如何实现Openstack fernet token 解析

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针对Newton 版本

Keystone.conf

1.expiration

# The amount of time that a token should remain valid (in seconds). Drastically# reducing this value may break "long-running" operations that involve multiple# services to coordinate together, and will force users to authenticate with# keystone more frequently. Drastically increasing this value will increase# load on the `[token] driver`, as more tokens will be simultaneously valid.# Keystone tokens are also bearer tokens, so a shorter duration will also# reduce the potential security impact of a compromised token. (integer value)# Minimum value: 0# Maximum value: 9223372036854775807#expiration = 3600

token 过期时间，默认一个小时

2.max_active_keys

# This controls how many keys are held in rotation by `keystone-manage# fernet_rotate` before they are discarded. The default value of 3 means that# keystone will maintain one staged key (always index 0), one primary key (the# highest numerical index), and one secondary key (every other index).# Increasing this value means that additional secondary keys will be kept in# the rotation. (integer value)# Minimum value: 1#max_active_keys = 3

最大的active key 数目，默认是3

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