Managed vs inline policies in AWS - Visual Side-by-Side Comparison

Process Flow - Managed vs inline policies

Start: Need to assign permissions

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Choose policy type

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Managed Policy

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Attach to user/group/role

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Permissions applied to identity

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Use AWS resources with permissions

This flow shows choosing between managed and inline policies, attaching them to identities, and applying permissions.

Execution Sample

AWS

1. Create managed policy
2. Attach managed policy to user
3. Create inline policy
4. Attach inline policy to user
5. User gets permissions from both

This sequence shows creating and attaching managed and inline policies to a user to grant permissions.

Process Table

Step	Action	Policy Type	Attachment Target	Effect on User Permissions
1	Create policy 'ReadOnlyAccess'	Managed	None	No effect yet
2	Attach 'ReadOnlyAccess' to user Alice	Managed	User Alice	Alice gains ReadOnlyAccess permissions
3	Create inline policy 'CustomWriteAccess' for Alice	Inline	User Alice	No effect yet
4	Attach inline policy 'CustomWriteAccess' to Alice	Inline	User Alice	Alice gains CustomWriteAccess permissions
5	User Alice tries to read S3 bucket	Both	User Alice	Allowed by ReadOnlyAccess managed policy
6	User Alice tries to write to S3 bucket	Both	User Alice	Allowed by CustomWriteAccess inline policy
7	Detach managed policy from Alice	Managed	User Alice	Alice loses ReadOnlyAccess permissions
8	User Alice tries to read S3 bucket	Inline only	User Alice	Denied (no managed policy)
9	Delete inline policy from Alice	Inline	User Alice	Alice loses CustomWriteAccess permissions
10	User Alice tries to write to S3 bucket	No policies	User Alice	Denied (no permissions)

💡 Execution stops after all policies are detached and user has no permissions.

Status Tracker

Variable	Start	After Step 2	After Step 4	After Step 7	After Step 9	Final
User Alice Permissions	None	ReadOnlyAccess	ReadOnlyAccess + CustomWriteAccess	CustomWriteAccess	None	None

Key Moments - 3 Insights

Why does Alice lose read permissions after detaching the managed policy?

Because the managed policy 'ReadOnlyAccess' was the source of read permissions. After step 7 in the execution_table, detaching it removes those permissions.

Can inline policies be shared across multiple users?

No, inline policies are embedded directly in a single user, group, or role. This is shown in step 3 and 4 where the inline policy is created and attached only to Alice.

What happens if both managed and inline policies grant permissions?

Permissions are combined. In step 6, Alice can write because the inline policy grants write access, while managed policy grants read access.

Visual Quiz - 3 Questions

Look at the execution_table, what permissions does Alice have after step 4?

A Only ReadOnlyAccess

B Only CustomWriteAccess

C Both ReadOnlyAccess and CustomWriteAccess

D No permissions

💡 Hint

Check the 'Effect on User Permissions' column at step 4.

At which step does Alice lose all permissions?

A Step 9

B Step 10

C Step 7

D Step 8

💡 Hint

Look for when both managed and inline policies are detached and user is denied permissions.

If the inline policy was never attached, what would Alice's permissions be after step 2?

A No permissions

B Only ReadOnlyAccess

C Only CustomWriteAccess

D Both ReadOnlyAccess and CustomWriteAccess

💡 Hint

Refer to step 2 where only the managed policy is attached.

Concept Snapshot

Managed vs Inline Policies:
- Managed policies are standalone and reusable.
- Inline policies are embedded in one identity.
- Attach managed or inline policies to users/groups/roles.
- Permissions from both combine.
- Detaching removes permissions granted by that policy.

Full Transcript

This visual execution shows how AWS managed and inline policies work. First, a managed policy is created and attached to a user, granting permissions. Then an inline policy is created and attached to the same user, adding more permissions. The user gains combined permissions from both. When the managed policy is detached, the user loses those permissions but keeps inline policy permissions. Finally, removing the inline policy leaves the user with no permissions. This demonstrates how managed policies are reusable and separate, while inline policies are embedded and specific to one identity.