Cfrgtkky

When I attempt to install mongodb using the instructions on https://docs.mongodb.com/getting-started/shell/tutorial/install-mongodb-on-ubuntu/ on 16.04 I get the following result on the install step:

jonathan@poseidon:~$ sudo apt-get install mongodb-org

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Package mongodb-org is not available, but is referred to by another package.

This may mean that the package is missing, has been obsoleted, or

is only available from another source



E: Package 'mongodb-org' has no installation candidate

I checked the HTTP traffic with Wireshark and found that the only traffic was a HTTP GET for the list and a HTTP 304 response which suggests that the problem lies in my local configuration files. My sources.list.d file contains the following entry:

mongodb-org-3.4.list

What do I need to do to continue to troubleshoot this problem?

EDIT:
I tried to do this again on a new install of 16.04 under VirtualBox. I retrieved the key, created the list file, and did sudo apt update with the following results:

jonathan@Ubuntu-16:~$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6

[sudo] password for jonathan: 

Executing: /tmp/tmp.uWYpRUWfjK/gpg.1.sh --keyserver

hkp://keyserver.ubuntu.com:80

--recv

0C49F3730359A14518585931BC711F9BA15703C6

gpg: requesting key A15703C6 from hkp server keyserver.ubuntu.com

gpg: key A15703C6: public key "MongoDB 3.4 Release Signing Key <packaging@mongodb.com>" imported

gpg: Total number processed: 1

gpg:               imported: 1  (RSA: 1)

jonathan@Ubuntu-16:~$ echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list

deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse

jonathan@Ubuntu-16:~$ sudo apt update

Ign:1 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 InRelease

Get:2 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release [3 462 B]

Hit:3 http://mx.archive.ubuntu.com/ubuntu xenial InRelease               

Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]                   

Get:5 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release.gpg [801 B]                      

Get:6 http://mx.archive.ubuntu.com/ubuntu xenial-updates InRelease [95.7 kB]           

Ign:5 http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release.gpg                       

Get:7 http://mx.archive.ubuntu.com/ubuntu xenial-backports InRelease [92.2 kB]                    

Reading package lists... Done      

W: GPG error: http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D68FA50FEA312927

E: The repository 'http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 Release' is not signed.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for repository creation and user configuration details.

jonathan@Ubuntu-16:~$ 

As you can see, the key retrieved was for Mongodb 3.4, not Mongodb 3.2 and this explains the GPG failure in apt update. Any one know where to get the correct key?

NOTE: These instructions are for MongoDB 3.2.

Let's redo the installation steps for MongoDB.

First, remove any existing repository file for MongoDB.

sudo rm /etc/apt/sources.list.d/mongodb*.list

Next, add the key: (without the key, the repository will not load)

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927

Now, create a new MongoDB repository list file:

sudo bash -c 'echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" > /etc/apt/sources.list.d/mongodb-org-3.2.list'

Complete the installation with update of repositories then install:

sudo apt update

sudo apt install mongodb-org

Ubuntu 18.04 and MongoDB 4.0

MongoDB 4.0 is shown as stable where 4.1 is as unstable at the moment.

First, remove MongoDB from previous if installed:

sudo apt remove --autoremove mongodb-org

Remove any mongodb repo list files:

sudo rm /etc/apt/sources.list.d/mongodb*.list

sudo apt update

Now, add the new key:

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv E52529D4

Add the new repository:

sudo bash -c 'echo "deb [arch=amd64] http://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" > /etc/apt/sources.list.d/mongodb-org-4.0.list'

Install MongoDB

sudo apt update

sudo apt install mongodb-org

Enable and start the mongod server service:

systemctl enable mongod.service

systemctl start mongod.service

Check your installation:

~$ mongo --version

MongoDB shell version v4.0.3

git version: 7ea530946fa7880364d88c8d8b6026bbc9ffa48c

OpenSSL version: OpenSSL 1.1.0g  2 Nov 2017

allocator: tcmalloc

modules: none

build environment:

    distmod: ubuntu1804

    distarch: x86_64

    target_arch: x86_64

You can also check your service has started:

~$ systemctl status mongod.service

● mongod.service - MongoDB Database Server

   Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: e

   Active: active (running) since Sun 2018-10-07 12:33:46 MDT; 2min 34s ago

     Docs: https://docs.mongodb.org/manual

 Main PID: 5573 (mongod)

   CGroup: /system.slice/mongod.service

           └─5573 /usr/bin/mongod --config /etc/mongod.conf

Hope this helps!

In addition to @Terrance 's answer, here is how you can find appropriate sig key. Example is applicable to mongodb in this case but can be used for any other package similarly. Before you execute lines from @Terrance 's answer:

1. Go to ubuntu key server to find actual key




2. Search for string of interest (mongodb in case) and submit that first form (you don't need second form for this) - click Search! button

3. On provided search list seek for your version (it was 3.4 in my case here in example)

4. You can see two rows with keys there. Focus on most actual by date. First string is date created while second one is date valid due.




5. Use sig from row mentioned in point 5 - in case from picture it would be A15703C6




6. Continue with Terrance 's answer wether you need to install package or upgrade like myself

Nothing worked for me either, so I went to the mogodb website and followed these instructions to install from tarball:

Install dependencies:

sudo apt-get install libcurl3 openssl

Download the tarball from this page

cd to the Downloads directory or wherever the file went, and extract it:

tar -zxvf mongodb-linux-*-4.0.1.tgz

The binaries are in the bin directory of the extracted structure. You can add this directory to PATH or copy the files to /usr/local/bin or another PATH location.