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Command: operator debug

The operator debug command builds an archive containing Nomad cluster configuration and state information, Nomad server and client node logs, and pprof profiles from the selected servers and client nodes.

If no selection option is specified, the debug archive contains only cluster meta information.

Usage

nomad operator debug [options]

This command accepts comma separated server-id and node-id IDs for monitoring and pprof profiling. If IDs are provided, the command will monitor logs for the duration, saving a snapshot of Nomad state every interval. Captured logs and configurations are subjected to redaction, but may still contain sensitive information and the archive contents should be reviewed before sharing.

If an output path is provided, debug will create a timestamped directory in that path instead of an archive. By default, the command creates a compressed tar archive in the current directory.

Consul and Vault status and version information are included if configured.

If ACLs are enabled, this command will require a token with the 'node:read' capability to run. In order to collect information, the token will also require the 'agent:read' and 'operator:read' capabilities, as well as the 'list-jobs' capability for all namespaces. To collect pprof profiles the token will also require 'agent:write', or enable_debug configuration set to true.

General Options

  • -address=<addr>: The address of the Nomad server. Overrides the NOMAD_ADDR environment variable if set. Defaults to http://127.0.0.1:4646.

  • -region=<region>: The region of the Nomad server to forward commands to. Overrides the NOMAD_REGION environment variable if set. Defaults to the Agent's local region.

  • -namespace=<namespace>: The target namespace for queries and actions bound to a namespace. Overrides the NOMAD_NAMESPACE environment variable if set. If set to '*', job and alloc subcommands query all namespaces authorized to user. Defaults to the "default" namespace.

  • -no-color: Disables colored command output. Alternatively, NOMAD_CLI_NO_COLOR may be set. This option takes precedence over -force-color.

  • -force-color: Forces colored command output. This can be used in cases where the usual terminal detection fails. Alternatively, NOMAD_CLI_FORCE_COLOR may be set. This option has no effect if -no-color is also used.

  • -ca-cert=<path>: Path to a PEM encoded CA cert file to use to verify the Nomad server SSL certificate. Overrides the NOMAD_CACERT environment variable if set.

  • -ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Nomad server SSL certificate. If both -ca-cert and -ca-path are specified, -ca-cert is used. Overrides the NOMAD_CAPATH environment variable if set.

  • -client-cert=<path>: Path to a PEM encoded client certificate for TLS authentication to the Nomad server. Must also specify -client-key. Overrides the NOMAD_CLIENT_CERT environment variable if set.

  • -client-key=<path>: Path to an unencrypted PEM encoded private key matching the client certificate from -client-cert. Overrides the NOMAD_CLIENT_KEY environment variable if set.

  • -tls-server-name=<value>: The server name to use as the SNI host when connecting via TLS. Overrides the NOMAD_TLS_SERVER_NAME environment variable if set.

  • -tls-skip-verify: Do not verify TLS certificate. This is highly not recommended. Verification will also be skipped if NOMAD_SKIP_VERIFY is set.

  • -token: The SecretID of an ACL token to use to authenticate API requests with. Overrides the NOMAD_TOKEN environment variable if set.

Debug Options

  • -duration=2m: Set the duration of the debug capture. Logs will be captured from specified servers and nodes at log-level. Defaults to 2m.

  • -interval=30s: The interval between snapshots of the Nomad state. If unspecified, only one snapshot is captured. Defaults to 30s.

  • -log-level=DEBUG: The log level to monitor. Defaults to DEBUG.

  • -max-nodes=<count>: Cap the maximum number of client nodes included in the capture. Defaults to 10, set to 0 for unlimited.

  • -node-class=<node-class>: Filter client nodes based on node class.

  • -node-id=<node1>,<node2>: Comma separated list of Nomad client node ids to monitor for logs, API outputs, and pprof profiles. Accepts id prefixes, and "all" to select all nodes (up to count = max-nodes). Defaults to all.

  • -pprof-duration=<duration>: Duration for pprof collection. Defaults to 1s or -duration, whichever is less.

  • -pprof-interval=<pprof-interval>: The interval between pprof collections. Set interval equal to duration to capture a single snapshot. Defaults to 250ms or -pprof-duration, whichever is less.

  • -server-id=<server1>,<server2>: Comma separated list of Nomad server names to monitor for logs, API outputs, and pprof profiles. Accepts server names, "leader", or "all". Defaults to all.

  • -stale=<true|false>: If "false", the default, get membership data from the cluster leader. If the cluster is in an outage unable to establish leadership, it may be necessary to get the configuration from a non-leader server.

  • -event-topic=<allocation,evaluation,job,node,*>:<filter>: Enable event stream capture. Filter by comma delimited list of topic filters or "all". Defaults to "none" (disabled). Refer to the Events API for additional detail.

  • -verbose: Enable verbose output

  • -output=path: Path to the parent directory of the output directory. Defaults to the current directory. If specified, no archive is built.

  • -consul-http-addr=<addr>: The address and port of the Consul HTTP agent. Overrides the CONSUL_HTTP_ADDR environment variable.

  • -consul-token=<token>: Token used to query Consul. Overrides the CONSUL_HTTP_TOKEN environment variable and the Consul token file.

  • -consul-token-file=<path>: Path to the Consul token file. Overrides the CONSUL_HTTP_TOKEN_FILE environment variable.

  • -consul-client-cert=<path>: Path to the Consul client cert file. Overrides the CONSUL_CLIENT_CERT environment variable.

  • -consul-client-key=<path>: Path to the Consul client key file. Overrides the CONSUL_CLIENT_KEY environment variable.

  • -consul-ca-cert=<path>: Path to a CA file to use with Consul. Overrides the CONSUL_CACERT environment variable and the Consul CA path.

  • -consul-ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Consul certificate. Overrides the CONSUL_CAPATH environment variable.

  • -vault-address=<addr>: The address and port of the Vault HTTP agent. Overrides the VAULT_ADDR environment variable.

  • -vault-token=<token>: Token used to query Vault. Overrides the VAULT_TOKEN environment variable.

  • -vault-client-cert=<path>: Path to the Vault client cert file. Overrides the VAULT_CLIENT_CERT environment variable.

  • -vault-client-key=<path>: Path to the Vault client key file. Overrides the VAULT_CLIENT_KEY environment variable.

  • -vault-ca-cert=<path>: Path to a CA file to use with Vault. Overrides the VAULT_CACERT environment variable and the Vault CA path.

  • -vault-ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Vault certificate. Overrides the VAULT_CAPATH environment variable.

Output

This command prints a summary of the capture and the name of the timestamped archive file produced.

Examples

$ nomad operator debug -duration 5s -interval 5s -server-id all -node-id b5,20
Starting debugger...

          Servers: (3/3) [server1.global server2.global server3.global]
          Clients: (2/3) [b547cd3a-085f-68c2-55f4-e99beebb0433 20c0964b-72cc-4083-87fe-ec6905b6230a]
         Interval: 5s
         Duration: 5s

Capturing cluster data...
    Capture interval 0000
    Capture interval 0001
    Capture interval 0002
    Capture interval 0003
Created debug archive: nomad-debug-2020-12-08-034455Z.tar.gz

$ nomad operator debug -duration 5s -interval 5s -server-id all -node-id all -max-nodes=1
Starting debugger...

          Servers: (3/3) [server1.global server2.global server3.global]
          Clients: (1/3) [b547cd3a-085f-68c2-55f4-e99beebb0433]
                   Max node count reached (1)
         Interval: 5s
         Duration: 5s

Capturing cluster data...
    Capture interval 0000
    Capture interval 0001
    Capture interval 0002
    Capture interval 0003
Created debug archive: nomad-debug-2020-12-08-034113Z.tar.gz
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