I'm trying to enable security feature in Elasticsearch nodes but whenever I turn on "xpack.security.enabled: true" , my Elasticsearch won't start at all. How can I resolve this?
here's my configuration on both of Elasticsearch nodes: Node 1:
# ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: "elastic-a" # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: "elastic-master" node.master: true node.data: true # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # path.data: /var/lib/elasticsearch # # Path to log files: # path.logs: /var/log/elasticsearch # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # Set the bind address to a specific IP (IPv4 or IPv6): # network.host: 192.168.143.30 #http.host: 0.0.0.0 # # Set a custom port for HTTP: # #http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # discovery.seed_hosts: ["192.168.143.30", "192.168.143.23"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["elastic-master","elastic-slave"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Gateway ----------------------------------- # # Block initial recovery after a full cluster restart until N nodes are started: # #gateway.recover_after_nodes: 3 # # For more information, consult the gateway module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true action.auto_create_index: .monitoring*,.watches,.triggered_watches,.watcher-history*,.ml* xpack.security.enabled: true
Node 2:
# ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: "elastic-a" # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: "elastic-slave" node.master: true node.data: true # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # path.data: /var/lib/elasticsearch # # Path to log files: # path.logs: /var/log/elasticsearch # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # Set the bind address to a specific IP (IPv4 or IPv6): # network.host: 192.168.143.23 #http.host: 0.0.0.0 # # Set a custom port for HTTP: # #http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # discovery.seed_hosts: ["192.168.143.30", "192.168.143.23"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["elastic-master","elastic-slave"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Gateway ----------------------------------- # # Block initial recovery after a full cluster restart until N nodes are started: # #gateway.recover_after_nodes: 3 # # For more information, consult the gateway module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true action.auto_create_index: .monitoring*,.watches,.triggered_watches,.watcher-history*,.ml* xpack.security.enabled: true
I can enable security feature without setting up nodes (single node) but It doesn't work after setting up nodes.
sudo journalctl -f logs:
Oct 21 12:24:51 elastic-master systemd[1]: Starting Elasticsearch...
Oct 21 12:24:52 elastic-master elasticsearch[18296]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","admin"],"pid":781,"message":"Unable to revive connection: http://192.168.143.30:9200/"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","admin"],"pid":781,"message":"No living connections"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","admin"],"pid":781,"message":"Unable to revive connection: http://192.168.143.30:9200/"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","admin"],"pid":781,"message":"No living connections"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","data"],"pid":781,"message":"Unable to revive connection: http://192.168.143.30:9200/"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","elasticsearch","data"],"pid":781,"message":"No living connections"}
Oct 21 12:24:53 elastic-master kibana[781]: {"type":"log","@timestamp":"2020-10-21T08:54:53Z","tags":["warning","plugins","licensing"],"pid":781,"message":"License information could not be obtained from Elasticsearch for the [data] cluster. Error: No Living connections"}
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,557][INFO ][o.e.e.NodeEnvironment ] [elastic-master] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [32.3gb], net total_space [43.9gb], types [rootfs]
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,561][INFO ][o.e.e.NodeEnvironment ] [elastic-master] heap size [989.8mb], compressed ordinary object pointers [true]
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,612][INFO ][o.e.n.Node ] [elastic-master] node name [elastic-master], node ID [1lAXp_eJRL--r0o2Uq4P1Q], cluster name [elastic-a]
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,613][INFO ][o.e.n.Node ] [elastic-master] version[7.5.0], pid[18296], build[default/rpm/e9ccaed468e2fac2275a3761849cbee64b39519f/2019-11-26T01:06:52.518245Z], OS[Linux/3.10.0-1127.19.1.el7.x86_64/amd64], JVM[AdoptOpenJDK/OpenJDK 64-Bit Server VM/13.0.1/13.0.1+9]
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,613][INFO ][o.e.n.Node ] [elastic-master] JVM home [/usr/share/elasticsearch/jdk]
Oct 21 12:24:54 elastic-master elasticsearch[18296]: [2020-10-21T12:24:54,613][INFO ][o.e.n.Node ] [elastic-master] JVM arguments [-Des.networkaddress.cache.ttl=60, -Des.networkaddress.cache.negative.ttl=10, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dio.netty.allocator.numDirectArenas=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.locale.providers=COMPAT, -Xms1g, -Xmx1g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -Djava.io.tmpdir=/tmp/elasticsearch-1946051170077590643, -XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=/var/lib/elasticsearch, -XX:ErrorFile=/var/log/elasticsearch/hs_err_pid%p.log, -Xlog:gc*,gc+age=trace,safepoint:file=/var/log/elasticsearch/gc.log:utctime,pid,tags:filecount=32,filesize=64m, -XX:MaxDirectMemorySize=536870912, -Des.path.home=/usr/share/elasticsearch, -Des.path.conf=/etc/elasticsearch, -Des.distribution.flavor=default, -Des.distribution.type=rpm, -Des.bundled_jdk=true]
elastic-master elasticsearch[18296]: [2020-10-21T12:24:55,042][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [elastic-master] uncaught exception in thread [main]
elastic-master elasticsearch[18296]: org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:125) ~[elasticsearch-cli-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: Caused by: java.lang.IllegalStateException: failed to load plugin class [org.elasticsearch.xpack.core.XPackPlugin]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:614) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:556) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:471) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:309) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:253) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: ... 6 more
elastic-master elasticsearch[18296]: Caused by: java.lang.reflect.InvocationTargetException
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:605) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:556) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:471) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:309) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:253) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: ... 6 more
elastic-master elasticsearch[18296]: Caused by: org.elasticsearch.ElasticsearchSecurityException: failed to load SSL configuration [xpack.security.transport.ssl]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadConfiguration(SSLService.java:449) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadSSLConfigurations(SSLService.java:430) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.<init>(SSLService.java:121) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.XPackPlugin.<init>(XPackPlugin.java:142) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:605) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:556) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:471) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:309) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:253) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: ... 6 more
elastic-master elasticsearch[18296]: Caused by: org.elasticsearch.ElasticsearchException: failed to initialize SSL TrustManager - not permitted to read truststore file [/etc/elasticsearch/certs/elastic-certificates.p12]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.TrustConfig.unreadableTrustConfigFile(TrustConfig.java:121) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.StoreTrustConfig.createTrustManager(StoreTrustConfig.java:70) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.createSslContext(SSLService.java:384) ~[?:?]
elastic-master elasticsearch[18296]: at java.util.HashMap.computeIfAbsent(HashMap.java:1138) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadConfiguration(SSLService.java:446) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadSSLConfigurations(SSLService.java:430) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.<init>(SSLService.java:121) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.XPackPlugin.<init>(XPackPlugin.java:142) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:605) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:556) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:471) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:309) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:253) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: ... 6 more
elastic-master elasticsearch[18296]: Caused by: java.nio.file.AccessDeniedException: /etc/elasticsearch/certs/elastic-certificates.p12
elastic-master elasticsearch[18296]: at sun.nio.fs.UnixException.translateToIOException(UnixException.java:90) ~[?:?]
elastic-master elasticsearch[18296]: at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) ~[?:?]
elastic-master elasticsearch[18296]: at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116) ~[?:?]
elastic-master elasticsearch[18296]: at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:219) ~[?:?]
elastic-master elasticsearch[18296]: at java.nio.file.Files.newByteChannel(Files.java:374) ~[?:?]
elastic-master elasticsearch[18296]: at java.nio.file.Files.newByteChannel(Files.java:425) ~[?:?]
elastic-master elasticsearch[18296]: at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:420) ~[?:?]
elastic-master elasticsearch[18296]: at java.nio.file.Files.newInputStream(Files.java:159) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.TrustConfig.getStore(TrustConfig.java:95) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.StoreTrustConfig.createTrustManager(StoreTrustConfig.java:65) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.createSslContext(SSLService.java:384) ~[?:?]
elastic-master elasticsearch[18296]: at java.util.HashMap.computeIfAbsent(HashMap.java:1138) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadConfiguration(SSLService.java:446) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.loadSSLConfigurations(SSLService.java:430) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.ssl.SSLService.<init>(SSLService.java:121) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.xpack.core.XPackPlugin.<init>(XPackPlugin.java:142) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?]
elastic-master elasticsearch[18296]: at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
elastic-master elasticsearch[18296]: at java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[?:?]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadPlugin(PluginsService.java:605) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:556) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:471) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:163) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:309) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.node.Node.<init>(Node.java:253) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.5.0.jar:7.5.0]
elastic-master elasticsearch[18296]: ... 6 more
elastic-master systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE
elastic-master systemd[1]: Failed to start Elasticsearch.
elastic-master systemd[1]: Unit elasticsearch.service entered failed state.
elastic-master systemd[1]: elasticsearch.service failed.
elastic-master polkitd[814]: Unregistered Authentication Agent for unix-process:18290:7813320 (system bus name :1.429, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
If you turn on security, it is mandatory that the nodes talk to each other via SSL, i.e. you need to configure your nodes to encrypt communications between them. So you need to perform a few steps:
Step 1: Generate a node certificate
In this step, there are two options:
A. If you don't have any root certificate authority to sign your certificate, you can create one using bin/elasticsearch-certutil ca (follow the steps explained here). You'll obtain a certificate encoded in PKCS#12 that contains the root CA certificate, the node certificate and the private key.
B. If your organization has a root certificate authority (Digicert, etc), you can create a CSR (certificate signing request) to submit to your root CA. Usually, you'll obtain a certificate encoded in PKCS#7. PS: Let us know if this is the path you're taking because there are a few more steps involved to transform that to PKCS#12.
Note that for testing purposes you can definitely use the same certificate on both nodes, i.e. you don't need to generate one certificate per node.
Step 2: Modify your configuration
Once you have your node certificate (either through option A or B), you can modify the configuration on both nodes by adding the following in your elasticsearch.yml files:
# enable security
xpack.security.enabled: true
# make sure the nodes talk in SSL to each other
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.keystore.path: certs/mynode.p12
xpack.security.transport.ssl.truststore.path: certs/mynode.p12
After that you can restart your cluster as they can now talk in SSL to each other.