upgrading a 1.8.1 couchbase server ubuntu installation might fail to upgrade/migrate the data due to missing openssl dependency

Aleksey Kondratenko added a comment - 02/Mar/12 11:54 AM this is suboptimal but not as bad as may seem. Just like Debian they have old libssl installable. http://packages.ubuntu.com/oneiric/libssl0.9.8

Sergey Avseyev added a comment - 02/Mar/12 1:04 PM yes, but in case of Debian, it doesn't allow to install both versions (at least on mine)

Sergey Avseyev added a comment - 02/Mar/12 1:12 PM Thanks, Aliaksey. it's possible to install both versions of libssl

Matt Ingenthron added a comment - 02/Mar/12 1:32 PM Should we really call this fixed? It was "won't fix" for 1.8.0. We have a workaround, but it's still not pretty and will affect more users as time goes on. Reopening since the larger question needs to be addressed at some point, and hopefully before 2.0.

Sergey Avseyev added a comment - 02/Mar/12 1:34 PM Ok, I just wanted to say it is works for me :)

Farshid Ghods added a comment - 06/Mar/12 11:53 AM 1.8.0 release does not depend on openssl anymore so the status is "fixed" there. for 2.0 we depend on openssl and build machine is 10.04 which means it builds on top of openssl 0.998 but ubuntu oneiric ships opensll 1.0.0. to fix this problem 1- we have to build on ubuntu 10 and ubuntu 11 separately and have seperate deb packages for them 2- build openssl as part of our packaging system which if i recall we can't do that due to some export issues with openssl so to install couchbase server on ubuntu 11 or 12 the user has to install the right openssl version

Farshid Ghods added a comment - 06/Mar/12 12:00 PM let's choose between the two options listed in the last comment

Dipti Borkar added a comment - 03/Aug/12 6:48 PM option 1 is the way to go.

Andrei Baranouski added a comment - 11/Oct/12 9:34 AM build 1837, ubuntu12.04 amazon instance:  openssl version OpenSSL 1.0.1 14 Mar 2012 2012-10-11 16:30:41,087 - root - INFO - running command.raw sudo dpkg -i /tmp/couchbase-server-enterprise_x86_64_2.0.0-1823-rel.deb 2012-10-11 16:30:41,256 - paramiko.transport - INFO - Secsh channel 37 opened. 2012-10-11 16:30:41,301 - paramiko.transport.sftp - INFO - [chan 23] Opened sftp connection (server version 3) 2012-10-11 16:30:44,153 - paramiko.transport - INFO - Secsh channel 24 opened. 2012-10-11 16:30:44,294 - root - INFO - running command.raw sudo cat /proc/cpuinfo 2012-10-11 16:30:44,576 - paramiko.transport - INFO - Secsh channel 25 opened. 2012-10-11 16:30:44,869 - root - INFO - command executed successfully 2012-10-11 16:30:44,869 - root - INFO - running command.raw sudo df -Th 2012-10-11 16:30:45,152 - paramiko.transport - INFO - Secsh channel 26 opened. 2012-10-11 16:30:45,444 - root - INFO - command executed successfully 2012-10-11 16:30:45,444 - root - INFO - running command.raw sudo cat /proc/meminfo 2012-10-11 16:30:45,732 - paramiko.transport - INFO - Secsh channel 27 opened. 2012-10-11 16:30:46,020 - root - INFO - command executed successfully 2012-10-11 16:30:46,020 - root - INFO - running command.raw hostname 2012-10-11 16:30:46,306 - paramiko.transport - INFO - Secsh channel 28 opened. 2012-10-11 16:30:46,586 - root - INFO - command executed successfully 2012-10-11 16:30:46,587 - root - INFO - running command.raw sudo /sbin/iptables -t nat -F 2012-10-11 16:30:46,867 - paramiko.transport - INFO - Secsh channel 29 opened. 2012-10-11 16:30:47,161 - root - INFO - command executed successfully 2012-10-11 16:30:47,441 - paramiko.transport - INFO - Secsh channel 30 opened. 2012-10-11 16:30:47,717 - paramiko.transport.sftp - INFO - [chan 30] Opened sftp connection (server version 3) 2012-10-11 16:30:47,963 - root - INFO - command executed successfully 2012-10-11 16:30:47,964 - root - INFO - * Failed to start couchbase-server 2012-10-11 16:30:47,964 - root - INFO - wait 5 seconds for membase server to start 2012-10-11 16:30:48,208 - paramiko.transport.sftp - INFO - [chan 30] sftp session closed. 2012-10-11 16:30:48,450 - paramiko.transport - INFO - Secsh channel 31 opened. 2012-10-11 16:30:48,725 - paramiko.transport.sftp - INFO - [chan 31] Opened sftp connection (server version 3) 2012-10-11 16:30:50,498 - root - INFO - command executed successfully  sudo /etc/init.d/couchbase-server start  * Failed to start couchbase-server $ sudo ./couchbase-server start The maximum number of open files for the couchbase user is set too low. It must be at least 10240. Normally this can be increased by adding the following lines to /etc/security/limits.conf: couchbase soft nofile <value> couchbase hard nofile <value> Where <value> is greater than 10240. Erlang R14B04 (erts-5.8.5) [source] [64-bit] [smp:2:2] [rq:2] [async-threads:16] [kernel-poll:true] Eshell V5.8.5 (abort with ^G) 1> {error_logger,{{2012,10,11},{14,3,19}},"Unable to load crypto library. Failed with error:~n\"~p, ~s\"~nOpenSSL might not be installed on this system.~n",[load_failed,"Failed to load NIF library /opt/couchbase/lib/erlang/lib/crypto-2.0.4/priv/lib/crypto: 'libcrypto.so.0.9.8: cannot open shared object file: No such file or directory'"]} {error_logger,{{2012,10,11},{14,3,19}},crash_report,[[{initial_call,{lhttpc_manager,init,['Argument__1']}},{pid,<0.193.0>},{registered_name,[]},{error_info,{exit,{undef,[{crypto,rand_bytes,"�"},{lhttpc_manager,init,1},{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]},[{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}},{ancestors,[lhttpc_sup,<0.191.0>]},{messages,[]},{links,[<0.192.0>]},{dictionary,[]},{trap_exit,false},{status,running},{heap_size,610},{stack_size,24},{reductions,153}],[]]} {error_logger,{{2012,10,11},{14,3,19}},"The on_load function for module ~s returned ~P\n",[crypto,{error,{load_failed,"Failed to load NIF library /opt/couchbase/lib/erlang/lib/crypto-2.0.4/priv/lib/crypto: 'libcrypto.so.0.9.8: cannot open shared object file: No such file or directory'"}},10]} {error_logger,{{2012,10,11},{14,3,19}},supervisor_report,[{supervisor,{local,lhttpc_sup}},{errorContext,start_error},{reason,{undef,[{crypto,rand_bytes,"�"},{lhttpc_manager,init,1},{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}},{offender,[{pid,undefined},{name,lhttpc_manager},{mfargs,{lhttpc_manager,start_link,[[{name,lhttpc_manager}]]}},{restart_type,permanent},{shutdown,10000},{child_type,worker}]}]} {error_logger,{{2012,10,11},{14,3,19}},std_info,[{application,lhttpc},{exited,{shutdown,{lhttpc,start,[normal,nil]}}},{type,temporary}]} {error_logger,{{2012,10,11},{14,3,19}},supervisor_report,[{supervisor,{local,cb_couch_sup}},{errorContext,start_error},{reason,{app_would_not_start,lhttpc}},{offender,[{pid,undefined},{name,couch_app},{mfargs,{couch_app,start,[fake,["/opt/couchbase/etc/couchdb/default.ini","/opt/couchbase/etc/couchdb/local.ini"]]}},{restart_type,permanent},{shutdown,5000},{child_type,supervisor}]}]} {error_logger,{{2012,10,11},{14,3,19}},supervisor_report,[{supervisor,{local,ns_server_cluster_sup}},{errorContext,start_error},{reason,shutdown},{offender,[{pid,undefined},{name,cb_couch_sup},{mfargs,{cb_couch_sup,start_link,[]}},{restart_type,permanent},{shutdown,5000},{child_type,supervisor}]}]} {error_logger,{{2012,10,11},{14,3,19}},std_info,[{application,ns_server},{exited,{shutdown,{ns_server,start,[normal,[]]}}},{type,temporary}]} {"init terminating in do_boot",{{badmatch,{error,{shutdown,{ns_server,start,[normal,[]]}}}},[{init,start_it,1},{init,start_em,1}]}} /opt/couchbase/lib/erlang/lib/os_mon-2.2.7/priv/bin/memsup: Erlang has closed.                                                                                Erlang has closed Crash dump was written to: erl_crash.dump.10-11-2012-14:03:17.6984

Farshid Ghods added a comment - 11/Oct/12 12:06 PM Andrei i have tried installing couchbase on ubuntu 12.04.1 and it failed to install dpkg: dependency problems prevent configuration of couchbase-server:  couchbase-server depends on libssl0.9.8 (>= 0.9.8k-1); however:   Package libssl0.9.8 is not installed. dpkg: error processing couchbase-server (--install):  dependency problems - leaving unconfigured Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.2.0-29-virtual Processing triggers for ureadahead ... Errors were encountered while processing:  couchbase-server ubuntu@domU-12-31-39-14-FA-39 :~$ ^C ubuntu@domU-12-31-39-14-FA-39 :~$ cat /etc/issue Ubuntu 12.04.1 LTS \n \l

Pavel Paulau added a comment - 11/Oct/12 1:44 PM In fact Ubuntu 12.04 allows you to install both 1.0 and 0.9.8, just: apt-get install libssl0.9.8 $ grep -v "#" /etc/apt/sources.list deb http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise main deb-src http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise main deb http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise-updates main deb-src http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise-updates main deb http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise universe deb-src http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise universe deb http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise-updates universe deb-src http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ precise-updates universe deb http://security.ubuntu.com/ubuntu precise-security main deb-src http://security.ubuntu.com/ubuntu precise-security main deb http://security.ubuntu.com/ubuntu precise-security universe deb-src http://security.ubuntu.com/ubuntu precise-security universe $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04.1 LTS Release: 12.04 Codename: precise It looks like documentation problem because we don't warn users about this dependency. And apparently CentOS 6.x users by default don't have openssl installed: $ rpm -i couchbase-server-enterprise_x86_64_2.0.0-1723-rel.rpm error: Failed dependencies: libcrypto.so.6()(64bit) is needed by couchbase-server-2.0.0-1723.x86_64 libssl.so.6()(64bit) is needed by couchbase-server-2.0.0-1723.x86_64 And this helps: $ yum install openssl098e

Matt Ingenthron added a comment - 11/Oct/12 2:31 PM Just checking, but the reason for doing packages is so you can describe dependencies, right? This shouldn't be a documentation level issue-- our package should describe these dependencies and thus people won't have DOA servers because they've neglected to install dependencies. Also note that if we were using repositories, dependencies would be automatically resolved.

Pavel Paulau added a comment - 11/Oct/12 3:27 PM If nobody is *really* fixing this package issue before 2.0 release (options 1 or 2, whatever), it sounds like documentation issue to me. It shouldn't be, but it is. I don't know, probably we have a plan to fix that. In this case please assign the bug to right person.

Steve Yen added a comment - 11/Oct/12 7:49 PM assigning to dipti to make the platform support decision, and whether this is testable in 2.0 timeframe, etc.

Farshid Ghods added a comment - 15/Oct/12 7:58 PM so Matt is right , the 1.8.0 and 1.8.1 users which upgrade to 2.0 will hit this issue because of openssl dependency. with proper documentation we will notify the users about this requirement. one thing it would be nice to fix is not starting any of the pre or post installation scripts if this situation exists.

Pavel Paulau added a comment - 17/Oct/12 7:24 PM Just a small clarification: "1.8.0 and 1.8.1 users which upgrade to 2.0 will hit this issue" only on CentOS 6.x and Ubuntu 12.04.

Pavel Paulau added a comment - 17/Oct/12 9:40 PM Actually we have that metadata in our package, for instance: $ dpkg --info couchbase-server-enterprise_x86_64_2.0.0-1861-rel.deb ... Depends: libc6 (>= 2.11), libgcc1 (>= 1:4.1.1), libncurses5 (>= 5.6+20071006-3), libssl0.9.8 (>= 0.9.8k-1), libstdc++6 (>= 4.4.0), zlib1g (>= 1:1.1.4), lsb-base (>= 3.2) ... And bug summary is incorrect, installation doesn't succeed:     dependency problems - leaving unconfigured $ dpkg -l couchbase-server ... iU couchbase-server 2.0.0 Couchbase Server In means that only unpack phase passed. As far as I know dpkg doesn't have dependency support. Package manager triggers couchbase setup if user manually install missing package. And only then upgrade happens. Smarter package managers work as expected: $ gdebi --q couchbase-server-enterprise_x86_64_2.0.0-1861-rel.deb Requires the installation of the following packages: libssl0.9.8 Couchbase Server  Couchbase Server is the leading distribution of memcached and  couchbase, created and supported by top contributors to the memcached  and couchbase open source projects. Do you want to install the software package? [y/N]:y Fetched 0 B in 0s (0 B/s) Preconfiguring packages ... Preconfiguring packages ... Selecting previously unselected package libssl0.9.8. (Reading database ... 40101 files and directories currently installed.) Unpacking libssl0.9.8 (from .../libssl0.9.8_0.9.8o-7ubuntu3.1_amd64.deb) ... Setting up libssl0.9.8 (0.9.8o-7ubuntu3.1) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place Selecting previously unselected package couchbase-server. (Reading database ... 40125 files and directories currently installed.) Unpacking couchbase-server (from couchbase-server-enterprise_x86_64_2.0.0-1861-rel.deb) ... Setting up couchbase-server (2.0.0) ...  * Started couchbase-server ....

Farshid Ghods added a comment - 18/Oct/12 12:34 PM when you run dpkg -i on ubuntu or rpm -U centos that does not have libssl098 1- does the installer stop the couchbase-server 1.8.x instance that is running 2- does it extract/overwrite the files before failing due to dependency error ?

Pavel Paulau added a comment - 18/Oct/12 1:12 PM On ubuntu 12.04: 1. Installer stops 1.8.1 instance 2. Installer extracts files before failure. This is how dpkg works. 3. upgrade happens only if users run something like this "sudo apt-get install -f"

Farshid Ghods added a comment - 18/Oct/12 1:18 PM i see. so in that case the user 1.8.1 installation is going to be unusable and they can't use their cluster after this uness they install libssl. also does the upgrade process migrate the data ad then it fails ?

Pavel Paulau added a comment - 18/Oct/12 1:24 PM As I mentioned before upgrade doesn't start unless you install missing dependencies. And then it succeed.

Pavel Paulau added a comment - 18/Oct/12 1:36 PM Can we force users to run:     yum install couchbase-server-enterprise_x86_64_2.0.0-1868-rel.rpm and     gdebi couchbase-server-enterprise_x86_64_2.0.0-1868-rel.deb Why do we suggest to use dpkg and rpm?

Pavel Paulau added a comment - 18/Oct/12 3:32 PM As per discussion with Farshid we should recommend our users/customers to use gdebi and yum instead of dpkg and rpm. So, it's probably documentation issue again.)

Matt Ingenthron added a comment - 18/Oct/12 4:04 PM First, I should note that previously (as discussed on this issue) the ssl deps had been removed. If they've been re-added, that's great. Back before I filed this issue, I'd looked into this and the problem is that at least gdebi is not included in distributions by default. That means the first step would have to be apt-get install gdebi (which, for ubuntu 11.x at least seems to come from universe) then gdebi install the couchbase .deb. It's unfortunate, but there is no OOTB tool that handles dependency resolution from a .deb. Other alternatives we'd discussed included bundling a script that would do things on the user's behalf. Or, I think one better is that we distribute a package that adds a repo we manage, so it'd be dpkg -i, followed by apt-get install. The benefit here is that they can also obtain other tools like libcouchbase and the cbc tools through this repository. Downside is our packages aren't versioned so an upgrade of a package could break things. Dipti needs to make the call since it's a user experience issue and timeframe. She did, back in August. My main advice here would be to do whatever the platform advises. I feel like we're fighting the platform at the moment, and thus we're running into problems that it has solved.

Pavel Paulau added a comment - 18/Oct/12 4:57 PM On my mind, the best option for 2.0 is "apt-get install gdebi; gdebi install couchbase..." and "yum install couchbase..." For post 2.0 releases we should finally switch to own repository as Matt suggests, except maybe I'd prefer something like this:     add-apt-repository ....     apt-get update     apt-get install couchbase... btw, how do you distribute libcouchbase and other tools?

Matt Ingenthron added a comment - 18/Oct/12 6:05 PM libcouchbase is through a repository, though we also provide a download of a tarball. We try to do whatever is most common or the platform recommends for the given target, plus a download of an archive. Java => Maven .NET => NuGet PHP => right now, a download. plans to get it in PECL Ruby => Gem C => yum on rpm, apt-get on deb, homebrew on Mac OS (and eventually .zip file for Windows) Python => pypi (needs updates)

Steve Yen added a comment - 18/Oct/12 6:08 PM need resolution and cost to fix in a day

Steve Yen added a comment - 18/Oct/12 7:00 PM Spoke with Pavel on this. So, re-summarizing this: given a system that does not have the right openssl 0.9.8 pre-installed, when one runs...     dpkg -i couchbase-2.0.deb then... - server is stopped, - files are unpacked (already placed into /opt/couchbase) - then the dpkg tool detects the missing dependency in the pre-installation script - then the server is in a state where 1.8.1 will not run (it's no longer installed) and 2.0 will not run (it's never been installed) - but, the user's data/db files are still there Pavel reports that updating the debian package control file with explicitly listed libssl 0.9.8 dependency does not help with dpkg -i.

Matt Ingenthron added a comment - 18/Oct/12 7:11 PM All true. I just want to add that removing the dependency from the package metadata would have us in a worse state. It'd try to start and crash, I believe. This may be far too late to mention this, but I should also note that doing data migration at the time of package installation is usually not recommended in most packaging guides. Perhaps we don't actually do that though-- I'm not sure. One other possible option to investigate: remove the SSL feature from whatever is linking against it? We don't use it to my knowledge.

Farshid Ghods added a comment - 18/Oct/12 7:14 PM ssl is used in couple of places mentioned here http://www.couchbase.com/issues/browse/MB-6883

Pavel Paulau added a comment - 18/Oct/12 7:35 PM On more note. In case of own repository users cannot download *.deb or *.rpm and fail because there is no more download links. You force users and customers to follow new installation steps as it's the only way to get Couchbase 2.0.

Steve Yen added a comment - 18/Oct/12 7:45 PM Bin's going to try out centos 6 steps and will report soon (after grabbing a centos 6 VM from farshid/ray)

Steve Yen added a comment - 18/Oct/12 7:58 PM Pavel got there first. On centos 6, he reports that rpm -i fails early due to early dependency checking. That is, if the user has an already-installed and already-running 1.8.1 server, with lots of items in their database, and the user does not have openssl098 install already... Next, running...   rpm -i couchbase-*2.0.0*.rpm Will fail with...   error: Failed dependencies:   libcrypto.so.6()(64bit) is needed by couchbase-server-2.0.0-1723.x86_64   libssl.so.6()(64bit) is needed by couchbase-server-2.0.0-1723.x86_64 And, the 1.8.1 server is still running, 1.8.1 program files and database data files are left untouched. The fix at this point is to run...   yum install openssl098e Then the next "rpm -i" attempt should work correctly. (As an aside, the decision that rpm -i and dpkg -U should _upgrade_ data was a PM decision, and they incorporated into their decision all the developer/engineering feedback that this is an unexpected, surprising, unnatural approach for databases.)

Steve Yen added a comment - 19/Oct/12 12:27 AM Pavel, On ubuntu, some ideas / options for a fix (some of them quite ugly)... 1) - Release two packages, one for 12.04, another for 10.04. On this, Pavel reports that he tried compiling everything on 12.04, but the resulting package still depended on the old libssl. (Pavel, if I misunderstood this, please chime in.) 2) - Have a *.deb that's an envelope for another *.deb. The outer, envelope *.deb first checks for critical dependencies before invoking the real *.deb package. (Did I mention "ugly"?) 3) - Have the 'preinst upgrade' script check for critical dependencies and error with an actionable error message that tells the user what to do (e.g., "the upgrade failed because of blah blah. to fix this, please run apt-get install libsslfoobar". There might be possibility that 1.8.1 program files might be already removed at this point, but I don't think that's confirmed. Pavel, can you check #3? Based on the debian packaging FAQ... http://www.debian.org/doc/manuals/debian-faq/ch-pkg_basics.en.html     preinst     This script executes before that package will be unpacked from its Debian archive (".deb") file.     Many 'preinst' scripts stop services for packages which are being upgraded until their     installation or upgrade is completed (following the successful execution of the 'postinst' script). ...I get the impression that perhaps the preinst can abort the upgrade without too much damage. Please see the 'preinst upgrade' state transition graph here, where I do see a pathway where 1.8.1 is left untouched as "installed" (but perhaps not running)...      http://wiki.debian.org/MaintainerScripts

Steve Yen added a comment - 19/Oct/12 12:38 AM Bin, Actually, instead of Pavel (who has many high priority tasks at the moment), can you lend a hand in this one? Please see my immediately previous comment? Perhaps you can even borrow Pavel's VM's if he has some ready-to-go? Thanks, Steve

Pavel Paulau added a comment - 19/Oct/12 12:45 AM Actually I used ec2 instance for ubuntu 12.04. Anyway, it could save your time.

Farshid Ghods added a comment - 19/Oct/12 11:08 AM - edited to summarize : this issue needs to be addressed only for ubuntu 12. for centos 6 use case installer will not start the upgrade process at all ( no overwriting files or data migration ) . it will fail to install without even stopping the existing couchbase installation

Bin Cui added a comment - 22/Oct/12 1:56 PM http://review.couchbase.org/#/c/21842/ $ sudo dpkg -i couchbase-server_2.0.0_amd64.deb (Reading database ... 62363 files and directories currently installed.) Preparing to replace couchbase-server 1.8.1 (using couchbase-server_2.0.0_amd64. deb) ... =INFO REPORT==== 22-Oct-2012::11:34:05 === Initiated server shutdown** at node ns_1@127.0.0.1 ** =INFO REPORT==== 22-Oct-2012::11:34:11 === Stopped ns_server application** at node ns_1@127.0.0.1 **  * Stopped couchbase-server Upgrading cannot proceed before the package 'libssl0.9.8' is installed. Please run apt-get to install libssl0.9.8 dpkg: error processing couchbase-server_2.0.0_amd64.deb (--install):  subprocess new pre-installation script returned error exit status 1 Errors were encountered while processing:  couchbase-server_2.0.0_amd64.deb $ sudo /etc/init.d/couchbase-server start  * Started couchbase-server

Pavel Paulau added a comment - 29/Oct/12 3:41 PM Notice that installer warns users about dependency issue only in case of upgrade. Otherwise users still get all these unclear errors.

MC Brown added a comment - 05/Nov/12 11:08 AM What needs to be documented here? Are we going to recommend users install openssl 0.9.8 when the installation says it is required? MC

Farshid Ghods added a comment - 05/Nov/12 11:12 AM yes. also for users who are trying to install 2.0 for the first time we need to have this in documentation and the website as well http://www.couchbase.com/issues/browse/MB-6971

Bin Cui added a comment - 05/Nov/12 11:13 AM When installer detects that libssl0.9.8 doesn't exist during fresh installation or upgrade, it will stop installation and give instructions to install the missing libssl0.9.8. And it will be helpful to put it as a prerequisite for ubuntu 12.0 setup.

Andrei Baranouski added a comment - 03/Dec/12 10:45 AM should user restart manually server after upgrade was stopped? ubuntu@ip-10-39-13-185 :/tmp$ sudo dpkg -i couchbase-server-community_x86_64_2.0.0-1971-rel.deb (Reading database ... 31678 files and directories currently installed.) Preparing to replace couchbase-server 1.8.1 (using couchbase-server-community_x86_64_2.0.0-1971-rel.deb) ... =INFO REPORT==== 3-Dec-2012::15:56:42 === Initiated server shutdown** at node ns_1@127.0.0.1 ** =INFO REPORT==== 3-Dec-2012::15:56:48 === Stopped ns_server application** at node ns_1@127.0.0.1 **  * Stopped couchbase-server No packages found matching libssl0.9.8. Installing cannot proceed since the package 'libssl0.9.8' is missing. Please install libssl0.9.8 and try again. $sudo apt-get install libssl0.9.8 You can also restart couchbase as follows: $sudo /etc/init.d/couchbase-server start dpkg: error processing couchbase-server-community_x86_64_2.0.0-1971-rel.deb (--install):  subprocess new pre-installation script returned error exit status 1 Errors were encountered while processing:  couchbase-server-community_x86_64_2.0.0-1971-rel.deb ubuntu@ip-10-39-13-185 :/tmp$ ps -ef| grep couchbase ubuntu 3687 3502 0 16:41 pts/1 00:00:00 grep --color=auto couchbase ubuntu@ip-10-39-13-185 :/tmp$ ^C ubuntu@ip-10-39-13-185 :/tmp$ sudo /etc/init.d/couchbase-server start  * Started couchbase-server