{"id":9839,"date":"2017-03-09T21:21:10","date_gmt":"2017-03-09T20:21:10","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\/"},"modified":"2017-03-09T21:21:10","modified_gmt":"2017-03-09T20:21:10","slug":"oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\/","title":{"rendered":"Oracle 12cR2, RAC, Cloud, ACFS, PDB thin clones and asmadmin"},"content":{"rendered":"<h2>By Franck Pachot<\/h2>\n<p>.<br \/>\nIn the Oracle Public Cloud, fast provisioning gets all its meaning when creating a RAC database service: in one hour you can get an operational highly available multitenant database. You can even create it in Data Guard for Disaster Recovery. Now, Oracle is pushing ACFS to store the datafiles rather than direct ASM. Especially in multitenant because a great feature is thin cloning: CREATE PLUGGABLE DATABASE AS SNAPSHOT COPY. However, I encountered an error when I tried it for the first time.<br \/>\n<!--more--><\/p>\n<h3>TDE keystore<\/h3>\n<pre><code>SQL&gt; create pluggable database pdb2 from pdb1 snapshot copy;\ncreate pluggable database pdb2 from pdb1 snapshot copy\n*\nERROR at line 1:\nORA-28357: password required to open the wallet<\/code><\/pre>\n<p>Oh yes, in the cloud all tablespaces are encrypted. In 12.2 we can put the keystore password in the command:<\/p>\n<h3>ORA-17517<\/h3>\n<pre><code>SQL&gt; create pluggable database pdb2 from pdb1 snapshot copy keystore identified by \"Ach1z0#d\" ;\n&nbsp;\ncreate pluggable database pdb2 from pdb1 snapshot copy keystore identified by \"Ach1z0#d\"\n*\nERROR at line 1:\nORA-65169: error encountered while attempting to copy file\n\/u02\/app\/oracle\/oradata\/CDB1\/49FC0C40FCF62C05E053BAF6C40A9DD6\/datafile\/o1_mf_users_dcr220sd_.dbf\nORA-17517: Database cloning using storage snapshot failed on file\n8:\/u02\/app\/oracle\/oradata\/CDB1\/49FC0C40FCF62C05E053BAF6C40A9DD6\/datafile\/o1_mf_users_dcr220sd_.dbf<\/code><\/pre>\n<p>Here we are. The call to the storage snapshot feature has failed. Usually the errors coming from OS calls are accompanied with additional information but not here.<\/p>\n<h3>alert.log and trace<\/h3>\n<p>In alert.log, the error is displayed with reference to some other trace files:<\/p>\n<pre><code>2017-03-05 16:24:38.935000 +00:00\ncreate pluggable database pdb2 from pdb1 snapshot copy keystore identified by *\n AUDSYS.AUD$UNIFIED (SQL_TEXT) - CLOB populated\nWARNING: Detected that PDB needs to import keys from source. PDB can only open in restricted mode until import.\n2017-03-05 16:24:40.447000 +00:00\nErrors in file \/u01\/app\/oracle\/diag\/rdbms\/cdb1\/cdb11\/trace\/cdb11_p000_8910.trc:\nErrors in file \/u01\/app\/oracle\/diag\/rdbms\/cdb1\/cdb11\/trace\/cdb11_p002_8918.trc:\nErrors in file \/u01\/app\/oracle\/diag\/rdbms\/cdb1\/cdb11\/trace\/cdb11_p001_8914.trc:\nErrors in file \/u01\/app\/oracle\/diag\/rdbms\/cdb1\/cdb11\/trace\/cdb11_p003_8922.trc:\n**************************************************************\nUndo Create of Pluggable Database PDB2 with pdb id - 4.\n**************************************************************\nORA-65169 signalled during: create pluggable database pdb2 from pdb1 snapshot copy keystore identified by * ...<\/code><\/pre>\n<p>And those trace files have the following information:<\/p>\n<pre><code>ksfdsscre_clone: create snapshot failed error(-1) errmsg(OS dependent failure) voltag(49FF372094256196E053BAF6C40AEB9D) parent_voltag() mntbuf(\/u02)\n<\/code><\/pre>\n<p>This is not very helpful by itself. We see the snapshot name (voltag) and the parent name (parent_voltag). You may know that error (-1) is EPERM  which is &#8216;operation not permitted&#8217;. What I did to be sure was to try to create the snapshot myself:<\/p>\n<pre><code>[oracle@rac1 cdb11]$ acfsutil snap create -w 49FFA9651D1D58D5E053BAF6C40AF81C \/u02\nacfsutil snap create: CLSU-00100: operating system function: ioctl failed with error data: 1\nacfsutil snap create: CLSU-00101: operating system error message: Operation not permitted\nacfsutil snap create: CLSU-00103: error location: OI_0\nacfsutil snap create: ACFS-03046: unable to perform snapshot operation on \/u02<\/code><\/pre>\n<h3>EPERM<\/h3>\n<p>This is more clear and I also strace&#8217;d it to see where the error comes from:<\/p>\n<pre><code>open(\"\/u02\", O_RDONLY)                  = 41\nioctl(41, RTC_UIE_ON, 0x7fff17ae17a0)   = 0\nioctl(41, 0xffffffffc1287021, 0x7fff17ae0e90) = -1 EPERM (Operation not permitted)<\/code><\/pre>\n<p>I&#8217;m running that with the oracle user, as the instance does when creating a PDB:<\/p>\n<pre><code>uid=1001(oracle) gid=1001(oinstall) groups=1001(oinstall),1002(dba),1003(racoper),1004(asmdba)<\/code><\/pre>\n<h3>grid<\/h3>\n<p>When connecting as grid, I am able to create the snapshot<\/p>\n<pre><code>[grid@rac1 ~]$ acfsutil snap create -w 49FFA9651D1D58D5E053BAF6C40AF81C \/u02\nacfsutil snap create: Snapshot operation is complete.\n[grid@rac1 ~]$ acfsutil snap delete 49FFA9651D1D58D5E053BAF6C40AF81C \/u02\nacfsutil snap delete: Snapshot operation is complete.\n<\/code><\/pre>\n<p>Grid has the following permissions:<\/p>\n<pre><code>uid=1000(grid) gid=1001(oinstall) groups=1001(oinstall),1003(racoper),1004(asmdba),1005(asmoper),1006(asmadmin)<\/code><\/pre>\n<h3>asmadmin<\/h3>\n<p>This is what \/etc\/group looks like:<\/p>\n<pre><code>opc:x:54323:\noinstall:x:1001:\ndba:x:1002:oracle\nracoper:x:1003:oracle,grid\nasmdba:x:1004:oracle,grid\nasmoper:x:1005:grid\nasmadmin:x:1006:grid<\/code><\/pre>\n<p>This is what the Oracle Public Cloud defines at RAC DBaaS service creation, and asmadmin is not mentioned in <a href=\"https:\/\/docs.oracle.com\/database\/122\/LADBI\/creating-an-oracle-software-owner-user.htm#LADBI-GUID-C1E5CEA8-741A-4500-B03E-B4A6BC1E87BB\" target=\"_blank\" rel=\"noopener noreferrer\">documentation<\/a>.<\/p>\n<p>So, to solve (or workaround) the issue, I&#8217;ve added oracle to the asmadmin group:<\/p>\n<pre><code>asmadmin:x:1006:grid,oracle<\/code><\/pre>\n<p>and now, I&#8217;m able to create a snapshot when logging as oracle:<\/p>\n<pre><code>[oracle@rac1 ~]$ acfsutil snap create -w 49FFA9651D1D58D5E053BAF6C40AF81C \/u02\nacfsutil snap create: Snapshot operation is complete.\n[oracle@rac1 ~]$ acfsutil snap delete 49FFA9651D1D58D5E053BAF6C40AF81C \/u02\nacfsutil snap delete: Snapshot operation is complete.\n<\/code><\/pre>\n<h3>restart<\/h3>\n<p>I thought that restarting the instance would be sufficient, but it is not. I had to restart the cluster. And this is also something easy in the Oracle Public Cloud:<\/p>\n<p><a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/CaptureRestartOPCRAC.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/CaptureRestartOPCRAC.png\" alt=\"CaptureRestartOPCRAC\" width=\"986\" height=\"139\" class=\"alignnone size-full wp-image-15113\" \/><\/a><\/p>\n<p>A simple click restarts the first node, and then, once it is up again, restarts the second node.Rolling reboot ensures that the service is always up.<\/p>\n<h3>Thin clone<\/h3>\n<p>Here it is. The instance is now able to create a snapshot.<\/p>\n<pre><code>Connected to:\nOracle Database 12c EE Extreme Perf Release 12.2.0.1.0 - 64bit Production\n&nbsp;\nSQL&gt; set echo on\nSQL&gt; create pluggable database pdb2 from pdb1 snapshot copy keystore identified by \"Ach1z0#d\" ;\nPluggable database created.\n&nbsp;\nElapsed: 00:00:30.36<\/code><\/pre>\n<h3>So what?<\/h3>\n<p>In my opinion, the configurations that stores a CDB datafiles on ACFS should give the rights to create snapshots to the user running the database. The cloud interface is very simple, but the technology behind is complex. The consequence of this gap is that using the cloud is easy when everything goes as expected, but any exception can bring us into troubleshooting.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>By Franck Pachot . In the Oracle Public Cloud, fast provisioning gets all its meaning when creating a RAC database service: in one hour you can get an operational highly available multitenant database. You can even create it in Data Guard for Disaster Recovery. Now, Oracle is pushing ACFS to store the datafiles rather than [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":9840,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[955,229],"tags":[656,600,220,135,221,64,96,209,66,223],"type_dbi":[],"class_list":["post-9839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud","category-database-administration-monitoring","tag-12-2","tag-acfs","tag-cdb","tag-cloud","tag-data-guard","tag-multitenant","tag-oracle","tag-oracle-12c","tag-pdb","tag-pluggable-databases"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Oracle 12cR2, RAC, Cloud, ACFS, PDB thin clones and asmadmin - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle 12cR2, RAC, Cloud, ACFS, PDB thin clones and asmadmin\" \/>\n<meta property=\"og:description\" content=\"By Franck Pachot . In the Oracle Public Cloud, fast provisioning gets all its meaning when creating a RAC database service: in one hour you can get an operational highly available multitenant database. You can even create it in Data Guard for Disaster Recovery. Now, Oracle is pushing ACFS to store the datafiles rather than [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-09T20:21:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/CaptureRestartOPCRAC.png\" \/>\n\t<meta property=\"og:image:width\" content=\"986\" \/>\n\t<meta property=\"og:image:height\" content=\"139\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Oracle Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Oracle Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\\\/\"},\"author\":{\"name\":\"Oracle Team\",\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/#\\\/schema\\\/person\\\/66ab87129f2d357f09971bc7936a77ee\"},\"headline\":\"Oracle 12cR2, RAC, Cloud, ACFS, PDB thin clones and asmadmin\",\"datePublished\":\"2017-03-09T20:21:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\\\/\"},\"wordCount\":459,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/oracle-12cr2-rac-cloud-acfs-pdb-thin-clones-and-asmadmin\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.dbi-services.com\\\/blog\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2022\\\/04\\\/CaptureRestartOPCRAC.png\",\"keywords\":[\"12.2\",\"ACFS\",\"CDB\",\"Cloud\",\"Data Guard\",\"multitenant\",\"Oracle\",\"Oracle 12c\",\"PDB\",\"Pluggable Databases\"],\"articleSection\":[\"Cloud\",\"Database Administration &amp; 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