# Unable to install XtraDBCluster on a server where Percona Server for MySQL is running **URL:** \ **Category:** Percona XtraDB Cluster 5.x\ **Created:** [June 12, 2018, 11:09am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410 "2018-06-12T11:09:34Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![percona\_user\_1981](https://avatars.discourse-cdn.com/v4/letter/p/ba8739/32.png) [@percona\_user\_1981](https://forums.percona.com/u/percona_user_1981)\ **Post date:** [June 12, 2018, 11:09am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/1 "2018-06-12T11:09:34Z")
I have Percona Sever for MySQL 5.7 installed in my linux server. When i install XtraDBCluster 5.7 in my server. I get the following error (highlighted in red). Based on the error message I see that there are conflicting files between the percona-xtradb-cluster-server and percona-server-common. I tried uninstalling the percona-server-common files and then installling the xtradb-cluster. The installation is successful but the percona mysql server doesn’t come up when I try to bootstrap the server. How do I resolve this issue? OS: Ubuntu TLS 16.04 Server: AWS EC2 instances ## [I]$ sudo apt-get install percona-xtradb-cluster-57 [sudo] password for indiadev: Reading package lists… Done Building dependency tree Reading state information… Done The following packages were automatically installed and are no longer required: libboost-program-options1.58.0 percona-server-common-5.7 percona-xtradb-cluster-garbd-5.7 percona-xtradb-cluster-garbd-debug-5.7 Use ‘sudo apt autoremove’ to remove them. The following additional packages will be installed: percona-xtradb-cluster-client-5.7 percona-xtradb-cluster-common-5.7 percona-xtradb-cluster-server-5.7 Suggested packages: tinyca The following packages will be REMOVED: percona-server-client-5.7 percona-server-server-5.7 The following NEW packages will be installed: percona-xtradb-cluster-57 percona-xtradb-cluster-client-5.7 percona-xtradb-cluster-common-5.7 percona-xtradb-cluster-server-5.7 0 upgraded, 4 newly installed, 2 to remove and 7 not upgraded. Need to get 0 B/12.5 MB of archives. After this operation, 71.3 MB disk space will be freed. Do you want to continue? [Y/n] y Preconfiguring packages … (Reading database … 84071 files and directories currently installed.) Removing percona-server-server-5.7 (5.7.22-22-1.xenial) … Removing percona-server-client-5.7 (5.7.22-22-1.xenial) … Processing triggers for man-db (2.7.5-1) … Selecting previously unselected package percona-xtradb-cluster-common-5.7. (Reading database … 83904 files and directories currently installed.) Preparing to unpack …/percona-xtradb-cluster-common-5.7\_5.7.21-29.26-1.xenial\_amd64.deb … Unpacking percona-xtradb-cluster-common-5.7 (5.7.21-29.26-1.xenial) … Selecting previously unselected package percona-xtradb-cluster-client-5.7. Preparing to unpack …/percona-xtradb-cluster-client-5.7\_5.7.21-29.26-1.xenial\_amd64.deb … Unpacking percona-xtradb-cluster-client-5.7 (5.7.21-29.26-1.xenial) … Setting up percona-xtradb-cluster-common-5.7 (5.7.21-29.26-1.xenial) … dpkg-query: no path found matching pattern /etc/mysql/my.cnf - The suggested mysql options and settings are in /etc/mysql/percona-server.conf.d/mysqld.cnf - If you want to use mysqld.cnf as default configuration file please make backup of /etc/my.cnf - Once it is done please execute the following commands: rm -rf /etc/mysql/my.cnf update-alternatives --install /etc/mysql/my.cnf my.cnf “/etc/mysql/percona-xtradb-cluster.cnf” 200 * * * Selecting previously unselected package percona-xtradb-cluster-server-5.7. (Reading database … 83933 files and directories currently installed.) Preparing to unpack …/percona-xtradb-cluster-server-5.7\_5.7.21-29.26-1.xenial\_amd64.deb … …Unpacking percona-xtradb-cluster-server-5.7 (5.7.21-29.26-1.xenial) … [COLOR=#FF0000]dpkg: error processing archive /var/cache/apt/archives/percona-xtradb-cluster-server-5.7\_5.7.21-29.26-1.xenial\_amd64.deb (–unpack): trying to overwrite ‘/usr/share/mysql/danish/errmsg.sys’, which is also in package percona-server-common-5.7 5.7.22-22-1.xenial dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Selecting previously unselected package percona-xtradb-cluster-57. Preparing to unpack …/percona-xtradb-cluster-57\_5.7.21-29.26-1.xenial\_amd64.deb … Unpacking percona-xtradb-cluster-57 (5.7.21-29.26-1.xenial) … Processing triggers for man-db (2.7.5-1) … Errors were encountered while processing: /var/cache/apt/archives/percona-xtradb-cluster-server-5.7\_5.7.21-29.26-1.xenial\_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1)[/I] ---
**Author:** ![phoenix](https://avatars.discourse-cdn.com/v4/letter/p/0ea827/32.png) [@phoenix](https://forums.percona.com/u/phoenix)\ **Post date:** [June 12, 2018, 11:27am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/2 "2018-06-12T11:27:42Z")
You can’t install Percona Server for MySQL and Percona-XtraDB-Cluster on the same server, you either have one or the other. What were you trying to achieve? ---
**Author:** ![percona\_user\_1981](https://avatars.discourse-cdn.com/v4/letter/p/ba8739/32.png) [@percona\_user\_1981](https://forums.percona.com/u/percona_user_1981)\ **Post date:** [June 13, 2018, 3:49am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/3 "2018-06-13T03:49:06Z")
We are migrating away from Maria DB (AWS). As a first step we set up the Percona MySQL Server and imported the data. Next we are trying to set up the XtraDBClustering. The documentation says that we should have a MySQL instance in place before setting up the XtraDB cluster. ---
**Author:** ![lorraine.pocklington](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/lorraine.pocklington/32/37_2.png) [@lorraine.pocklington](https://forums.percona.com/u/lorraine.pocklington)\ **Post date:** [June 13, 2018, 4:14am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/4 "2018-06-13T04:14:38Z")
Hey there [percona\_user\_1981](https://www.percona.com/forums/member/42089-percona_user_1981) let me see if I can get someone from the team to get you on the right track. Bear with me? Thanks! ---
**Author:** ![hrvojem](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hrvojem/32/6_2.png) [@hrvojem](https://forums.percona.com/u/hrvojem)\ **Post date:** [June 13, 2018, 4:24am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/5 "2018-06-13T04:24:31Z")
Hi You mention that: > [@](#): > > The installation is successful but the percona mysql server doesn’t come up when I try to bootstrap the server. How do I resolve this issue? Do you mean the installation of percona-xtradb-cluster or percona-server packages? As mentioned by [phoenix](https://www.percona.com/forums/member/40023-phoenix) you’ll need to remove Percona Server packages before installing Percona XtraDB Cluster. In case you successfully installed PXC and the issue is bootstrapping, error log should provide details of why it’s failing. Can you please share it here. – Hrvoje ---
**Author:** ![percona\_user\_1981](https://avatars.discourse-cdn.com/v4/letter/p/ba8739/32.png) [@percona\_user\_1981](https://forums.percona.com/u/percona_user_1981)\ **Post date:** [June 13, 2018, 9:46am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/6 "2018-06-13T09:46:07Z")
@[hrvojem](https://www.percona.com/forums/member/2348-hrvojem) What i meant was I am able to install only if i remove the conflicting percona my sql server package. I don’t see a error message in the shell nor do i see it in the error log. I have given the commands I used and please see the output. Note, when I installed XtraDBCluster, it didn’t ask for a root password to be set for the database. Test-Mysql-cluster-01:~/percona$ sudo service mysql start Failed to start mysql.service: Unit mysql.service is masked. Test-Mysql-cluster-01:~/percona$ sudo /etc/init.d/mysql Test-Mysql-cluster-01:~/percona$ date Wed Jun 13 14:28:21 UTC 2018 Test-Mysql-cluster-01:~/percona$ sudo /etc/init.d/mysql Test-Mysql-cluster-01:~/percona$ sudo /etc/init.d/mysql bootstrap-pxc Test-Mysql-cluster-01:~/percona$ sudo service mysql status ● mysql.service Loaded: masked (/dev/null; bad) Active: inactive (dead) since Tue 2018-06-12 16:10:17 UTC; 22h ago Main PID: 63108 (code=exited, status=0/SUCCESS) Jun 12 14:11:44 Test-Mysql-cluster-01 systemd[1]: Starting Percona Server… Jun 12 14:12:02 Test-Mysql-cluster-01 systemd[1]: Started Percona Server. Jun 12 16:10:09 Test-Mysql-cluster-01 systemd[1]: Stopping Percona Server… Jun 12 16:10:17 Test-Mysql-cluster-01 systemd[1]: Stopped Percona Server. Jun 12 16:10:34 Test-Mysql-cluster-01 systemd[1]: Stopped mysql.service. Jun 13 14:22:40 Test-Mysql-cluster-01 systemd[1]: Stopped mysql.service. ---
**Author:** ![percona\_user\_1981](https://avatars.discourse-cdn.com/v4/letter/p/ba8739/32.png) [@percona\_user\_1981](https://forums.percona.com/u/percona_user_1981)\ **Post date:** [June 13, 2018, 8:55pm UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/7 "2018-06-13T20:55:58Z")
Any inputs on how to proceed further? Hope the steps that I am trying to take is correct Step 1: installed percona server for mysql Step 2: Imported mysql dump extracted from AWS Maria DB Step 3: Installation of XtraDB cluster on server 1 Step 4: Bootstrap the node 1 ---
**Author:** ![hrvojem](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hrvojem/32/6_2.png) [@hrvojem](https://forums.percona.com/u/hrvojem)\ **Post date:** [June 14, 2018, 5:43am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/8 "2018-06-14T05:43:54Z")
Can you point me to the docs that mention that Percona Server needs to be installed first when migrating? How did you import data (mysqldump)? Installing the PXC and then importing data should work (without installing Percona Server first). Please check the configuration file (defaults to: /etc/mysql/my.cnf) to see where the error log is (default should be: /var/log/mysql.log). Error log should provide more information on why it won’t bootstrap. My suggestion would be to first set up a cluster as described in the how-to: [https://www.percona.com/doc/percona-xtradb-cluster/5.7/howtos/ubuntu\_howto.html](https://www.percona.com/doc/percona-xtradb-cluster/5.7/howtos/ubuntu_howto.html) and then to import the data. > [@](#): > > Note, when I installed XtraDBCluster, it didn’t ask for a root password to be set for the database. This is because you’ve set it up when you installed Percona Server, and PXC uses the same (default) datadir. This means the password should be the same as one you entered when installing PS. – Hrvoje ---
**Author:** ![percona\_user\_1981](https://avatars.discourse-cdn.com/v4/letter/p/ba8739/32.png) [@percona\_user\_1981](https://forums.percona.com/u/percona_user_1981)\ **Post date:** [June 15, 2018, 4:35am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/9 "2018-06-15T04:35:37Z")
@[hrvojem](https://www.percona.com/forums/member/2348-hrvojem) Thank you for your response. I did like you said, removed all the installations and then installed only XtraDBCluster. The installation was successful. I did the same steps in node 2 and XtraDB cluster installation was successful. I bootstrapped node 1 - this step was successful I started node 2 and the node 2 joined the cluster and node 1 was preparing for data transfer to node 2. At this step, I see a failure that I am unable to resolve. Shared snippents from different log files below. Kindly let me know what could be going wrong Node 1 Donor’s innobackup.backup.log: [I]180615 09:22:07 Executing UNLOCK BINLOG 180615 09:22:07 Executing UNLOCK TABLES 180615 09:22:07 All tables unlocked 180615 09:22:07 [00] Streaming ib\_buffer\_pool to 180615 09:22:07 [00] …done 180615 09:22:07 Backup created in directory ‘/tmp/pxc\_sst\_YhU0/donor\_xb\_YwGx/’ MySQL binlog position: filename ‘Test-Mysql-cluster-01-bin.000005’, position ‘154’ 180615 09:22:07 [00] Streaming 180615 09:22:07 [00] …done 180615 09:22:07 [00] Streaming 180615 09:22:07 [00] …done xtrabackup: Transaction log of lsn (2558687) to (2558712) was copied. 09:22:07 UTC - xtrabackup got signal 11 ; This could be because you hit a bug or data is corrupted. This error can also be caused by malfunctioning hardware. Attempting to collect some information that could help diagnose the problem. As this is a crash and something is definitely wrong, the information collection process might fail. Thread pointer: 0x0 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong… stack\_bottom = 0 thread\_stack 0x10000 xtrabackup(my\_print\_stacktrace+0x3b)[0xd31ccb] xtrabackup(handle\_fatal\_signal+0x281)[0xaa0e31] /lib/x86\_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fd524a78390] xtrabackup(\_Z16os\_event\_destroyRP8os\_event+0x7)[0x8731a7] xtrabackup(\_Z11os\_aio\_freev+0x34)[0x8535f4] xtrabackup(\_Z19xb\_data\_files\_closev+0xd1)[0x6fba81] xtrabackup(\_Z22xtrabackup\_backup\_funcv+0x2446)[0x6ff436] xtrabackup(main+0x137a)[0x6e110a] /lib/x86\_64-linux-gnu/libc.so.6(\_\_libc\_start\_main+0xf0)[0x7fd522a2e830] xtrabackup(\_start+0x29)[0x6f5309] Please report a bug at [url][Log in - Percona JIRA](https://jira.percona.com/projects/PXB%5B/url%5D%5B/I%5D) Node 1 MySQL Error Log: 2018-06-15T09:21:52.726412Z 0 [Note] WSREP: Member 0.0 (rs-platform-db-node2) requested state transfer from ‘_any_’. Selected 1.0 (rs-platform-db-node1)(SYNCED) as donor. 2018-06-15T09:21:52.726441Z 0 [Note] WSREP: Shifting SYNCED → DONOR/DESYNCED (TO: 3) 2018-06-15T09:21:52.726532Z 6 [Note] WSREP: wsrep\_notify\_cmd is not defined, skipping notification. 2018-06-15T09:21:52.726695Z 0 [Note] WSREP: Initiating SST/IST transfer on DONOR side (wsrep\_sst\_xtrabackup-v2 --role ‘donor’ --address ‘172.17.117.22:4444/xtrabackup\_sst//1’ --socket ‘/var/run/mysqld/mysqld.sock’ --datadir ‘/var/lib/mysql/’ --defaults-file ‘/etc/mysql/my.cnf’ --defaults-group-suffix ‘’ ‘’ --gtid ‘13dbbb02-6fff-11e8-baa3-ca759da50a8b:3’) 2018-06-15T09:21:52.727185Z 6 [Note] WSREP: DONOR thread signaled with 0 encryption: using gcrypt 1.6.5 2018-06-15T09:21:54.683744Z 0 [Note] WSREP: (be775797, ‘tcp://0.0.0.0:4567’) turning message relay requesting off 2018-06-15T09:22:03.053771Z WSREP\_SST: [INFO] Streaming the backup to joiner at 172.17.117.22 4444 2018-06-15T09:22:07.414811Z 528 [Note] Aborted connection 528 to db: ‘unconnected’ user: ‘sstuser’ host: ‘localhost’ (Got an error reading communication packets) 2018-06-15T09:22:07.417226Z WSREP\_SST: [ERROR] \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* FATAL ERROR \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 2018-06-15T09:22:07.419154Z WSREP\_SST: [ERROR] xtrabackup finished with error: 2. Check /var/lib/mysql//innobackup.backup.log 2018-06-15T09:22:07.422709Z WSREP\_SST: [ERROR] \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 2018-06-15T09:22:07.425057Z WSREP\_SST: [ERROR] Cleanup after exit with status:22 2018-06-15T09:22:07.458112Z 0 [ERROR] WSREP: Process completed with error: wsrep\_sst\_xtrabackup-v2 --role ‘donor’ --address ‘172.17.117.22:4444/xtrabackup\_sst//1’ --socket ‘/var/run/mysqld/mysqld.sock’ --datadir ‘/var/lib/mysql/’ --defaults-file ‘/etc/mysql/my.cnf’ --defaults-group-suffix ‘’ ‘’ --gtid ‘13dbbb02-6fff-11e8-baa3-ca759da50a8b:3’: 22 (Invalid argument) 2018-06-15T09:22:07.458186Z 0 [ERROR] WSREP: Command did not run: wsrep\_sst\_xtrabackup-v2 --role ‘donor’ --address ‘172.17.117.22:4444/xtrabackup\_sst//1’ --socket ‘/var/run/mysqld/mysqld.sock’ --datadir ‘/var/lib/mysql/’ --defaults-file ‘/etc/mysql/my.cnf’ --defaults-group-suffix ‘’ ‘’ --gtid ‘13dbbb02-6fff-11e8-baa3-ca759da50a8b:3’ 2018-06-15T09:22:07.458634Z 0 [Warning] WSREP: 1.0 (rs-platform-db-node1): State transfer to 0.0 (rs-platform-db-node2) failed: -22 (Invalid argument) 2018-06-15T09:22:07.458659Z 0 [Note] WSREP: Shifting DONOR/DESYNCED → JOINED (TO: 3) 2018-06-15T09:22:07.458957Z 0 [Note] WSREP: Member 1.0 (rs-platform-db-node1) synced with group. 2018-06-15T09:22:07.458969Z 0 [Note] WSREP: Shifting JOINED → SYNCED (TO: 3) 2018-06-15T09:22:07.459042Z 2 [Note] WSREP: Synchronized with group, ready for connections 2018-06-15T09:22:07.459082Z 2 [Note] WSREP: Setting wsrep\_ready to true 2018-06-15T09:22:07.459093Z 2 [Note] WSREP: wsrep\_notify\_cmd is not defined, skipping notification. 2018-06-15T09:22:08.459403Z 0 [Note] WSREP: forgetting 895852b1 (tcp://172.17.117.22:4567) Node 2 MySQL Log: 2018-06-15T09:21:52.730176Z 0 [Note] WSREP: Member 0.0 (rs-platform-db-node2) requested state transfer from ‘_any_’. Selected 1.0 (rs-platform-db-node1)(SYNCED) as donor. 2018-06-15T09:21:52.730212Z 0 [Note] WSREP: Shifting PRIMARY → JOINER (TO: 3) 2018-06-15T09:21:52.730244Z 2 [Note] WSREP: Requesting state transfer: success, donor: 1 2018-06-15T09:21:52.730267Z 2 [Note] WSREP: GCache history reset: 00000000-0000-0000-0000-000000000000:0 → 13dbbb02-6fff-11e8-baa3-ca759da50a8b:3 2018-06-15T09:21:53.102382Z WSREP\_SST: [INFO] Proceeding with SST… encryption: using gcrypt 1.6.5 2018-06-15T09:21:54.732463Z 0 [Note] WSREP: (895852b1, ‘tcp://0.0.0.0:4567’) turning message relay requesting off 2018-06-15T09:21:56.171996Z WSREP\_SST: [INFO] …Waiting for SST streaming to complete! 2018-06-15T09:22:07.431719Z WSREP\_SST: [INFO] Preparing the backup at /var/lib/mysql//.sst 2018-06-15T09:22:07.462673Z 0 [Warning] WSREP: 1.0 (rs-platform-db-node1): State transfer to 0.0 (rs-platform-db-node2) failed: -22 (Invalid argument) 2018-06-15T09:22:07.462710Z 0 [ERROR] WSREP: gcs/src/gcs\_group.cpp:gcs\_group\_handle\_join\_msg():766: Will never receive state. Need to abort. 2018-06-15T09:22:07.462733Z 0 [Note] WSREP: gcomm: terminating thread 2018-06-15T09:22:07.462752Z 0 [Note] WSREP: gcomm: joining thread 2018-06-15T09:22:07.462814Z 0 [Note] WSREP: gcomm: closing backend 2018-06-15T09:22:10.734622Z 0 [Note] WSREP: (895852b1, ‘tcp://0.0.0.0:4567’) connection to peer be775797 with addr tcp://172.17.101.184:4567 timed out, no messages seen in PT3S (gmcast.peer\_timeout) 2018-06-15T09:22:10.734749Z 0 [Note] WSREP: (895852b1, ‘tcp://0.0.0.0:4567’) turning message relay requesting on, nonlive peers: tcp://172.17.101.184:4567 2018-06-15T09:22:12.234623Z 0 [Note] WSREP: (895852b1, ‘tcp://0.0.0.0:4567’) reconnecting to be775797 (tcp://172.17.101.184:4567), attempt 0 2018-06-15T09:22:12.962976Z 0 [Note] WSREP: declaring node with index 1 suspected, timeout PT5S (evs.suspect\_timeout) 2018-06-15T09:22:12.963018Z 0 [Note] WSREP: evs::proto(895852b1, LEAVING, view\_id(REG,895852b1,6)) suspecting node: be775797 2018-06-15T09:22:12.963027Z 0 [Note] WSREP: evs::proto(895852b1, LEAVING, view\_id(REG,895852b1,6)) suspected node without join message, declaring inactive 2018-06-15T09:22:12.963050Z 0 [Note] WSREP: Current view of cluster as seen by this node view (view\_id(NON\_PRIM,895852b1,6) memb { 895852b1,0 } joined { } left { } partitioned { be775797,0 } ) 2018-06-15T09:22:12.963083Z 0 [Note] WSREP: Current view of cluster as seen by this node ---
**Author:** ![hrvojem](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/hrvojem/32/6_2.png) [@hrvojem](https://forums.percona.com/u/hrvojem)\ **Post date:** [June 15, 2018, 8:34am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/10 "2018-06-15T08:34:56Z")
It looks like you’ve encountered a Percona XtraBackup bug. Can you please report it [URL][Log in - Percona JIRA](https://jira.percona.com/projects/PXB%5B/URL%5D)? Please also add `dpkg -l | grep percona` output to the bug report as well. – Hrvoje ---
**Author:** ![clouseau](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/clouseau/32/31_2.png) [@clouseau](https://forums.percona.com/u/clouseau)\ **Post date:** [July 18, 2018, 12:45pm UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/11 "2018-07-18T12:45:03Z")
Hrvoje, I have a similar situation. The fact is that I have a Percone 5.7 server, and now I’d like to upgrade it into a cluster. So before I begin, what I understand is that I have to temporary stop the server, remove it, and install the cluster package, bootstrap it (will it retain the already existing database, or should I make a backup and probably import…???), and then when I start it normally it will start working as the mysql server. So in the next step I could add nodes to it, they would sync and blue skies to everyone? Best, Istvan ---
**Author:** ![clouseau](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/clouseau/32/31_2.png) [@clouseau](https://forums.percona.com/u/clouseau)\ **Post date:** [July 20, 2018, 2:00am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/12 "2018-07-20T02:00:59Z")
…Or anyone? ---
**Author:** ![lorraine.pocklington](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/lorraine.pocklington/32/37_2.png) [@lorraine.pocklington](https://forums.percona.com/u/lorraine.pocklington)\ **Post date:** [July 20, 2018, 5:20am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/13 "2018-07-20T05:20:05Z")
Are you saying you have encountered the same problem or just that you want to upgrade to a cluster? ---
**Author:** ![clouseau](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/clouseau/32/31_2.png) [@clouseau](https://forums.percona.com/u/clouseau)\ **Post date:** [July 20, 2018, 3:15pm UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/14 "2018-07-20T15:15:14Z")
> [@lorraine.pocklington;51915](#): > > Are you saying you have encountered the same problem or just that you want to upgrade to a cluster? I just want to upgrade a prod server and asking this before I encounter a problem xD ---
**Author:** ![Patrick\_C](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/patrick_c/32/5241_2.png) [@Patrick\_C](https://forums.percona.com/u/Patrick_C)\ **Post date:** [September 5, 2018, 7:24am UTC](https://forums.percona.com/t/unable-to-install-xtradbcluster-on-a-server-where-percona-server-for-mysql-is-running/6410/15 "2018-09-05T07:24:52Z")
On Debian 9 ,if I sudo apt-get remove percona-server-client-5.7 percona-server-common-5.7 percona-server-server-5.7 and then sudo apt-get install percona-xtradb-cluster-57, the installation appears to work fine , but once completed /etc/init.d/mysql does not do anything. So that is one problem you may run into when upgrading. I have not found a fix, m work around at the moment is to start from a machine that has never had Percona or MySQL installed before. Interestingly, on my working version of /etc/init.d/mysql and my “broken” version are identical.