PowerStore: come utilizzare l'API REST di PowerStore

Diversi strumenti possono essere utilizzati per testare REST API, tra cui Postman, HTTPiee cURL. In questo articolo: cURL viene utilizzato per tutti gli esempi perché è prontamente disponibile sulla maggior parte dei sistemi operativi per impostazione predefinita.

Utilizzo comune dell'API REST:

• Stato di integrità del nodo

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/hardware?select=id,name,type,lifecycle_state?type=eq.Node

Esempio di output:

{"id":"00b941ceea9243f0a36e85abe9504214","name":"BaseEnclosure-NodeB","type":"Node","lifecycle_state":"Healthy"}, 
{"id":"2877d096fd2a4cc4b3b8af97f21c1c24","name":"BaseEnclosure-NodeA","type":"Node","lifecycle_state":"Healthy"}

• Stati di replica 

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/replication_session?select=id,role,state,last_sync_timestamp,local_resource_id

Esempio di output:

{"id":"047e38ee-9aeb-4761-8ca5-393204fe6584","role":"Metro_Preferred","state":"OK","last_sync_timestamp":"2026-07-16T15:48:05.628263+00:00","local_resource_id":"d34bd80e-1d43-4692-ab37-e307bc92eb73"}, 
{"id":"26dd4105-a24f-4d82-b40b-20dcefbfe5df","role":"Source","state":"OK","last_sync_timestamp":"2026-07-16T15:31:54.64127+00:00","local_resource_id":"82c40277-dee4-46de-8559-920fe5f942cc"}, 
{"id":"414dba20-08b1-4d5e-a521-517a3b37473a","role":"Metro_Preferred","state":"OK","last_sync_timestamp":"2026-07-16T15:51:05.525764+00:00","local_resource_id":"eb970724-cc3e-4661-8d71-bec7f44baf10"}

• Avvisi di sistema

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/alert?select=id,event_code,severity,resource_type,generated_timestamp,state,description_l10n

Esempio di output:

{"id":"008abb47-e72d-4608-b915-b8c01328b64e","event_code":"0x01700304","severity":"Major","resource_type":"remote_system","generated_timestamp":"2026-05-11T01:51:01.280627+00:00","state":"ACTIVE","description_l10n":"All data connections from the remote system Ghost are disconnected."}, 
{"id":"01114811-82a9-484e-8cf9-3da50c0e3d7b","event_code":"0x01701801","severity":"Info","resource_type":"volume","generated_timestamp":"2026-07-14T02:15:34.764524+00:00","state":"CLEARED","description_l10n":"Metro witness configured for resource HyperV-Node1 is engaged."}

• Eventi di audit

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/audit_event?select=id,type,timestamp,username,resource_type,resource_action,message_l10n,client_address

L'output può essere enorme e deve essere filtrato. Ad esempio, per visualizzare gli eventi relativi all'amministratore utente. Prova:

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/audit_event?select=id,type,timestamp,username,resource_type,resource_action,message_l10n,client_address?username=eq.admin

Esempio di output:

{"id":"111540","type":"Config","timestamp":"2026-03-11T20:25:57.267124+00:00","username":"admin","resource_type":"host","resource_action":"delete","message_l10n":"Successfully deleted host with name: Thors 183.24 (iSCSI) and ID: c698f28b-49ac-4268-a9c7-c6da66bdfbc8.","client_address":"10.158.49.47"}, 
{"id":"111541","type":"Config","timestamp":"2026-03-11T20:25:57.337655+00:00","username":"admin","resource_type":"host","resource_action":"delete","message_l10n":"Successfully deleted metadata with keys: [] associated with the resource with type: host and ID: c698f28b-49ac-4268-a9c7-c6da66bdfbc8.","client_address":"10.158.49.47"}

• Elenco delle snapshot

curl -H "Accept: application/json"  -u "admin:********" -X GET -k https://xx.xx.xx.xx/api/rest/volume_snap_list_cma_view?select=id,name,source_timestamp,description,creation_timestamp

Esempio di output:

{"id":"24d7856d-d389-4f05-9752-ebb1de61a6d6","name":"Walid Snaps.PowerTriage-RHEL (Walid DO NOT DELETE).2026-07-15T00:00:00Z 189403910","source_timestamp":"2026-07-15T00:03:16.096762+00:00","description":"","creation_timestamp":"2026-07-15T00:03:16.096762+00:00"},
{"id":"2cfd727f-b09c-4895-8fd5-93850fd63698","name":"Daily-File.7DSL0M2-1-001.2026-07-14T00:08:08Z 281536767","source_timestamp":"2026-07-14T00:08:08.618343+00:00","description":null,"creation_timestamp":"2026-07-14T00:08:08.618343+00:00"}

• Metrica delle prestazioni

curl -H "Accept: application/json" -H "Content-Type: application/json" -u "admin:********" -X POST -k https://xx.xx.xx.xx/api/rest/metrics/generate  -d '{ "entity": "performance_metrics_by_appliance", "entity_id": "A1","interval": "One_Day" }'|jq '.'

Esempio di output:

{
  "appliance_id": "A1",
  "timestamp": "2026-07-15T00:00:00Z",
  "avg_read_latency": 172.76094,
  "avg_write_latency": 404.14536,
  "avg_mirror_write_latency": 924.59375,
  "avg_mirror_overhead_latency": 364.82297,
  "avg_latency": 273.2135,
  "avg_read_size": 91601.2,
  "avg_write_size": 6204.5635,
  "avg_io_size": 54527.355,
  "avg_read_iops": 9.996701,
  "avg_write_iops": 7.669595,
  "avg_mirror_write_iops": 0.024386574,
  "avg_total_iops": 17.666296,
  "avg_read_bandwidth": 915709.9,
  "avg_write_bandwidth": 47586.49,
  "avg_mirror_write_bandwidth": 190.67259,
  "avg_total_bandwidth": 963296.4,
  "avg_io_workload_cpu_utilization": 0.00399437453597784,
  "max_avg_read_latency": 401.14688,
  "max_avg_write_latency": 1679.9584,
  "max_avg_latency": 652.1067,
  "max_avg_mirror_write_latency": 3842,
  "max_avg_mirror_overhead_latency": 3319,
  "max_avg_read_size": 99656.45,
  "max_avg_write_size": 30189.037,
  "max_avg_io_size": 85726.97,
  "max_read_iops": 161.2,
  "max_write_iops": 680.6,
  "max_mirror_write_iops": 3.8,
  "max_total_iops": 834,
  "max_read_bandwidth": 8509440,
  "max_write_bandwidth": 8792986,
  "max_mirror_write_bandwidth": 22732.8,
  "max_total_bandwidth": 17252044,
  "max_io_workload_cpu_utilization": 0.2170485556125641,
  "repeat_count": 1,
  ...
  "response_definition": "performance_metrics_by_appliance_rollup",
  "entity": "performance_metrics_by_appliance"
}

Errori comuni con l'API REST:

Aggiunta la sezione .-v" al tuo curl per visualizzare l'errore. 

• Esempio 1: credenziale errata

curl -H "Accept: application/json"  -u "admin:wrong_password" -k https://10.241.219.160/api/rest/hardware?select=id,name,type,lifecycle_state?type=eq.Node
* Request completely sent off
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
< HTTP/1.1 401 Unauthorized
< WWW-Authenticate: SSOCustom realm="Cyclone Realm"
< content-type: application/json
< content-length: 

• Esempio 2: Httpd non è in esecuzione

curl -v -H "Accept: application/json"  -u "admin:********" -k https://xx.xx.xx.xx/api/rest/hardware?select=id,name,type,lifecycle_state?type=eq.Node
*   Trying xx.xx.xx.xx:443...
* connect to xx.xx.xx.xx port 443 from xx.xx.xx.xx port 59124 failed: Connection timed out
* Failed to connect to xx.xx.xx.xx port 443 after 31939 ms: Could not connect to server
* closing connection #0
curl: (28) Failed to connect to xx.xx.xx.xx port 443 after 31939 ms: Could not connect to server

• Esempio 3: Sintassi errata senza tipo di contenuto

curl -v -H "Accept: application/json" -u "admin:********" -X POST -k https://xx.xx.xx.xx/api/rest/metrics/generate  -d '{ "entity": "performance_metrics_by_appliance", "entity_id": "A1","interval": "One_Day" }'
{"messages":[{"severity":"Error","code":"0xE04040030001","message_l10n":"Validation failed: Request Content-Type header '[application/x-www-form-urlencoded]' does not match any allowed types. Must be one of: [application/json]., A request body is required but none found..","arguments":[{"delimiter":", ","messages":[{"severity":"Error","code":"validation.request.contentType.notAllowed","message_l10n":"Request Content-Type header '[application/x-www-form-urlencoded]' does not match any allowed types. Must be one of: [application/json].","arguments":["[application/x-www-form-urlencoded]","[application/json]"]},{"severity":"Error","code":"validation.request.body.missing","message_l10n":"A request body is required but none found."}]}]}]}

Link utili:

• https://dl.dell.com/content/manual55475248-dell-powerstore-rest-api-developers-guide.pdf?language=en-us
• https://< PWST_CLUSTER_IP>/spavalderia/