This page contains the list of deprecations and important or breaking changes for Vault 0.10.0 compared to 0.9.0. Please read it carefully.
Changes Since 0.9.6
Database Plugin Compatibility
The database plugin interface was enhanced to support some additional functionality related to root credential rotation and supporting templated URL strings. The changes were made in a backwards-compatible way and all builtin plugins were updated with the new features. Custom plugins not built into Vault will need to be upgraded to support templated URL strings and root rotation. Additionally, the Initialize method was deprecated in favor of a new Init method that supports configuration modifications that occur in the plugin back to the primary data store.
Removal of Returned Secret Information
For a long time Vault has returned configuration given to various secret engines and auth methods with secret values (such as secret API keys or passwords) still intact, and with a warning to the user on write that anyone with read access could see the secret. This was mostly done to make it easy for tools like Terraform to judge whether state had drifted. However, it also feels quite un-Vault-y to do this and we've never felt very comfortable doing so. In 0.10 we have gone through and removed this bevhavior from the various backends; fields which contained secret values are simply no longer returned on read. We are working with the Terraform team to make changes to their provider to accommodate this as best as possible, and users of other tools may have to make adjustments, but in the end we felt that the ends did not justify the means and we needed to prioritize security over operational convenience.
LDAP Auth Method Case Sensitivity
We now treat usernames and groups configured locally for policy assignment in a
case insensitive fashion by default. Existing configurations will continue to
work as they do now; however, the next time a configuration is written
case_sensitive_names will need to be explicitly set to
TTL Handling Moved to Core
All lease TTL handling has been centralized within the core of Vault to ensure consistency across all backends. Since this was previously delegated to individual backends, there may be some slight differences in TTLs generated from some backends.
secret/ Mount is Deprecated
In 0.12 we will stop mounting
secret/ by default at initialization time (it
will still be available in
Full List Since 0.9.0
Change to AWS Role Output
The AWS authentication backend now allows binds for inputs as either a comma-delimited string or a string array. However, to keep consistency with input and output, when reading a role the binds will now be returned as string arrays rather than strings.
Change to AWS IAM Auth ARN Prefix Matching
In order to prefix-match IAM role and instance profile ARNs in AWS auth
backend, you now must explicitly opt-in by adding a
* to the end of the ARN.
Existing configurations will be upgraded automatically, but when writing a new
role configuration the updated behavior will be used.
Backwards Compatible CLI Changes
This upgrade guide is typically reserved for breaking changes, however it is worth calling out that the CLI interface to Vault has been completely revamped while maintaining backwards compatibility. This could lead to potential confusion while browsing the latest version of the Vault documentation on vaultproject.io.
All previous CLI commands should continue to work and are backwards compatible in almost all cases.
sys/health DR Secondary Reporting
replication_dr_secondary bool returned by
sys/health could be
misleading since it would be
false both when a cluster was not a DR secondary
but also when the node is a standby in the cluster and has not yet fully
received state from the active node. This could cause health checks on LBs to
decide that the node was acceptable for traffic even though DR secondaries
cannot handle normal Vault traffic. (In other words, the bool could only convey
"yes" or "no" but not "not sure yet".) This has been replaced by
replication_perf_mode which are string values that
convey the current state of the node; a value of
disabled indicates that
replication is disabled or the state is still being discovered. As a result, an
LB check can positively verify that the node is both not
disabled and is not
a DR secondary, and avoid sending traffic to it if either is true.
PKI Secret Backend Roles Parameter Types
organization in role definitions in the PKI secret backend,
input can now be a comma-separated string or an array of strings. Reading a
role will now return arrays for these parameters.
Plugin API Changes
The plugin API has been updated to utilize golang's context.Context package. Many function signatures now accept a context object as the first parameter. Existing plugins will need to pull in the latest Vault code and update their function signatures to begin using context and the new gRPC transport.
AppRole Case Sensitivity
In prior versions of Vault,
list operations against AppRole roles would
require preserving case in the role name, even though most other operations
within AppRole are case-insensitive with respect to the role name. This has
been fixed; existing roles will behave as they have in the past, but new roles
will act case-insensitively in these cases.
Token Auth Backend Roles Parameter Types
disallowed_policies in role definitions in the
token auth backend, input can now be a comma-separated string or an array of
strings. Reading a role will now return arrays for these parameters.
Transit Key Exporting
You can now mark a key in the
transit backend as
exportable at any time,
rather than just at creation time; however, once this value is set, it still
cannot be unset.
PKI Secret Backend Roles Parameter Types
key_usage in role definitions in the PKI secret
backend, input can now be a comma-separated string or an array of strings.
Reading a role will now return arrays for these parameters.
SSH Dynamic Keys Method Defaults to 2048-bit Keys
When using the dynamic key method in the SSH backend, the default is now to use 2048-bit keys if no specific key bit size is specified.
Consul Secret Backend Lease Handling
consul secret backend can now accept both strings and integer numbers of
seconds for its lease value. The value returned on a role read will be an
integer number of seconds instead of a human-friendly string.
Unprintable Characters Not Allowed in API Paths
Unprintable characters are no longer allowed in names in the API (paths and path parameters), with an extra restriction on whitespace characters. Allowed characters are those that are considered printable by Unicode plus spaces.