Mount a writable volume to /var/log

Solution:Step 1: Identify cause of failureWriting to /var/log/app.log fails because the root filesystem is read-only.Step 2: Fix by mounting writable volumeMounting a writable volume to /var/log allows writes there while keeping root FS read-only.Final Answer:Mount a writable volume to /var/log -> O

[Solved] A developer runs:docker run --read-only alpine sh -c "echo test > /var/log/app.log"But the command fails. How can this be fixed without removing --read-only? | Docker

Docker - Security

A developer runs:
docker run --read-only alpine sh -c "echo test > /var/log/app.log"
But the command fails. How can this be fixed without removing --read-only?

AMount a writable volume to <code>/var/log</code>

BRemove the <code>sh -c</code> part

CAdd <code>--network=host</code>

DIncrease container CPU shares

Step-by-Step Solution

Solution:

Step 1: Identify cause of failure
Writing to /var/log/app.log fails because the root filesystem is read-only.
Step 2: Fix by mounting writable volume
Mounting a writable volume to /var/log allows writes there while keeping root FS read-only.
Final Answer:
Mount a writable volume to /var/log -> Option A
Quick Check:
Writable volume needed for write paths on read-only FS [OK]

Quick Trick: Mount writable volume for paths needing writes [OK]

Common Mistakes:

Removing shell command does not fix FS writes
Network or CPU options unrelated
Trying to write without writable mount

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A developer runs:

Step 1: Identify cause of failure

Step 2: Fix by mounting writable volume

Final Answer:

Quick Check:

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