Start/stop/restart a node

Dynatrace Managed Documentation

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Dynatrace Managed software consists of a number of Dynatrace services that are dependent on each other and should be stopped or started in a particular order.

For Dynatrace Managed deployments containing three (3) or more nodes, use the cluster procedure (Start/stop/restart a cluster).
For Dynatrace Managed deployments containing less than three (3) nodes, you can use the official dynatrace.sh script with additional parameters to properly start, stop, or restart Dynatrace services on each node individually within the cluster.

By default, the script is located at /opt/dynatrace-managed/launcher/. Make sure the dynatrace.sh script has executable permissions.

You can execute the dynatrace.sh script with a parameter (start, stop, restart, status, check, pid) as described below.

start

Starts all Dynatrace Managed required services in the recommended order.
```
1[root@localhost]# ./dynatrace.sh start
```
stop

Stops all Dynatrace Managed required services in the recommended order.
```
1[root@localhost]# ./dynatrace.sh stop
```
restart

Restarts all Dynatrace Managed required services in the recommended order.
```
1[root@localhost]# ./dynatrace.sh restart
```

status

Displays a list of Dynatrace required services and the status of each, including detailed information about each service:

1[root@localhost]# ./dynatrace.sh status

1● dynatrace-firewall.service - Dynatrace Firewall settings
2  Loaded: loaded (/etc/systemd/system/dynatrace-firewall.service; enabled; vendor preset: enabled)
3  Active: active (exited) since Tue 2019-07-09 08:34:54 UTC; 1 months 3 days ago
4Main PID: 12967 (code=exited, status=0/SUCCESS)
5    Tasks: 0
6  Memory: 0B
7      CPU: 0
8  CGroup: /system.slice/dynatrace-firewall.service
9
10Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
11● dynatrace-nodekeeper.service - Dynatrace Nodekeeper
12  Loaded: loaded (/etc/systemd/system/dynatrace-nodekeeper.service; enabled; vendor preset: enabled)
13  Active: active (running) since Tue 2019-07-09 08:30:02 UTC; 1 months 3 days ago
14    Tasks: 69 (limit: 32768)
15  Memory: 389.2M
16      CPU: 2h 9min 51.936s
17  CGroup: /system.slice/dynatrace-nodekeeper.service
18          ├─  552 /opt/managed/nodekeeper/jre/bin/java -Xms239M -Xmx239M -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=60 -Duser.language=EN -Djava.io.tmpdir=...
19          ├─  966 /bin/sh /opt/managed/nodekeeper/services/watchdog.sh watch /opt/managed/nodekeeper/services/nodekeeper.sh
20          └─22167 sleep 60
21
22Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
23● dynatrace-cassandra.service - Dynatrace Cassandra
24  Loaded: loaded (/etc/systemd/system/dynatrace-cassandra.service; enabled; vendor preset: enabled)
25  Active: active (running) since Tue 2019-07-09 08:37:52 UTC; 1 months 3 days ago
26    Tasks: 199 (limit: 32768)
27  Memory: 3.2G
28      CPU: 17h 1min 32.540s
29  CGroup: /system.slice/dynatrace-cassandra.service
30          ├─13690 /opt/managed/jre/bin/java -javaagent:/opt/managed/cassandra/bin/../lib/jamm-0.3.0.jar -XX:+CMSClassUnloadingEnabled -XX:+UseThreadPriorities -XX:ThreadPr...
31          ├─13721 /bin/sh /opt/managed/services/watchdog.sh watch /opt/managed/services/cassandra.sh
32          └─22197 sleep 60
33
34Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
35● dynatrace-elasticsearch.service - Dynatrace Elasticsearch
36  Loaded: loaded (/etc/systemd/system/dynatrace-elasticsearch.service; enabled; vendor preset: enabled)
37  Active: active (running) since Tue 2019-07-09 08:38:15 UTC; 1 months 3 days ago
38    Tasks: 58 (limit: 32768)
39  Memory: 884.6M
40      CPU: 6h 59min 48.051s
41  CGroup: /system.slice/dynatrace-elasticsearch.service
42          ├─14802 /opt/managed/jre/bin/java -Xms558M -Xmx558M -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+AlwaysP...
43          ├─14834 /bin/sh /opt/managed/services/watchdog.sh watch /opt/managed/services/elasticsearch.sh
44          └─21975 sleep 60
45
46Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
47● dynatrace-server.service - Dynatrace Server
48  Loaded: loaded (/etc/systemd/system/dynatrace-server.service; enabled; vendor preset: enabled)
49  Active: active (running) since Tue 2019-07-09 08:39:01 UTC; 1 months 3 days ago
50Main PID: 2927 (code=exited, status=0/SUCCESS)
51    Tasks: 475 (limit: 32768)
52  Memory: 1.6G
53      CPU: 1d 3h 10min 18.812s
54  CGroup: /system.slice/dynatrace-server.service
55          ├─15294 /opt/managed/server/dynatraceserver -vm=/opt/managed/jre/bin/java -vmargs -Xms2873M -Xmx2873M -XX:-OmitStackTraceInFastThrow -XX:+UseConcMarkSweepGC -XX:...
56          └─15302 /opt/managed/jre/bin/java -Dcom.compuware.apm.WatchDogPort=50004 -classpath :/opt/managed/server/lib/ace-1.4.4-dt-2.0.jar:/opt/managed/server/lib/acme4j-...
57
58Aug 12 13:04:05 ip-10-176-32-69 sudo[20856]: pam_unix(sudo:session): session closed for user root
59Aug 12 13:04:05 ip-10-176-32-69 sudo[21125]:  dynaman : TTY=unknown ; PWD=/opt/managed/server ; USER=root ; COMMAND=/opt/dtrun/dtrun service dynatrace-cassandra status
60Aug 12 13:04:05 ip-10-176-32-69 sudo[21125]: pam_unix(sudo:session): session opened for user root by (uid=0)
61Aug 12 13:04:05 ip-10-176-32-69 sudo[21125]: pam_unix(sudo:session): session closed for user root
62Aug 12 13:04:05 ip-10-176-32-69 sudo[21389]:  dynaman : TTY=unknown ; PWD=/opt/managed/server ; USER=root ; COMMAND=/opt/dtrun/dtrun service dynatrace-security-gateway status
63Aug 12 13:04:05 ip-10-176-32-69 sudo[21389]: pam_unix(sudo:session): session opened for user root by (uid=0)
64Aug 12 13:04:05 ip-10-176-32-69 sudo[21389]: pam_unix(sudo:session): session closed for user root
65Aug 12 13:04:05 ip-10-176-32-69 sudo[21665]:  dynaman : TTY=unknown ; PWD=/opt/managed/server ; USER=root ; COMMAND=/opt/dtrun/dtrun service dynatrace-server status
66Aug 12 13:04:05 ip-10-176-32-69 sudo[21665]: pam_unix(sudo:session): session opened for user root by (uid=0)
67Aug 12 13:04:05 ip-10-176-32-69 sudo[21665]: pam_unix(sudo:session): session closed for user root
68Hint: Some lines were ellipsized, use -l to show in full.
69● dynatrace-security-gateway.service - Dynatrace Active Gate
70  Loaded: loaded (/etc/systemd/system/dynatrace-security-gateway.service; enabled; vendor preset: enabled)
71  Active: active (running) since Tue 2019-07-09 08:39:37 UTC; 1 months 3 days ago
72Main PID: 16173 (dynatracegatewa)
73    Tasks: 247 (limit: 32768)
74  Memory: 410.7M
75      CPU: 3h 44min 58.189s
76  CGroup: /system.slice/dynatrace-security-gateway.service
77          ├─16173 /opt/managed/security-Gateway/launcher/dynatracegateway -bg -vm=/opt/managed/jre/bin/java -vmargs -Xms638M -Xmx638M -XX:+UseConcMarkSweepGC -XX:CMSInitia...
78          └─16182 /opt/managed/jre/bin/java -Dcom.compuware.apm.WatchDogPort=50005 -classpath /opt/managed/security-Gateway/lib/* -XX:ErrorFile=/var/opt/managed/log/securi...
79
80Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
81● dynatrace-nginx.service - Dynatrace NGINX
82  Loaded: loaded (/etc/systemd/system/dynatrace-nginx.service; enabled; vendor preset: enabled)
83  Active: active (running) since Tue 2019-07-09 08:39:46 UTC; 1 months 3 days ago
84    Tasks: 14 (limit: 32768)
85  Memory: 92.7M
86      CPU: 40min 38.507s
87  CGroup: /system.slice/dynatrace-nginx.service
88          ├─17152 nginx: OneAgent companion process
89          ├─17153 nginx: master process /opt/managed/nginx/sbin/nginx -c /opt/managed/nginx/conf/nginx.conf
90          ├─17155 nginx: worker process
91          ├─17156 nginx: worker process
92          ├─17164 /bin/bash /opt/managed/services/logs-watcher.sh watch-nginx /var/opt/managed/log/nginx/access.log /var/opt/managed/log/nginx/error.log
93          └─19214 sleep 600
94
95Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
96All services are OK

check

Checks the status of iptable rules and the processes for Nodekeeper, Cassandra, Elasticsearch, ActiveGate, Watcher, and NGINX.

1[root@localhost]# ./dynatrace.sh check

1Checking rules in iptables ...
2Rule is present in 'filter': INPUT -p tcp -m tcp -m multiport --ports 443,5701:5711,7000:7001,7199,8018:8022,8443,9042,9200,9300,9998 -j DROP
3Rule is present in 'filter': OUTPUT -p tcp -m tcp -m multiport --ports 443,5701:5711,7000:7001,7199,8018:8022,8443,9042,9200,9300,9998 -j ACCEPT
4Rule is present in 'filter': INPUT -p tcp -m addrtype --src-type LOCAL -m tcp -m multiport --ports 443,5701:5711,7000:7001,7199,8018:8022,8443,9042,9200,9300,9998 -j ACCEPT
5Rule is present in 'filter': INPUT -s 10.10.10.10/32 -p tcp -m tcp -m multiport --ports 5701:5711,7000:7001,7199,8019,9042,9200,9300 -j ACCEPT
6Rule is present in 'filter': INPUT -p tcp -m tcp -m multiport --ports 443,8020:8022,8443,9998 -j ACCEPT
7Rule is present in 'filter': FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
8Rule is present in 'nat': PREROUTING -p tcp -m addrtype --dst-type LOCAL -m tcp --dport 443 -j REDIRECT --to-ports 8022
9Rule is present in 'nat': OUTPUT -p tcp -m addrtype --dst-type LOCAL -m tcp --dport 443 -j REDIRECT --to-ports 8022
10All rules are active.
11Nodekeeper is running at launcher PID: 966, main PID: 552, listening on ports 8018
12Cassandra is running at launcher PID: 13721, main PID: 13690, listening on ports 9042
13Elasticsearch is running at launcher PID: 14834, main PID: 14802, listening on ports 9200,9300
14{
15  "cluster_name" : "11bc1cd1e1-c222-33e3-4f44-0e0bc0dcdc0d",
16  "status" : "yellow",
17  "timed_out" : false,
18  "number_of_nodes" : 1,
19  "number_of_data_nodes" : 1,
20  "active_primary_shards" : 299,
21  "active_shards" : 299,
22  "relocating_shards" : 0,
23  "initializing_shards" : 0,
24  "unassigned_shards" : 598,
25  "delayed_unassigned_shards" : 0,
26  "number_of_pending_tasks" : 0,
27  "number_of_in_flight_fetch" : 0,
28  "task_max_waiting_in_queue_millis" : 0,
29  "active_shards_percent_as_number" : 33.33333333333333
30}
31Server is running at launcher PID: 15294, main PID: 15302, listening on ports 8021
32ActiveGate is running at launcher PID: 16173, main PID: 16182, listening on ports 8443
33Command to run as user dynaman: /opt/managed/services/logs-watcher.sh status
34Watcher is running, reporting in log: /var/opt/managed/log/logs-watcher-for-nginx-logs.log
35NGINX is running at launcher PID: 17153, main PID: 17155 17156, listening on ports 8022
36All processes are OK

pid

Displays the process ID for all Dynatrace required services that were started with the dynatrace.sh script.
```
1[root@localhost]# ./dynatrace.sh pid
```
```
1966 552 13721 13690 14834 14802 15294 15302 16173 16182 17153 17155 17156
```