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deck file patch

Apply patches on top of a decK file.

The input file is read, the patches are applied, and if successful, written to the output file. The patches can be specified by a --selector and one or more --value tags, or via patch files.

When using --selector and --values, the items are selected by the selector, which is a JSONPath query. From the array of nodes found, only the objects are updated. The values are applied on each of the JSONObjects returned by the selector.

The value must be a valid JSON snippet, so use single/double quotes appropriately. If the value is empty, the field is removed from the object.

Examples of valid values:

# set field "read_timeout" to a numeric value of 10000
--selector="$..services[*]" --value="read_timeout:10000"

# set field "_comment" to a string value
--selector="$..services[*]" --value='_comment:"comment injected by patching"'

# set field "_ignore" to an array of strings
--selector="$..services[*]" --value='_ignore:["ignore1","ignore2"]'

# remove fields "_ignore" and "_comment" from the object
--selector="$..services[*]" --value='_ignore:' --value='_comment:'

# append entries to the methods array of all route objects
--selector="$..routes[*].methods" --value='["OPTIONS"]'

Patch files have the following format (JSON or YAML) and can contain multiple patches that are applied in order:

{ "_format_version": "1.0",
  "patches": [
    { "selectors": [
        "$..services[*]"
      ],
      "values": {
        "read_timeout": 10000,
        "_comment": "comment injected by patching"
      },
      "remove": [ "_ignore" ]
    }
  ]
}

If the values object instead is an array, then any arrays returned by the selectors will get the values appended to them.

Syntax

deck file patch [command-specific flags] [global flags] [...patch-files]

Examples

# update the read-timeout on all services
cat kong.yml | deck file patch --selector="$..services[*]" --value="read_timeout:10000"

Flags

--format
Output format: yaml or json. (Default: "yaml")
-h, --help
Help for patch.
-o, --output-file
Output file to write to. Use - to write to stdout. (Default: "-")
--selector
json-pointer identifying the element to patch. Repeat for multiple selectors.

Warning: The JSONPath implementation has a known issue related to recursive descent with expressions. Expressions following a recursive descent do not work as expected, however, a workaround is available by preceding the expression with a wildcard selection. For example, $..plugins[?(@.regex_priority>100)] must be expressed as $..plugins[*][?(@.regex_priority>100)]. See the go-apiops library documentation for details on this issue.

-s, --state
decK file to process. Use - to read from stdin. (Default: "-")
--value
A value to set in the selected entry in <key:value> format. Can be specified multiple times.

Global flags

--analytics
Share anonymized data to help improve decK. Use --analytics=false to disable this. (Default: true)
--ca-cert
Custom CA certificate (raw contents) to use to verify Kong’s Admin TLS certificate. This value can also be set using DECK_CA_CERT environment variable. This takes precedence over --ca-cert-file flag.
--ca-cert-file
Path to a custom CA certificate to use to verify Kong’s Admin TLS certificate. This value can also be set using DECK_CA_CERT_FILE environment variable.
--config
Config file (default is $HOME/.deck.yaml).
--headers
HTTP headers (key:value) to inject in all requests to Kong’s Admin API. This flag can be specified multiple times to inject multiple headers.
--kong-addr
HTTP address of Kong’s Admin API. This value can also be set using the environment variable DECK_KONG_ADDR environment variable. (Default: "http://localhost:8001")
--kong-cookie-jar-path
Absolute path to a cookie-jar file in the Netscape cookie format for auth with Admin Server. You may also need to pass in as header the User-Agent that was used to create the cookie-jar.
--konnect-addr
Address of the Konnect endpoint. (Default: "https://us.api.konghq.com")
--konnect-token
Token associated with your Konnect account. This takes precedence over the --konnect-token-file flag.
--konnect-token-file
File containing the token associated with your Konnect account.
--konnect-control-plane-name
Konnect control plane name.
--no-color
Disable colorized output (Default: false)
--skip-workspace-crud
Skip API calls related to Workspaces (Kong Gateway Enterprise only). (Default: false)
--timeout
Set a request timeout for the client to connect with Kong (in seconds). (Default: 10)
--tls-client-cert
PEM-encoded TLS client certificate to use for authentication with Kong’s Admin API. This value can also be set using DECK_TLS_CLIENT_CERT environment variable. Must be used in conjunction with tls-client-key
--tls-client-cert-file
Path to the file containing TLS client certificate to use for authentication with Kong’s Admin API. This value can also be set using DECK_TLS_CLIENT_CERT_FILE environment variable. Must be used in conjunction with tls-client-key-file
--tls-client-key
PEM-encoded private key for the corresponding client certificate . This value can also be set using DECK_TLS_CLIENT_KEY environment variable. Must be used in conjunction with tls-client-cert
--tls-client-key-file
Path to file containing the private key for the corresponding client certificate. This value can also be set using DECK_TLS_CLIENT_KEY_FILE environment variable. Must be used in conjunction with tls-client-cert-file
--tls-server-name
Name to use to verify the hostname in Kong’s Admin TLS certificate. This value can also be set using DECK_TLS_SERVER_NAME environment variable.
--tls-skip-verify
Disable verification of Kong’s Admin TLS certificate. This value can also be set using DECK_TLS_SKIP_VERIFY environment variable. (Default: false)
--verbose
Enable verbose logging levels Setting this value to 2 outputs all HTTP requests/responses between decK and Kong. (Default: 0)

See also

File subcommands: