fix(base-ssh,ssh-ubuntu): use tini for zombie reaping and signal hand…

…ling (akash-network#565)

Use tini as an init system to manage orphaned child processes, ensuring they
don't become zombie (defunct) processes by reaping (cleaning up) them when
their parent process doesn't.

Tini will also correctly handle signals like SIGTERM (15), allowing child
processes to terminate gracefully within the allotted time, rather than
being forcefully killed with SIGKILL after a 15-second timeout.

base-ssh/Dockerfile.centos

@@ -13,8 +13,16 @@ RUN dnf -y update && \
 COPY ssh-entrypoint.sh /usr/local/bin/init.sh
 RUN chmod +x /usr/local/bin/init.sh
 
-ENTRYPOINT ["/usr/local/bin/init.sh"]
+# Use tini as an init system to manage orphaned child processes, ensuring they
+# don't become zombie (defunct) processes by reaping (cleaning up) them when
+# their parent process doesn't.
+# Tini will also correctly handle signals like SIGTERM (15), allowing child
+# processes to terminate gracefully within the allotted time, rather than
+# being forcefully killed with SIGKILL after a 15-second timeout.
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--", "/usr/local/bin/init.sh"]
 
 CMD ["tail", "-f", "/dev/null"]
 
-EXPOSE 22
+EXPOSE 22

base-ssh/Dockerfile.debian

@@ -10,8 +10,16 @@ RUN apt-get update; \
 COPY ssh-entrypoint.sh /usr/local/bin/init.sh
 RUN chmod +x /usr/local/bin/init.sh
 
-ENTRYPOINT ["/usr/local/bin/init.sh"]
+# Use tini as an init system to manage orphaned child processes, ensuring they
+# don't become zombie (defunct) processes by reaping (cleaning up) them when
+# their parent process doesn't.
+# Tini will also correctly handle signals like SIGTERM (15), allowing child
+# processes to terminate gracefully within the allotted time, rather than
+# being forcefully killed with SIGKILL after a 15-second timeout.
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--", "/usr/local/bin/init.sh"]
 
 CMD ["tail", "-f", "/dev/null"]
 
-EXPOSE 22
+EXPOSE 22

base-ssh/Dockerfile.suse

@@ -14,8 +14,16 @@ RUN mkdir -p /run/sshd && \
 COPY ssh-entrypoint.sh /usr/local/bin/init.sh
 RUN chmod +x /usr/local/bin/init.sh
 
-ENTRYPOINT ["/usr/local/bin/init.sh"]
+# Use tini as an init system to manage orphaned child processes, ensuring they
+# don't become zombie (defunct) processes by reaping (cleaning up) them when
+# their parent process doesn't.
+# Tini will also correctly handle signals like SIGTERM (15), allowing child
+# processes to terminate gracefully within the allotted time, rather than
+# being forcefully killed with SIGKILL after a 15-second timeout.
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--", "/usr/local/bin/init.sh"]
 
 CMD ["tail", "-f", "/dev/null"]
 
-EXPOSE 22
+EXPOSE 22

base-ssh/Dockerfile.ubuntu

@@ -10,8 +10,16 @@ RUN apt-get update; \
 COPY ssh-entrypoint.sh /usr/local/bin/init.sh
 RUN chmod +x /usr/local/bin/init.sh
 
-ENTRYPOINT ["/usr/local/bin/init.sh"]
+# Use tini as an init system to manage orphaned child processes, ensuring they
+# don't become zombie (defunct) processes by reaping (cleaning up) them when
+# their parent process doesn't.
+# Tini will also correctly handle signals like SIGTERM (15), allowing child
+# processes to terminate gracefully within the allotted time, rather than
+# being forcefully killed with SIGKILL after a 15-second timeout.
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--", "/usr/local/bin/init.sh"]
 
 CMD ["tail", "-f", "/dev/null"]
 
-EXPOSE 22
+EXPOSE 22

ssh-ubuntu/Dockerfile.ubuntu

@@ -10,8 +10,16 @@ RUN apt-get update; \
 COPY ssh-entrypoint.sh /usr/local/bin/init.sh
 RUN chmod +x /usr/local/bin/init.sh
 
-ENTRYPOINT ["/usr/local/bin/init.sh"]
+# Use tini as an init system to manage orphaned child processes, ensuring they
+# don't become zombie (defunct) processes by reaping (cleaning up) them when
+# their parent process doesn't.
+# Tini will also correctly handle signals like SIGTERM (15), allowing child
+# processes to terminate gracefully within the allotted time, rather than
+# being forcefully killed with SIGKILL after a 15-second timeout.
+ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
+RUN chmod +x /tini
+ENTRYPOINT ["/tini", "--", "/usr/local/bin/init.sh"]
 
 CMD ["tail", "-f", "/dev/null"]
 
-EXPOSE 22
+EXPOSE 22