":"","member-dir":"default.etcd/member","force-new-cluster":false,"heartbeat-interval":"100ms","election-timeout":"1s","initial-election-tick-advance":true,"snapshot-count":100000,"max-wals":5,"max-snapshots":5,"snapshot-catchup-entries":5000,"initial-advertise-peer-urls":["http://localhost:2380"],"listen-peer-urls":["http://localhost:2380"],"advertise-client-urls":["http://localhost:2379"],"listen-client-urls":["http://localhost:2379"],"listen-metrics-urls":[],"cors":["*"],"host-whitelist":["*"],"initial-cluster":"default=http://localhost:2380","initial-cluster-state":"new","initial-cluster-token":"etcd-cluster","quota-backend-bytes":2147483648,"max-request-bytes":1572864,"max-concurrent-streams":4294967295,"pre-vote":true,"initial-corrupt-check":false,"corrupt-check-time-interval":"0s","compact-check-time-enabled":false,"compact-check-time-interval":"1m0s","auto-compaction-mode":"periodic","auto-compaction-retention":"0s","auto-compaction-interval":"0s","discovery-url":"","discovery-proxy":"","downgrade-check-interval":"5s"}
{"level":"info","ts":"2025-02-27T22:19:50.995550+0800","caller":"etcdserver/backend.go:81","msg":"opened backend db","path":"default.etcd/member/snap/db","took":"1.180133ms"}
{"level":"info","ts":"2025-02-27T22:19:50.998132+0800","caller":"etcdserver/raft.go:505","msg":"starting local member","local-member-id":"8e9e05c52164694d","cluster-id":"cdf818194e3a8c32"}
{"level":"info","ts":"2025-02-27T22:19:50.998209+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d switched to configuration voters=()"}
{"level":"info","ts":"2025-02-27T22:19:50.998235+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became follower at term 0"}
{"level":"info","ts":"2025-02-27T22:19:50.998244+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"newRaft 8e9e05c52164694d [peers: [], term: 0, commit: 0, applied: 0, lastindex: 0, lastterm: 0]"}
{"level":"info","ts":"2025-02-27T22:19:50.998251+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became follower at term 1"}
{"level":"info","ts":"2025-02-27T22:19:50.998284+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d switched to configuration voters=(10276657743932975437)"}
{"level":"warn","ts":"2025-02-27T22:19:51.000562+0800","caller":"auth/store.go:1241","msg":"simple token is not cryptographically signed"}
{"level":"info","ts":"2025-02-27T22:19:51.001624+0800","caller":"mvcc/kvstore.go:423","msg":"kvstore restored","current-rev":1}
{"level":"info","ts":"2025-02-27T22:19:51.001646+0800","caller":"etcdserver/server.go:626","msg":"restore consistentIndex","index":0}
{"level":"info","ts":"2025-02-27T22:19:51.002468+0800","caller":"etcdserver/quota.go:94","msg":"enabled backend quota with default value","quota-name":"v3-applier","quota-size-bytes":2147483648,"quota-size":"2.1 GB"}
{"level":"info","ts":"2025-02-27T22:19:51.003493+0800","caller":"etcdserver/server.go:873","msg":"starting etcd server","local-member-id":"8e9e05c52164694d","local-server-version":"3.5.18","cluster-version":"to_be_decided"}
{"level":"info","ts":"2025-02-27T22:19:51.003720+0800","caller":"v3rpc/health.go:61","msg":"grpc service status changed","service":"","status":"SERVING"}
{"level":"info","ts":"2025-02-27T22:19:51.004238+0800","caller":"etcdserver/server.go:757","msg":"started as single-node; fast-forwarding election ticks","local-member-id":"8e9e05c52164694d","forward-ticks":9,"forward-duration":"900ms","election-ticks":10,"election-timeout":"1s"}
{"level":"info","ts":"2025-02-27T22:19:51.004321+0800","caller":"fileutil/purge.go:50","msg":"started to purge file","dir":"default.etcd/member/snap","suffix":"snap.db","max":5,"interval":"30s"}
{"level":"info","ts":"2025-02-27T22:19:51.004336+0800","caller":"fileutil/purge.go:50","msg":"started to purge file","dir":"default.etcd/member/snap","suffix":"snap","max":5,"interval":"30s"}
{"level":"info","ts":"2025-02-27T22:19:51.004345+0800","caller":"fileutil/purge.go:50","msg":"started to purge file","dir":"default.etcd/member/wal","suffix":"wal","max":5,"interval":"30s"}
{"level":"info","ts":"2025-02-27T22:19:51.004667+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d switched to configuration voters=(10276657743932975437)"}
{"level":"info","ts":"2025-02-27T22:19:51.004715+0800","caller":"membership/cluster.go:421","msg":"added member","cluster-id":"cdf818194e3a8c32","local-member-id":"8e9e05c52164694d","added-peer-id":"8e9e05c52164694d","added-peer-peer-urls":["http://localhost:2380"]}
{"level":"info","ts":"2025-02-27T22:19:51.005132+0800","caller":"embed/etcd.go:633","msg":"serving peer traffic","address":"127.0.0.1:2380"}
{"level":"info","ts":"2025-02-27T22:19:51.005143+0800","caller":"embed/etcd.go:603","msg":"cmux::serve","address":"127.0.0.1:2380"}
{"level":"info","ts":"2025-02-27T22:19:51.005162+0800","caller":"embed/etcd.go:292","msg":"now serving peer/client/metrics","local-member-id":"8e9e05c52164694d","initial-advertise-peer-urls":["http://localhost:2380"],"listen-peer-urls":["http://localhost:2380"],"advertise-client-urls":["http://localhost:2379"],"listen-client-urls":["http://localhost:2379"],"listen-metrics-urls":[]}
{"level":"info","ts":"2025-02-27T22:19:51.699503+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d is starting a new election at term 1"}
{"level":"info","ts":"2025-02-27T22:19:51.699546+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became pre-candidate at term 1"}
{"level":"info","ts":"2025-02-27T22:19:51.699573+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d received MsgPreVoteResp from 8e9e05c52164694d at term 1"}
{"level":"info","ts":"2025-02-27T22:19:51.699585+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became candidate at term 2"}
{"level":"info","ts":"2025-02-27T22:19:51.699589+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d received MsgVoteResp from 8e9e05c52164694d at term 2"}
{"level":"info","ts":"2025-02-27T22:19:51.699596+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"8e9e05c52164694d became leader at term 2"}
{"level":"info","ts":"2025-02-27T22:19:51.699626+0800","logger":"raft","caller":"etcdserver/zap_raft.go:77","msg":"raft.node: 8e9e05c52164694d elected leader 8e9e05c52164694d at term 2"}
{"level":"info","ts":"2025-02-27T22:19:51.700210+0800","caller":"etcdserver/server.go:2652","msg":"setting up initial cluster version using v2 API","cluster-version":"3.5"}
{"level":"info","ts":"2025-02-27T22:19:51.700709+0800","caller":"etcdserver/server.go:2141","msg":"published local member to cluster through raft","local-member-id":"8e9e05c52164694d","local-member-attributes":"{Name:default ClientURLs:[http://localhost:2379]}","request-path":"/0/members/8e9e05c52164694d/attributes","cluster-id":"cdf818194e3a8c32","publish-timeout":"7s"}
{"level":"info","ts":"2025-02-27T22:19:51.700830+0800","caller":"embed/serve.go:124","msg":"ready to serve client requests"}
{"level":"info","ts":"2025-02-27T22:19:51.701331+0800","caller":"v3rpc/health.go:61","msg":"grpc service status changed","service":"","status":"SERVING"}
{"level":"info","ts":"2025-02-27T22:19:51.701670+0800","caller":"embed/serve.go:210","msg":"serving client traffic insecurely; this is strongly discouraged!","traffic":"grpc+http","address":"127.0.0.1:2379"}
{"level":"info","ts":"2025-02-27T22:19:51.701745+0800","caller":"membership/cluster.go:584","msg":"set initial cluster version","cluster-id":"cdf818194e3a8c32","local-member-id":"8e9e05c52164694d","cluster-version":"3.5"}
{"level":"info","ts":"2025-02-27T22:19:51.701803+0800","caller":"api/capability.go:75","msg":"enabled capabilities for version","cluster-version":"3.5"}
{"level":"info","ts":"2025-02-27T22:19:51.701820+0800","caller":"etcdserver/server.go:2676","msg":"cluster version is updated","cluster-version":"3.5"}
{"level":"info","ts":"2025-02-27T22:19:51.702196+0800","caller":"etcdmain/main.go:44","msg":"notifying init daemon"}
{"level":"info","ts":"2025-02-27T22:19:51.702230+0800","caller":"etcdmain/main.go:50","msg":"successfully notified init daemon"}
[root@etcd-node1 node]#

1
2
3
4
5
6
7
8
9

## 设置键值
[root@etcd-node1 ~]# etcdctl put greeting "Hello, etcd"
OK

## 获取键greeting的值
[root@etcd-node1 ~]# etcdctl get greeting
greeting
Hello, etcd
[root@etcd-node1 ~]#

1
2
3
4
5
6

[root@etcd-node1 ~]# find /srv/etcd/node -type f
/srv/etcd/node/nohup.out
/srv/etcd/node/default.etcd/member/snap/db
/srv/etcd/node/default.etcd/member/wal/0000000000000000-0000000000000000.wal
/srv/etcd/node/default.etcd/member/wal/0.tmp
[root@etcd-node1 ~]#

1
2
3

[root@etcd-node1 ~]# ps -ef|grep -v grep|grep etcd
root      1428  1395  0 22:19 pts/0    00:00:03 etcd
[root@etcd-node1 ~]# ps -ef|grep -v grep|grep etcd|awk '{print $2}'|xargs kill -9