GPG Error during installation

[burakoslu24]

I this error during the installation:

W: GPG error: http://repo.mysql.com/apt/ubuntu trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
E: The repository 'http://repo.mysql.com/apt/ubuntu trusty InRelease' is not signed.
The command '/bin/sh -c apt-get update' returned a non-zero code: 100
ERROR: Service 'mysql' failed to build : Build failed

I tried adding the missing certificate via sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29

Suggestions?

[burakoslu24]

@Ostico

[AhmedWagdi1]

Facing same error:
`
=> ERROR [matecat-bionic-mysql 10/21] RUN apt-get update 3.8s
=> CANCELED [matecat-bionic-filters 6/10] RUN apt-get install -y git software-properties-common && add-apt-repository -y ppa:openjdk-r/ppa && apt-get update 3.4s

[matecat-bionic-mysql 10/21] RUN apt-get update:
#0 1.040 Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
#0 1.040 Hit:2 http://security.ubuntu.com/ubuntu bionic-security InRelease
#0 1.069 Get:3 http://repo.mysql.com/apt/ubuntu trusty InRelease [34.0 kB]
#0 1.085 Hit:4 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
#0 1.144 Hit:5 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
#0 1.590 Err:3 http://repo.mysql.com/apt/ubuntu trusty InRelease
#0 1.590 The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
#0 1.734 Reading package lists...
#0 3.716 W: GPG error: http://repo.mysql.com/apt/ubuntu trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
#0 3.716 E: The repository 'http://repo.mysql.com/apt/ubuntu trusty InRelease' is not signed.

---

failed to solve: executor failed running [/bin/sh -c apt-get update]: exit code: 100
`

[webdesign2be]

@burakoslu24 had the same error.
Adding RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29
to /docker_matecat/MateCat-Bionic/MySQL/DockerFile before RUN apt-get update solves this problem for me.